eChapters

Introduction

Packaging is one of the most important processes to maintain the quality of food products for storage, transportation and end-use. The basic functions of packaging are considered as protection, containment, information and convenience. Food packaging was initially considered to increase the marketable life of the food in a container by protecting it from the influence of the environmental factors. Then it was expected to be informative, easy-to handle and disposal-friendly with increased functionality. Current innovations of food packaging technology are geared to ensure one/ all of these properties along with better protection, more efficient quality preservation and enhanced safety of the packaged food. Innovative packaging technologiesalso prevent the rate of quality deterioration and facilitate easy handling of the produce during distribution and marketing. During distribution, the quality of the food product can deteriorate biologically and chemically as well as physically. Innovative packaging technologies are the most important and challenging technologies to overcome these limitations.These technologies require specific knowledge and appropriate training and understanding for rationally selecting the most suitable packaging for each product and intended use. Innovative packaging of foods includes active packaging, smart packaging, on-the-go packaging, intelligent packaging etc. which have been briefly discussed in this manuscript.

Introduction

The food production in India has been on a rising trajectory and the country is among the top producers of several crops. It is the highest producer of milk and second highest producer of fruits and vegetables. Total food grain production in the country is estimated at record 291.95 million tonnes (MT; Second Advance Estimates for 2019-20) which is 6.74 MT higher over 2018-19. While enhanced field productivity is an essential component of agricultural sector, improved postharvest handling, marketing and processing is equally essential to reduce the waste, particularly in a country where such losses are substantial and add stress on limited farming resources, appropriate agrilogistic is needed. Post-production management and marketing infrastructure is therefore, not only vital but a priority. Such infrastructure and the services they provide are essential not only for the efficient performance of various marketing functions, but also for effective expansion of the size of markets which allows for growth.An efficient post-harvest logistics network not only ensures that produce will reach destination markets in quality and quantity, but should also trigger a steady reverse flow of market information to the source.

Introduction

Agriculture is the backbone of Indian economy. Good harvest helps in moving the economy in the right direction. The agriculture sector accounts for 17% of US$ 2.6 trillion economy of India (Anonymous, 2019a) and employs 54.6% of the country’s workforce (Anonymous, 2019b). India occupies first place in the production of pulses, jute and milk, and second place in rice, wheat, cotton, sugarcane, vegetables and fruits (FAO STAT, 2020). The agriculture export constitutes a fifth of total exports made by India and self-reliance in agriculture is required to become an economic superpower. The green revolution has paved the way from begging bowl to overflowing granaries in our country. The overall food production has increased from 52 MT in 1950-51 to 295 MT in 2019-20, which is a phenomenal growth of more than five times in seven decades span. Of the several factors that influenced the sea change in agriculture production and productivity, the quality seed of improved varieties occupies a crucial position. The green revolution was ushered in by the import of 18000 tonnes of seed of high yielding wheat varieties Lerma Rojo and Sonara 64 and rice variety IR-8. Till today, the quality seed alone contributes to 15-20% of total production (Chauhan et al., 2015), indicating its importance in agricultural production of the country. The problematic global scenarios like economic recession, climate change, water scarcity, population explosion, pollution or new pandemics drives the states to be more self-reliant. To be self-reliant is not to be altogether “self-contained”. We should be opened for the best material available anywhere in the world, and simultaneously we should develop our infrastructure and industry to cater to the needs of our population as well as export to other countries. Seed sector is one of the potential areas for boosting self-reliance as well as has a lot of export potential. The government push for self-reliance under the present COVID-19 pandemic situation by infusing INR one lakh crore as agricultural infrastructure fund that will help in developing several start-ups. The success of this movement mainly depends on innovations in every sector, including the seed sector and simultaneously, there is a need to extend it to the regulatory mechanisms. This chapter will discuss the possible areas of innovations that are already in the pipeline and those to be targeted in the areas of seed production, quality assurance, marketing and regulation along with policy interventions needed to boost the seed sector.

