eChapters

Introduction

Nematodes are cosmopolitan and ubiquitous in occurrence. These have been reported in all kinds of ecological niche. Accordingly, different kinds of nematode fauna had evolved with distinct morphological features and physiological variability. However, development and perception keep changing with the ambient environment. Agriculture has progressed with leap and bounce as human being has managed this to its maximum utility. The fast changes in agriculture definitely influenced the ecological niche and affected the flora and fauna. Consequently, specific and unspecific kind of relation evolved between host and parasite. With the thumb rule of ecological balance or homeostasis. In the dynamic Mother Nature, multispecies heterogeneous complex is sustained and nature do not perpetuate homogeneity.

Food productivity is decreasing due to detrimental effects of various biotic and abiotic stresses; therefore minimizing these losses is a major area of concern to ensure food security under changing climate. Environmental abiotic stresses, such as drought, extreme temperature, cold, heavy metals, or high salinity, severely impair plant growth and productivity worldwide. Drought, being the most important environmental stress, severely impairs plant growth and development, limits plant production and the performance of crop plants, more than any other environmental factor (Shao et al., 2009). Plant experiences drought stress either when the water supply to roots becomes difficult or when the transpiration rate becomes very high. Available water resources for successful crop production have been decreasing in recent years. Furthermore, in view of various climatic change models scientists suggested that in many regions of world, crop losses due to increasing water shortage will further aggravate its impacts. Drought impacts include growth, yield, membrane integrity, pigment content, osmotic adjustment water relations, and photosynthetic activity (Praba et al., 2009). Drought stress is affected by climatic, edaphic and agronomic factors. The susceptibility of plants to drought stress varies in dependence of stress degree, different accompanying stress factors, plant species, and their developmental stages. Acclimation of plants to water deficit is the result of different events, which lead to adaptive changes in plant growth and physio-biochemical processes, such as changes in plant structure, growth rate, tissue osmotic potential and antioxidant defenses (Duan et al., 2007 and Shakeel et al., 2011).

Orthogonal designs provide an efficient framework for arranging treatments and sources of variation so that their effects can be estimated independently. This chapter introduces contrasts, orthogonal contrasts, and the concept of orthogonality in experimental design. Orthogonality helps prevent the effects of different factors from becoming entangled and facilitates systematic statistical analysis. The chapter discusses three basic experimental designs: Completely Randomized Design, Randomized Complete Block Design, and Latin Square Design. Their principles, applications, and suitability for forestry and agricultural experiments are explained. Examples involving seedlings, tree species, fertilizers, chemicals, wood pieces, and seeds demonstrate how appropriate design selection can reduce heterogeneity and improve experimental precision.

Abstract

Sustainable agriculture or farming is one that contributes to the overall objective ofsustainable developmenti.e. to meetthe present needs withoutcompromising the ability of the future generations to fulfill their own food needs and related demands from the land. A farming system is a complex, interrelated matrix of soils, plants, animals, power, implements, labour, capital and other inputs controlled by farming families and influenced to varying degrees by political, economical, institutional and social forces that operate at any levels. Research witha farmingsystems perspective has variousobjectivesranging fromincreasing the body of knowledge about farming system. The whole farming rather than the individual crops/enterprises need to be considered in the decision making under the farming systems approach. This is a multidisciplinary whole-farm approach and very effective in solving the problems of small and marginal farmers. Farming systems approach in analyzing the problems of agriculture is gaining lot of importance in recent years. Such a study would throw light on the problems associatedwith different farmingsystems and enable theacademicians and policy makers to formulate and implement appropriate policies for a balanced and integrated agricultural development.

A canal of approximate discharge of less than 80 cumecs (3000 cusecs) discharge may be called a medium or low capacity canal).

3.1 Mehboob Section

A Mehboob Section is only a modification of best trapezoidal section by making its complete bottom circular as shown in figure 3.1. Also see figure 1.6 and para 1.7. That is why these canals are also known as canals of zero bed width, or trapezoidal canals with curved bottom, or cup shaped canals.

