eChapters

This chapter introduces soil testing as an essential component of scientific nutrient and land management. It traces the establishment and expansion of soil-testing laboratories in India and explains their role in assessing soil fertility, productivity and physical, chemical and biological conditions. Soil testing helps determine suitable fertilizer and amendment requirements while preventing the excessive or unbalanced application of nutrients. The chapter emphasizes that fertilizer recommendations must reflect differences among soils and fields. It also introduces representative soil sampling as the foundation of dependable laboratory results and outlines important precautions concerning equipment calibration, clean glassware, contamination prevention and safe laboratory practices.

Arsenic contamination is one of the serious concerns for public health throughout the world. During the weathering of rocks and minerals, which are followed by subsequent leaching and runoff, arsenic (As) is released into the soil and groundwater. Additionally, human sources can transfer it into the soil and groundwater. Depending on the geological settings, geochemistry, and geo-environmental conditions of an aquifer, different aquifers may have different adsorption and desorption processes, arsenic species, Eh, pH, solid phase dissolutions, and precipitations. Therefore, rigorous geochemical investigation for an adequate understanding of arsenic geochemistry under different hydrogeological and geo-environmental conditions of aquifers is essentially required for evolving sustainable solutions. All of the arsenic affected river plains have river routes originated from the Himalayan region. Arsenic in groundwater contamination has far-reaching consequences including its ingestion through the food chain, which are in the form of social disorders, health hazards and socioeconomic dissolution besides its sprawling movement, and exploitation of groundwater. Food crops produced with arsenic tainted water are marketed to other locations, including areas where people may eat the tainted food and be exposed to arsenic. The arsenic contamination of groundwater is a form of groundwater pollution which is due to naturally occurring high concentrations of arsenic in deeper levels of groundwater.

The Asia-Pacific region is highly vulnerable to climate change, with impacts such as more frequent natural disasters, sea-level rise, floods, droughts, and changing weather patterns. Rural areas, particularly those reliant on agriculture, are disproportionately and non-identically affected. The Asia-Pacific region, home to over 60% of the world's population, is among the most vulnerable to climate change due to its diverse geography, dense coastal populations, and socioeconomic disparities [IPCC, 2022a], Climate change is an emerging threat that affects all countries to varying degrees. The recently released IPCC Assessment Report identified agriculture as one of the critical sectors both susceptible to climate change and contributing to it through Greenhouse Gas (GHG) emissions. Countries in the Asia-Pacific region are investing significant resources to strengthen agriculture on various fronts. These investments focus on the research and development of new varieties and agro-technologies to adapt agriculture to emerging climatic threats and, simultaneously, mitigate GHG emissions from the agricultural and allied sectors. These initiatives are in their early stages, and there is a need to assess the current status of countries' vulnerability to climate change and the measures taken to address

Any perturbation and chaos in ecological setting and its functioning will lead to serious disruptions disruption in both resilience and livelihood. This is exactly what is being confronted by Indian Agriculture upfront. Our soils are brutally extorted to accept the harsh reality that close to 70 per cent of our cultivable land is starving of organic carbon. The ground water depletion in the name of modern agriculture has been another testimony of our ruthlessly prodigal agriculture amounting to serious water crisis. Every five seconds equivalent to a football ground, the golden acres, are vanishing with fertile soil from the chest of the planet. Thus, soil erosion amounting to almost 15 tons per hectare per year in Indian agriculture is not only alarming but also humongous. The losses of biodiversities including floral and faunal counts are adding blistering blistering barrier for our food production system. In the name of green revolution, we turned wrongly illusioned with the ability of so called high yielding varieties and have driven out our valuable landraces to invite gene myopia and gene erosion. This has got a catastrophic consequence. The stagnation of production and productivity in food sector is going to be the bleak indicator of our fragile and frail ecological resilience in the entire production system. But the down to earth reality is that apart from experts, most of our farmers are not aware of this threat, sensitized either. The book has assimilated the data in a delving manner, and real time fact of ground reality that reveals an interesting interpretation of farmers' perception on the rhetoric’s of ecological resilience in India.

A model is something that mimics the behavior of some real system of interest. Our interest here will be in water quality models, which are usually equations, and which predict some result based on factors that influence that result. A water quality model is a representation of a real system. The essence of a good water quality model is that it is simple in design and exhibits the basic properties of the real system that we are attempting to understand. The model should be testable against empirical data. The comparisons of the model to the real system should ideally lead to improved mathematical models. The model may suggest improved experiments to highlight a particular aspect of the problem, which in turn may improve the collection of data. Thus, modeling itself is an evolutionary process, which continues toward learning more about certain processes rather than finding an absolute reality.

Water pollution is a large set of adverse effects upon water bodies such as lakes, rivers, oceans, groundwater caused by human activities. Although natural phenomena such as volcanoes, storms, earthquakes etc. also cause major changes in water quality and the ecological status of water while these are not deemed to be pollution. Water pollution has many causes and characteristics. Increases in nutrient loading may lead to eutrophication. Organic wastes such as domestic sewage and farm waste impose high oxygen demands on the receiving water leading to oxygen depletion with potentially severe impacts on the whole ecosystem. Industrial discharge a variety of pollutants in their wastewater including heavy metals, organic toxins, oils, nutrients, and solids. Discharges can also have thermal effects, especially those from thermal and nuclear power stations, and these too reduce the available oxygen. Siltbearing runoff from many activities including construction sites, forestry and farms can inhibit the penetration of sunlight through the water column restricting photosynthesis and causing blanketing of the lake or river bed which in turns damages the ecosystems the process is called as eutrophication.