The introduction of high yielding varieties, additional irrigation facilities, a great input flow through fertilizers and pesticides, farm mechanization, credit facilities and other rural infrastructure facilities ushered in the green revolution. The food grains area under irrigation as a percentage to its total sown area has been increased from 20.9 to 51.2%, rice irrigated area from 36.5 to 58.3%, wheat from 43.1 to 93.4%, pulses from 9.4 to 18.6%, oilseeds from 3.7 to 28.6% during the period from 1965-66 to 2013-14 (DES, 2015). Despite the net sown area being stagnant around 140.80 M ha, gross cropped area has been increased significantly from 155.28 M ha in 1965-66 to 195.25 M ha in 2011-12 due to increase in net irrigated area from 26.34 to 65.26 M ha (Fig. 1), gross irrigated area from 30.90 to 91.53 M ha during the period. There has been a sharp decline in average size of operational land holdings. The scope for expansion of the area available for cultivation has become limited. The average size of holdings for all operational classes (small & marginal, medium and large) have declined over the years and for all classes put together it has come down to 1.16 ha in 2010-11 from 2.28 ha in 1970-71. Therefore, it is the urgent need to use the natural resource like water efficiently and in a sustainable manner.

Introduction

The arid regions in India occupy 38.7 million ha (Mha), comprising 31.7 and 7 Mha under hot and cold arid region, respectively. The major part (90%) of the hot arid region lies in Northwest (NW) India and the rest in geographically isolated pockets in South India. The NW arid region extends from 22°30” to 32°50” N and 68°50” to 75°45”E , bounded by Aravalli hills in the east, Thar desert in the west the irrigated Indus plain in the north and the alluvial plains of the Sabarmati river in the south. The region mostly lies in western Rajasthan covering 12 districts (196150 km², 68.7%) followed six districts in northwest Gujarat (62180 km² 21.8%), five districts in southwest Haryana in (12840 km² 4.5%), and six districts in southwest Punjab in (14510 km², 5.0%) (Fig.1). The region is characterized by low rainfall (100 to 400 mm yr-1), that is also erratic and highly unpredictable (coefficient of variation, CV = 30 to 70%); high evaporation (1600 to 2000 mm yr-1); temperature extremes (-5.7° C to 50°C); frequent droughts (once in 2.5-5.0 years); strong winds (20-50 km h-1) during summer; and short crop growing period (8 to 15 weeks) (Moharana et al., 2016). Despite the common characteristics of aridity and extremes of temperatures, there are enormous spatial variations in terms of rainfall pattern, physiography, soils, amount of available surface and ground water, and extent of vegetation cover (Joshi, 2012). Accordingly, the NW hot arid region has been classified in 4 sub-regions, 11 zones and 34 sub zones (Faroda et al., 1999).

Despite these intimidating conditions, the region supports a large human and livestock population and biodiversity. However, the ever-increasing human and livestock population and developmental activities exert enormous biophysical pressure on the slender natural resource base of the region. A major challenge is desertification due to wind erosion/deposition, water erosion, water logging and salinity. Degradation of permanent pastures has led to loss of fodder resources constraining livestock husbandry, the backbone of the economy of the region. Of late, industrial effluents and mining are also contributing to desertification.

Historical Perspective of Agricultural Education Policy in India

Pre-Independence Era

During the reign of the British Crown, vocational education and training suffered a great setback and there was a lack of emphasis on agricultural education, even though the Indian economy, to a great extent, depended on agriculture. In 1901, only five institutions were imparting theoretical and practical instruction in agriculture, but that education was not used in extension or fieldwork—it served only as an opening for government white-collar jobs (Crane, 1965).