But these cannot be called as triangular canals with curves, as often spoken. In fact it is a truncated triangle circumscribing the semi circle. Trapezium is also a truncated triangle circum scribing a circle.

More accurately it can be said as a combination of semi circular and best trapezoidal section so as to take full advantage of their hydraulic efficiency and practicability.

This is such a beautiful section that the designer can never commit a mistake, even if he wants to commit a mistake. The dimensions are so geometrically fixed that no one can play with any dimension.

The value of this section was realised for the first time by Er S I Mehboob (1943) in his Punjab Irrigation Branch Paper No.260" Lining of Canals". There after this canal section became well known as Mehboob Section after his name. He also stated that the most economical section i.e. the maximum area for the minimum perimeter is when the centre of the arc is at the full supply line of the section. This is also evident in figure 1.6. This is also the condition for all best hydraulic sections. This section is also useful to a higher silt carrying capacity than a wide shallow one..

11.1 Introduction

The entire amount of water that is diverted at the canal head regulator does not reach at the field for use of irrigation. Major amount of it is lost on way during its movement in the canal systems. During the passage of water from main canal to outlet at the head of the water course, water may be lost either by evaporation from the surface or by seepage through the peripheries of the channel. These losses are sometimes very high, and may go up to 50 % of the total water diverted into the main canal. Evaporation losses are low and may go to a maximum of about 7 percent.of total losses. The major loss of water in the conveyance system is the seepage loss. Seepage loss depends on the channel geometry and evaporation loss is proportional to the area of free surface. In determining the designed channel capacity, a provision of these water losses must be made. The provision for the water lost in the watercourses and in the field however, already made in the outlet discharge factor, and hence no extra provision is made on that account. However, excluding the above two losses, there is operational loss which when added to the evaporation and seepage losses, the total losses goes up the maximum 50 percent level. The operational loss includes spillage, over-toping, leakage through rodent holes, dead storage, initial infiltration and evapotranspiration from the vegetation along the watercourse. Evaporation and seepage losses of the canals are discussed below.

Introduction

Biological control of plant pathogens is currently accepted as a key practice in sustainable agriculture. Plant parasitic nematodes and mycorrhizal fungi are commonly found inhabiting the same soil and colonizing roots of their host plants. These two groups of microorganisms exert a characteristics, but opposite effect on plant health. The potential role of mycorrhizal fungi as biocontrol agent for the control of nematode plant diseases has recently received considerable attention. The literature on the various aspects of VAM research such as interaction of VAM- mycorrhizal fungi with nematode pathogens (Sikora, 1995, Pinochet et al. 1996), biotechnology and future of VAM commercialization (Wood and Cumming, 1992) and trends in mycorrhizal research (Sahay et al. 1998) has been reviewed. The damage due to nematodes diseases is generally decreased in mycorrhizal fungi has shown an antagonistic influence on the population of plant parasitic nematodes (Nagesh et al. 1999, Kantharaju et al.

Introduction
Cocoa, Theobroma cacao L. popularly known as ‘Food of Gods’, the original source of chocolate, is indigenous to tropical humid forests on the lower eastern equatorial slopes of the Andes in South America. Cocoa spread to all over the tropical regions of the world from 18^th century onwards and is now grown in 58 countries covering 6.9 million ha worldwide, producing 4 million tons of cocoa. Cocoa is an important agricultural commodity and the key raw material in chocolate manufacture. Unlike large, industrialized crops, 80 to 90% of cocoa comes from small, family-run farms, with approximately five to six million cocoa farmers worldwide. Total production has increased by 13% from 4.3 million metric tons in 2008 to 4.8 million metric tons in 2012. This represents an average year-over-year production increase of 3.1%. This rate of increase may slow in the coming years, as cocoa trees are sensitive to changing weather patterns. Periods of drought and of excessive rain or wind can negatively impact the yield, and will continue to fluctuate as climate change intensifies. Most of the world’s cocoa is produced in West Africa (70%) followed by Asia and Oceania (15.6%) and Latin America (14.1%). World leaders in cocoa bean production are Ivory Coast, Ghana, Indonesia, Nigeria, Cameroon, Brazil, Ecuador, The Dominican Republic, and Malaysia, supplying 90% of the world production.