Post-Independence Era

Prior to the establishment of agricultural universities, university-level education in agriculture, animal science, horticulture, agricultural engineering, and allied subjects were largely conducted by colleges affiliated with general universities that had no special commitment to the farming community. The University Education Commission of 1947, among other things, examined the state of agricultural education in India. The report of this Commission emphasized the need for having what was termed “Rural Universities.” In 1954, the First Joint Indo-American Team on Agricultural Research and Education fully endorsed the recommendations of the University Education Commission and strongly recommended the immediate establishment of agricultural universities in a few selected states. The U.S. agricultural advisors who began to arrive in India in the early 1950s were products of the land-grant university system, and many of them naturally believed India could benefit by creating a similar system (Goldsmith, 1988). The Government of India accepted this recommendation and the first agricultural university in Uttar Pradesh now named as Govind Ballab Pant of Agriculture & Technology was established in 1960, patterned on the land-grant university model of the United States. This was a significant turning point in the history of agricultural education in India. The Second Joint Indo-American Commission (1959) reiterated the recommendations of the First and recommended that at least one agricultural university be established in each state. Agricultural universities have now been established in 21 of the 28 states and the concept of the agricultural university now forms an essential part of the national policy on education.

Introduction

It is known and well documented that ‘biological diversity’ (i.e. diversity within species, between species and within ecosystems) has been declining at a much faster rate than earlier time in human history. The current rate of extinction is tens to hundred times higher than the average over the past 10 million years and it is accelerating (IPBES, 2019). The estimates of the number of species getting extinct every year vary from low (200 to 2,000) to high (10,000 and 100,000) (Bar-On et al., 2018). The delicate balance of clean air, water and biodiversity in nature which helps in survival on earth, is rapidly being destroyed due to humans’ activity like growing of food, producing energy, dispose of waste and consume resources (IPBES, 2019). The current human population of the world (7.6 billion) represents only 0.01% of all living creatures and attributed to be instrumental in causing loss of 83% of all wild mammals and half of plants (IPBES, 2019). These unprecedented changes in important components of biodiversity are likely to continue or increase in the foreseeable future, unless we take active corrective measures (IPBES, 2019).

Whilst all biodiversity has intrinsic economic or social value, it is the ‘agricultural biodiversity’ (‘agrobiodiversity’ in short) that has the greatest importance for food nutrition and health security of humans. The FAO has recently defined biodiversity for food and agriculture (BFA) as a subset of biodiversity that contributes primarily to agriculture and food production (FAO, 2019). It includes the domesticated plants and animals raised in crop, livestock, forest and aquaculture systems, harvested forest and aquatic species, the wild relatives of domesticated species, other wild species harvested for food and other products. It also encompasses “associated biodiversity”

Introduction

Climate change effect is global and one of the most pressing issues of the 21^st century. It has now emerged as a significant global environmental challenge affecting crop, animal, fish, egg and milk production, water availability, human health, and terrestrial and aquatic ecosystems. Evidences of changes in climate, particularly to the spatial and temporal variability of precipitation and temperature are many and as a result, uncertainty, risks and farmers distress have increased manifold over the current years. India, a developing nation and primarily an agriculturally based country will be highly affected due to greater dependence on agriculture for livelihood of larger proportion of population (Johnson and Hutton, 2014). Anthropogenic forces like rise in population, economic activities, consumption patterns, social behaviour, energy resource utilization and land-use changes in terms of deforestation, use of fossil fuels, industrialization, and race towards development, high concentration of green house gases (GHG) has been released resulting in global warming, a major factor leading to climate change. This heat of climate change has been experienced globally and has affected all forms of life on earth in many ways (Campbell-Lendrum et al, 2015).

As per the fifth assessment report of IPCC (2014), proportional sharing in GHGs emission of various sectors are energy production (34%), and agriculture, forestry and land-use (AFOLU) (24%), mainly contributed by biomass burning and resource intensive agronomic activities (Houghton et al., 2012; Tubiello et al., 2015). Global food security has been threatened by climate change more so in developing nations through changes in soil properties, and is one of the most important challenges in the 21^st century to supply food for the increasing population.

Since climate change is inevitable, we must consider how best we can adapt it, so as to minimize its harmful consequences on the society. For subsistence farmers in India, adaptation in response to changes in climate patterns can be the difference between survival and calamity. There is a need to bring innovations on climate smart agriculture and also necessary agricultural reforms for emerging of a self-reliant India.

Introduction

Agricultural Extension is as ancient as agriculture itself. When it moves in agricultural trends, the importance on extension has also been transformed. Firstly, agricultural extension was the component of the research-extension-farmer approach. In the Training and Visit (T&V) period, communication of innovation was the crucial concept and the role of extension was to successfully disseminate the technological interventions. However, after the green revolution, the gap between resource rich and resource poor farmers widened with information and extension reaching only a few of them. With the conceptualization of new models, like Agricultural Knowledge and Information Systems (AKIS), the focus of extension has changed to formation of groups and collective farming. In time, the private sector has also entered into the agricultural arena, introducing the concept of pluralism in extension. Emphasis on mass media has also increased. More recently, Agricultural Innovation Systems (AIS) is introduced within the innovation systems framework. It focuses on the actors, their interactions, the institutions, and the policy environment to support or hinder it. Communication for innovation is the key AIS concept tried to identify the actors in systems, their core activities and bring them into an innovation platform for effective service and successful innovations (Saravanan, 2017).

Introduction and Background

Agriculture at present has the trend of using an industrialized production model, where crops and animals are produced in systems that are increasingly specialized, simplified and concentrated, to address growing food, feed and fibre demands. Within this model, external inputs (e.g. irrigation, synthetic fertilizers chemical pest control, feeds, and growth hormones) have been utilized to achieve production goals, often at the expense of environmental quality and key ecosystem services. Continuation of this model of agricultural production has resulted in loss of ecosystem services, increased ecosystem simplification and species extinction. Responses to future challenges in agriculture should include the development of novel systems that are highly productive, minimize damage to the environment and effectively utilize renewable resources. Achieving these multiple goals will be a momentous task, as it will require development and implementation of more complex, diverse and management-intensive production systems than currently employed. Furthermore, future agricultural production systems will need to be adaptable to respond to unforeseen environmental challenges. Integrated agricultural systems have been purported to possess attributes to address these challenges. Agro-chemicals, fuel-based mechanization and irrigation operations are the heart of industrial agriculture which is derived entirely from dwindling and ever more expensive fossil fuels. Intensification of agriculture by the use of high yielding crop varieties, fertilization, irrigations and pesticides are impact heavily on natural resources with serious health and environmental implications. Practice of monoculture in some parts of the country and the world has an adverse environmental impact due to lack of ecological regulation mechanisms and heavily dependent on external inputs.

Introduction

Majority of the India’s population (about 70%) depend directly and indirectly on agriculture for a living, and thus, the sector must attain self-reliance for their future survival. The North Eastern Region (NER) of India comprising the states of Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, Tripura and Sikkim covers a total area of 26.2 million hectare (7.97% of the India’s total geographical area). Of this area, hill and mountain region accounts for about 70% area that excludes Assam plains. The region is characterized by unique geophysical socio-cultural and environmental features. Drought and floods are the two miseries for the farmers of North Eastern Region of India (NER). The poorest people are likely to be the hardest hit by impacts of climatic factors and its change because they rely heavily on climate-sensitive sectors such as rainfed agriculture and fisheries. They are also less capable to respond due to limited human, institutional and financial capacity and have very limited ability to cope with climate impacts and adaptation options in agriculture sector to a changing hazard burden (Ngachan and Das, 2018). The NER of India is endowed with enormous water resources potential that accounts for about 34% of the country’s total water wealth. In spite of the abundant water resources, the ratio of percent irrigated area to net sown area varies from 5% in Assam to 28% in Arunachal Pradesh with an average of 10.6 % in NER. This is less than one-fourth of the national average of net irrigated area which currently stands at 43.2% (Sharma et al., 2010). The water scenario in the region is skewed and is characterized by plenty and scanty syndrome, i.e. excess water during rainy season and severe scarcity during post- and pre- monsoon season. There is wide variation of rainfall in space and time. It is projected that by 2021, an additional 15 million population will be added to the current 45 million in the region (Choudhury et al., 2012). Hence, adequate planning and management of these bountiful but most vital resources are required for overall sustainability of agriculture in NER.