Q.1 Factorial experiment is not a design.

Q.2 In factorial experiment, all possible combinations of two or more than two factors are not considered

Introduction
Agriculture is an age-old income generation activity in India. It plays a vital role in India’s economy. One in every two Indians relies on agriculture for livelihood. Over 58% of the rural households depend on agriculture as their principal means of livelihood. Over the period of time, the contribution of agriculture and allied sector in Gross Domestic Products (GDP) in India has declined to 14.4% in 2018- 19 from 51.8% in 1950-51. At current prices, the contributions of industry and services sector are 31.5%, and 54.1%, respectively as against the contributions of industry and services sector were 15.1% and 33.1%, respectively in 1950-51. This decline in share of agriculture and allied sector is result of the shift from traditional agricultural economy to industry and service sectors, this performance are very meagre if we consider the size of the employment in this sector. Presently, more than 50% of the total workforce of the country is employed in agricultural sector contributing to only 14.4% of GDP. With production of agriculture activity 26of $375.61 billion, India is 2nd larger producer of agriculture product in the world after China which has contribution of $991 billion in agriculture sector. GDP of industry sector is $560.97 billion and world rank is 6th. In services sector, India’s world rank is 8th and GDP is $1500 billion (FAENI, 2018- 19). Interestingly, contribution of agriculture sector in Indian economy is much higher (7.4%) than world’s average (6.4%), while contribution of industry and services sector is lower than world’s average (30% for industry sector and 63% for services sector).

Introduction

Plantation crops are high value commercial crops which are broadly classified as estate crops consisting of crops like tea, coffee and rubber and small holders plantation crops like coconut, cashew, arecanut, cocoa etc. Spices especially black pepper, cardamom, vanilla, tree spices like clove, nutmeg, cinnamon and allspice are generally grown as mixed crops in perennial cropping systems. In India, plantation crops including spices are grown in an area of three million hectares and generate an annual income of more than Rs, 5,53,630 million. They are valued for multifarious uses to meet the human needs such as food, oil, industrial raw materials, beverages and confectionary items. Pests and diseases are the major limiting factors in increasing the productivity of these crops. Among the pests, nematodes have got a major role in devastating the pepper plantations by the involvement in slow wilt disease, nematode diseases of cardamom nurseries, root-knot nematode infestation in ginger, turmeric, clove, nutmeg, allspice, lesion nematode infestation in tea, coffee, etc.

Introduction

Coconut is a versatile crop with several uses to mankind. Apart from the main product, the by-products obtained from the coconut crop have many alternative uses, thus, adding to the total value of the crop (Popenoe, 1969). A tremendous scope exists for use of coconut in a variety of non-food products. The development of cottage industries to produce such products is recommended to increase income of coconut growers. For historical reasons, cultivation of coconut and value addition of non-food products from coconut have taken deep roots in the state of Kerala. The rapid expansion of coconut cultivation in non-traditional areas increased the production of coconut and the industry has also developed gradually in the states of Tamil Nadu, Karnataka, Andhra Pradesh and Orissa. Among the non-food products of coconut, charcoal, activated carbon, and shell powder and coir or coconut fibre assume commercial importance. Other parts of the palm especially coconut wood and leaves are recently gaining attention.

INTRODUCTION

In arid and semi-arid regions of India, besides weather aberrations, diseases caused by certain soil-borne pathogens are responsible for low productivity of agricultural crops. In addition to losses caused in annual crops, occurrence of these diseases in forestry takes away a major share. Because of the requirement for free water, diseases of aerial plant parts are much less common than those involving roots when plants are grown in dry regions where humidities are low and rains are infrequent and/or of short durations. Under these conditions, pathogens like Macrophomina phaseolina, Ganoderma lucidum, Cylindrocarpon lichenicola, Neocosmospora vasinfectum, Sclrotium rolfii and species of Fusarium (F. oxysporum, F. solani, F. equiseti, etc.) cause root rots and wilts in many commercially valuable and perennial plants.
Certain agro-climatic factors are attributed for the development of few specific diseases caused by soil-borne plant pathogens. Low organic matter, small microbial population coupled with poor moisture retention capacity of soil favour survival and multiplication of soil-borne pathogens (Fig. 12.1).