Edible oil scenario

Vegetable oil or edible oil is the main source of energy in humans and it also supplies nutrients for growth and maintenance of human body. Edible oil demand in India has been increasing progressively since last one decade, primarily due to population growth, improved standard of living and also changes in food habits. Presently, the area under oil seed production is between 26 and 27 million ha with an average yield of 1000 to 1100 kg ha^-1. This accounts to 7.5 to 8.0 million tonnes of vegetable oil production locally, as against the current demand of 22.5 to 23 million tonnes per annum.

The extreme weather events being experienced at a greater frequency now a days are due to accelerated climate change caused mostly due to global warming. Global warming is basically a change in the climatic conditions of the Earth, brought about by a considerable rise in the near-surface temperature of the planet. Earth’s surface and the troposphere become warmer due to absorption of infrared radiation emitted by the Earth’s surface by Green House Gases(GHGs). The important green house gases include carbon dioxide(CO₂),methane(CH₄) nitrous oxide(N₂O), chloro-?uoro-carbons(CFCs), ozone(O₃) and water vapour(H₂O). Various climate models predict major changes in our weather patterns, environment, and way of life in absence of efforts for substantial reductions in GHG emissions. The CO₂ gas concentration of atmosphere has increased to 385 ppm as against the normal concentration of 300 ppm. The atmosphere contains only 1 % of the total global carbon pool. The undesirable changes can be reversed by increasing soil and eco system carbon pools, increasing mean resident time(MRT) of sequestered carbon and decreasing GHG emission to atmosphere.

Introduction

Despite environmental, bio-physical, and resource constraints in most parts of Rajasthan, even though the state’s geography can be classified into three distinct climatic zones: hot arid, semi-arid, and sub-humid, from a horticultural perspective. These diverse zones have excellent vegetable production potential, a wide range of crop plants, and varied opportunities for resource utilization. However, extremes of high (March–October) and low (December–January) temperature situations associated with abiotic stresses in arid regions restrict the choice of crops and their genotypes, quality of product, and productivity levels. Thus, vegetable exploitation with adaptive and native crop plants is generally found to be most productive and stable under the dry-land climate of the state that receives 150–650 mm of rain and has problems from abiotic factors owing to climatic variability, extremes in temperatures, drought, frost, hot and cold winds, and soil and water quality.

Vegetable production in the country is largely uneven and concentrated, mainly in the limited states and areas where the climate is much more favorable and mild for their production. In addition, emphasis is given only to the few numbers of vegetables that are grown with high inputs and irrigations. To meet the increasing vegetable demand and utilization of indigenous resources, there is the utmost need for massive and integrated efforts with unconventional, under-scored, and perennial vegetable production. The increase in vegetable production can be achieved first by developing high-yielding crop genotypes suited to the prevailing conditions of the targeted zones and resource-based technologies under climatic variability. The second approach is to exploit native resources, i.e., varied and untapped land-areas and under-scored horticultural species with vegetable potentialities.