Abstract

Molecular markers play key role in crop improvement. There are severalmarkers such as RAPD, SSR, AFLP, SNP, DArT and many more are available for their practical uses. From the past markers like RAPD, AFLP, and SSR have been used extensively in the crop breeding. Recently new markers such as SNP and DArT have become popular among the researchers of molecular biology for use in genomics-assisted crop breeding. These markers have been applied for study of genetic diversity, germplasm management, cultivar identification, genetic mapping, gene tagging and genomics etc. Though the conventional method of breeding willcontinue to play a primary role in the crop improvement, molecular marker technology is becoming one of its integral components. Agarose-based DNA markers like ISSR, CAPS, RAPD, SCAR and AS (allele specific) have the potential for faster and accurate breeding for target traits through MAS.

Communication professionals often reference the Seven Principles of Communication, which, despite not being standardized, provide valuable insights for the Communication Competency within the Microsoft 365 Maturity Model. These principles can be particularly useful for those outside the communication field when developing communication strategies, conducting maturity assessments, or selecting appropriate technologies.

Principles of Effective Communication

1. Effectiveness: Communication must have a clear and purposeful objective. To achieve this, messages should be concise, consistent in tone and content, and engaging. Short, impactful statements often work better than lengthy prose. Visual aids such as diagrams and images enhance clarity and user experience (UX). Each message should culminate in a logical conclusion and a call to action. Effective communication also requires distinguishing between active and passive approaches, emphasizing important notifications while managing their frequency to avoid overuse. Inclusivity is crucial; approximately 10% of the population experiences dyslexia, and generational preferences for different media types (text, audio, video) must be considered. Alternative communication formats should be used to ensure messages are both effective and inclusive.

2. Comprehensiveness: Messages should be thorough and complete, leaving no ambiguity about the information provided. Recipients should have all necessary details to act promptly without confusion or loss of productivity. When communication cannot be completed in a single message, it should indicate when and how additional information will follow. Providing links to supporting materials is recommended.

3. Clarity: Clarity is essential for ensuring the message's purpose is understood by the receiver as intended by the sender. Messages should avoid causing confusion within the team. The format, goal, and language should be clear, and key points should be highlighted using short sentences, the active voice, and bullet points. Readability tools, spell checkers, and grammar checkers are valuable for verifying written communications before publication. Peer reviews or AI-assisted reviews can further enhance clarity.

4. Attention and Style: Effective communication captures the receiver's attention. Given the diversity in behavior, attention, and emotions, messages may need to be tailored for different roles and grades. Senior staff should exemplify the communicated messages, using appropriate messaging tools and processes. While formal communication is standard for conveying important information, informal communication can sometimes be more effective for gauging reactions and fostering engagement. Both communication styles should align with the organization’s ethos—typically positive, honest, respectful, open, and polite. AI tools can be used to check for the desired sentiment and style before publishing important communications.

5. Coherency: Communication often spans multiple tools and formats over time. It is essential to maintain a logical, well-planned, and consistent approach. Messages should connect with the main topic and reflect the company’s values, principles, and mission. Consistency with organizational policies, plans, and objectives is crucial to avoid conflicting messages.

6. Timeliness and Urgency: Communication should be timely and appropriately impactful, ensuring that messages are understood and actionable. It is important to distinguish between urgent and important information and to convey the timeframe for required actions. Confidence in message delivery timing is essential, and mechanisms for retrieving past communications should be implemented.

7. Importance of Feedback: Feedback is vital to confirm the effectiveness of communication, address questions, and clarify actions. Compliance requirements or monitoring functions may necessitate feedback or read receipts.