Introduction

Coastal zone represents a broad transitional zone between land and sea which is strongly influenced by both the shoreline ecosystems and the near shore sub-littoral land-based ecosystems. The coastal areas of the country occupy about 10.8 million ha of land and are spread over the 7517 km long coastline along the Bay of Bengal in the East coast, Arabian sea in the West coast and two islands territories. The coastline of the country in its journey covers 9 states (West Bengal Odisha, Andhra Pradesh, Tamil Nadu, Kerala, Karnataka, Maharashtra, Gujarat Goa) 2 union territories (Puducherry and Daman and Diu) and 2 groups of islands (Andaman & Nicobar group in the Bay of Bengal and Lakshadeep and Minicoy group in the Arabian sea) in the country. The region has varied geomorphic and topographical features of mountains, valleys, coastal plains, riverine systems climatic conditions, soil conditions, water budgets and a wide range of cultivated crops. It also supports diverse vegetation ranging from rich tropical rain forests to coastal mangroves and highly rich in biodiversity. The entire coastal ecosystem is highly fragile and vulnerable to climate change and highly endangered by the sea level rise following global warming. Agriculture is the major occupation of the people in the rural areas of coastal regions of the country but it is highly complex risk-prone and entirely dependent on the vagaries of nature.

Since, the problems of coastal agriculture are widely variable there is no universally applicable remedial measure for self-reliant coastal agriculture and it is likely that the remedial measures or the technological interventions will be variable according to the problems associated with the concerned area. It is highly necessary that technological improvement aimed at enhancement of the productivity of coastal agriculture and the livelihood of the farming communities must be simple in use to suit the skill and resource poor farmers and, to be operative at small scale farming as the majority of the farmers are in marginal and small categories with very poor landholdings.

In conventional breeding for genetic upgradation of yield and other desirable attributes of crop plants, favourable assemblages of genes from two or more parents are made to develop a commercial variety. The important steps of this exercise are: locating the right kind of parents that possess the desired characteristics; making crosses between or among them; handling the segregating generations in an appropriate manner so as to identify the required recombinants; stabilizing the recombinants and finally evaluating their performance in a series of trials. This approach has been very successful in the sense that it has provided increments in productivity continuously. In an analysis done by the American Society of Agronomy on the genetic contributions to yield gains of five major crop plants, it was concluded that sorghum yields increased due to genetic improvements at the rate of 1.2 per cent per year between 1950 and 1980. For corn, the corresponding yield increase was 90 kg/ha/year between 1930 and 1980, which is equivalent to a rate of increase of 1 per cent per year. It was also estimated that 70 per cent of the total gains in corn yields are attributable to genetic improvement and 30 per cent of the yield gains are due to non-seed inputs like fertilizers, pesticides and cultural practices.

In India also, the improvement of productivity of the major food, fibre and several cash crops has been very impressive. The success is due to intensive research in plant breeding resulting in the evolution of varieties with very high genetic yield potentials and the concurrent support from other disciplines that has provided the package of practices which help in the realization of the created potential. In all crop plants, where the breeding efforts have been intensive, the phenomenon of plateauing of yields has become apparent. Wheat provides, perhaps, the best example of the situation. Since the 1970s, when the gains from genetic restructuring of the plant type had been established, major yield increases have not occurred. Since the demands of the future will be undoubtedly much larger, and additional cultivable land will not be available, ways will have to be found for a sizable increase in productivity per unit area in the immediate future. This requirement calls for the development of strategies and procedures that will make dramatic yield gains possible. For meeting the challenge, a continuous search is being made for innovative methods which will give yield increments of a much higher order than those provided by the conventional approach. In this chapter, an attempt has been made to introduce some such promising approaches.

Introduction

In a world grappling with the effects of unchecked waste generation, the pursuit of sustainable waste management solutions stands as a paramount challenge (Smith, 2020). In India, agriculture has evolved in its own way, it has sustained livelihood of millions and had transformed from being a food deficit country to a food exported. There were certain accelerated efforts taken in implementation of advanced resources and technology which transformed India to a self- sufficient country. However this irrational application of synthetic inputs has come with a cost,which resulted in generation of substantial amount of waste. Waste can be any residual substance which has lost its value to the original user after a certain period of its utilization(Gupta, 2019). Agricultural waste are the materials that are generated during or after farming activities which either have no use in the original process of production or may have been spoiled or left unused in the right time in certain cases. These waste that are generated during farming can be in solid,semisolid or liquid forms depending on the nature of farming activities. If these agri-wastes are left without proper treatment, they may have certain types of impact on the environment,for instance the pesticide residues may impact the grazing animal health and when the fertilizers volatize and leach causing an ill-effect on the aquatic ecosystem (Yadav, 2019). Certain Agri experts had opinion that these farm residues can be recognized as “resources out of place” instead of byproduct. The holistic management of farm resources with appropriate techniques can help in reutilization of the farm wastes in secondary production sectors thus minimizing resource utilization and intensifying work efficiency.

Introduction
Currently, about 350,000 species of flowering plants have been described under global flora, but only a few of them have been rigorously screened for plant breeding parameters and systematic research accomplished in terms of varietal development. According to the Great Medical Encyclopaedia, medicinal plants are those used as a source of raw material for preparation of medicinal products of natural origin. Medicinal and aromatic plants occupy a pivotal position in the socio cultural, health care and spiritual arena of rural people of India. Medicinal plants contribute significantly to the rural livelihoods for their sustenance and income generation. Medicinal and aromatic plants are being used since ancient time for the treatment of many diseases in traditional and recognized systems of healthcare and for therapeutic, fragrance and flavoring products in pharmaceutical and cosmetic industries besides as sources of natural dye, fat, essential oil, biopesticide, resin, protein, vitamin, condiment, spice, timber, fiber and other useful substances. Medicinal and aromatic plants-based livelihood systems are often mediated by the market forces and/ related directly to employment and income of the poor people.
Based on the research work carried out by International Development Research Centre (IDRC) in South Asia, MAP and other biodiversity-based livelihoods can not only become poverty alleviating but also been made socially equitable and gender balanced. According to the World Health Organization, 80% of people from developing countries depend mainly on traditional medicine for primary health care. India is one of the worlds’ richest sources of medicinal plants comprising of nearly 45,000 species, of which nearly 100 species find major commercial use as per the statistics of National Medicinal Plant Board, New Delhi. In 2017, the estimated global market value of herbal medicine and herbal supplements was in the region of $107 billion (Yao et al, 2019), and not surprisingly, the substantial demand and consumption of these products have resulted in shortages, and in some cases even the exhaustion, of several medicinal plant resources, leading to habitat destruction and the loss of genetic diversity.
Plant secondary metabolites specific to each medicinal herb are derived from the precursors obtained from the primary metabolic processes related to one plant species or related group of species. These metabolites protect plants against plants being eaten by herbivores or being infected by microbial pathogens. They serve as attractants for pollinators and as agents of plant-plant competition and plant microbe symbioses. The rise of chemical taxa of medicinal and aromatic plants can be considered as consequence of biochemical and metabolic processes mostly under genetic control. It is assumed that differentiation of cell is mostly manifested in chemo-differentiation at a molecular level and the fundamental differences of protein present in an organism, between different enzyme systems. Moreover, the identity of a medicinal plant is attributed to the dissimilarities in their metabolic profiling intra specific chemical adaptations influenced by the ecological and geographical conditions. This discrete chemical difference is known as poly chemism that occur in autogamous species like medicinal and aromatic plants

Rajasthan is the largest state covering about 34.2 million hectare geographical area of the country, of which 27.1 million ha (79 %) is under arid and semi-arid sub-tropic hot climate and spread over 21 districts. The land-scape of Aravali range provides boundary for arid western, semi-arid eastern and sub-humid to humid areas of the state. In-spite of several environmental restrictions and bio-physical constraints in most of the parts, the state can be classified into three distinct agro-climatic region i.e. hot arid, semi-arid and sum-humid from horticultural perspective. On the basis of research experiences and SWOT analysis over last two decades for R&D road-map of Rajasthan Horticulture, the classified zones have excellent vegetable development potential with wide and varied opportunities of crops and utilization of resources.