Introduction
Work study is a quantification method employed for examining a man’s job in an institution. It encompasses two techniques- they are method study and work measurement. With expansion in size along with complexity of organizations it is becoming very difficult to manage the affairs of a company. There is no quantification technique to compute the efficacy of the human work force. A manager can construct good plans about the requirement of goods and services only when he can predict the amount and type of human work force is essential. It is a very common execution from ages in the organizations but these are not providing the satisfactory results. So in order to attain the predicted results efficiently along with standards, organizations started employing work measurement techniques. Fig. 3.1: Work measurement
Meaning
Work measurement denotes quantity of time required for accomplishing a job without comprising in quality the minimum time needed for executing a task is termed as standard or allowed time. So work measurement aids individuals or corporations to enhance their achievement effectively by good plan and execution. It is very essential to employ these techniques because time is a scarce resource. Work study is investigating the human work with respect to physical, physiological, psychological and economical aspects. It investigates the factors affecting the work and workers efficacy and economy to provide necessary suggestions.

Plants are exposed to a wide range of environmental stresses and have to adapt physiologically to these as the local environment changes. Unfavorable soil properties, fertility imbalances, moisture extremes, temperature extremes, chemical toxicity, physical injuries, and other problems are some of the most discussed examples of abiotic disorders that can hamper plant growth which ultimately lead to death of the plants under extreme conditions. Furthermore, many of these abiotic stresses can predispose plants to diseases caused by infectious microbes. These stresses in plants also lead to a series of physiological, biochemical and molecular changes. Impact of biotic stresses on agricultural plants such as wheat, rice, maize, groundnut and many others have been top listed area of interest for researchers but until now, ornamental plants have not been a major object of such studies even though these plants constitute a major part of horticultural production and play an important role in everyday human life.
 
Ornamental plants are an integral part of the urban public places and private gardens. However, these plants are highly sensitive to abiotic stresses, which are known as the most harmful factor concerning the growth and development of these plants. Plant stress implies some adverse effect on the physiology of a plant induced upon a sudden transition from some optimal environmental condition.

2.0. Introduction

Before dealing with the various processes involved in the processing of fruit and vegetables or any food commodity on commercial scale, it is necessary to consider certain important factors such as investment, site, building, water supply, staff, labour etc. which are essential for the successful running of the food processing plant. Processing plant is the premises, buildings, structure and equipment used in the preparation, processing, handling, transportation and storage of any food commodity / fruits and vegetables / the processed products. The design and layout of the food processing plant is of great importance, besides other important factors. The food processing plant may be single storeyed or multi-storeyed depending upon capacity of production and viability of the plant e.g. if the production of the plant is assumed to be small and processing plant have to run only for short duration during the year then single storeyed processing plant can serve the purpose. Plant layout, product layout and process layout are the most important components for setting up of food processing industry and can determine the working efficiency of unit. Sanitary requirements in food processing plant are also important for marketing of the prepared product in national and international market. Sanitary requirement is as important in food processing plant as is the treatment of the effluent waste. For setting up of the food processing plant certain guidelines have been laid out by FPO, 1955.

Earthworms have been on the earth for over 20 million years. In this time they have faithfully done their part to keep the cycle of life continuously moving. Their purpose is simple but very important. They are nature’s way of recycling organic nutrients from dead tissues back to living organisms. Many have recognized the value of these worms. Ancient civilizations, including Greece and Egypt valued the role earthworms played in soil. The Egyptian Pharaoh, Cleopatra said, “Earthworms are sacred.”

Abscission: The shedding of leaves, flowers or fruits as a result of formation of layer of loosely adhering cells at base that breaks apart readily.

Accent: It is created in the garden to avoid the monotonous view. Mostly unusual object like tall fountain, tree, statue etc are used to create the effect

Acre: A unit of measurement of land area equivalent to 4840 square yards or 0.4047 hactare.

Acropetal: Developing sequentially from basal to the apical position.

Acrylic: It is a glassy thermoplastic that is incorporated in rigid plastic to enhance wither ability.

Aestivation: The use of high temperature to promote flowering.

After-ripening: Physiological changes that take place within a dormant seed or bud during dormancy or It is a type of embryo maturation which enables germination of seeds.