Pollutants in water include a wide spectrum of chemicals, pathogens, and physical chemistry or sensory changes. Many of the chemical substances are toxic or even carcinogenic. Pathogens can obviously produce waterborne diseases in either human or animal hosts. Alteration of water’s physical chemistry include acidity, conductivity, temperature, and excessive nutrient loading. Even many of the municipal water supplies in developing countries can present health risks leads to many diseases.

1.1. Meteorology and Climatology
Atmospheric science encompasses the main subfields of meteorology and climatology that are similar in the scientific principles and phenomena being examined, but usually differ by approach, time scale, and application. Meteorology is the scientific study of the atmosphere and weather including weather forecasting. It is an interdisciplinary science that involves observing, understanding and predicting weather conditions likely to prevail well in advance (Fig.1.1). The study of meteorology has been around thousands of years, but significant progress did not begin until the 18th century. Climatology is an atmospheric science that focuses on the processes that create weather patterns and variability. Climatology was developed as a science that is based on weather data recorded at multiple locations for comparatively longer periods, usually for 30 years or more. The study of climatology based on the physical processes is influenced by the geographical features, topography and interaction between land and oceans.
1.2. Agricultural Production
Life demands food. The production of food depends upon 4 major factors that are soil, genetic material, management practices and weather. Over a period of time, formers have evolved the cropping strategies based on their local knowledge and experience on the changes in weather within a cropping season. With rapid advances in agricultural sciences, several new varieties of crops were developed, appropriate soil and water management practices were evolved and suitable measures for reducing abiotic and biotic stresses on crops were identified. However, the recent threats of climate change due to increased atmospheric

While fertilizer injectors that mixes fertilizer solutions with the irrigation water flow in the micro irrigation systems, a scientifically prepared fertigation schedule is the software that farmers need to implement a successful fertigation plan.

Though water soluble fertilizers are a special grade of fertilizers manufactured for fertigation per se; I have been assisting farmers to do fertigation with conventional fertilizers, those are familiar to them; like Urea for N, white muriate of potash (MOP) for K. Only in the case of P source they need to acquire water soluble special fertilizers like Monoammonium Phosphate (MAP) or Phosphoric acid. Historically, fertigation by our small holder farmer began in India just by fertigating Urea alone. And applying P and K as direct dry application to the soil with Single Super Phosphate (SSP) or pink MOP, both are not water soluble. Gradually, when farmers realised that fertigation is giving them more yield of the crop and income they warmed up to the idea of full fertigation and demand for water soluble fertilizers like MAP, White Potash, SOP etc. grew.

Soil is the most fundamental resource to fulfill basic requirements of food, fiber and shelter of human race. Although soil is perceived as something of insignificant value and it is considered as dirt but humans cannot survive without soil. Soil forms
basis for all terrestrial life. Soil provides a wide range of ecosystem services (Table 1) that make humankind to survive and progress.

The magnitude and trajectory of changes in ecosystem services and functioning have been as conspicuous as has never been until before 1980’s in this subcontinent. Both the services and resilience of agro-ecosystem, the pivotal for agricultural production and security have been disrupted in the name of modernization of agriculture as well as commercialization.
The impact of green revolution in India, that look place during 1960’s and 1970’s have started eroding very fast and as the consequence of this green revolution, the ground water depletion has gone to the worst, it is contaminated either. 40 % of ground water in Punjab has been moderately or severely contaminated leaving agriculture a coercive proposition both from economic and ecological perspective. 10-15 tonnes of top soil are being eroded per hectare per year in its wrong welcoming to farm mechanization process. Most of the highly yielding varieties which did the ‘magic revolution’ now has been fatigued or segregated either. The social-ecological impacts on agriculture perhaps have been both disruptive and deleterious. Due to unabated fragmentation of holding which again is tiny in size, has initiated another problem of resource and energy wastage, bad enough to add to an ecological disruptions.
With a non-denial to the gleaming success of green revolution, which ensured us with much awaited food security and self-reliance, has its intrinsic weakness and coercion as well.

1.1. Background

Once this beautiful planet conceived human civilization with the glory of motherhood, the birds kept on twittering in an ecstasy of joy and freedom; the ripples of pristine rivers, blue and giggling, offered shelter to silvery fishes and pink Amazon Lilies! But human greed has defeated its own needs. So, what had been a means to survive now has turned into tools to triumph, rather, a weapon to destroy her own creation. By this time, we have transformed fertile lands into a barren Arizona, deep forests into a nasty slums and blue rivers into a filthy stream, called Yamuna.

The advent of the Anthropocene, implies that an unprecedented era of human impact on the natural environment, is now so large that the Earth has entered a new geological epoch; it is leaving the Holocene, the environment within which human societies themselves have developed (Gornish and dos Santos, 2016; Reynolds, 2021). Climate change is a prominent sign of human- driven changes to the global environment. There is every reason to be alarmed about anthropogenic climate change, pollution, and biodiversity loss, all of which have been accelerating in recent decades and do pose “existential crisis” (Díaz et al., 2020; Abhilash et al., 2021). Sixth Assessment Report of Intergovernmental Panel on Climate Change (IPCC) released on February 28, 2022, paints a troubling picture as limiting global warming to 1.5oC (a global target in the Paris Climate Agreement) is not safe for all. If warming exceeds 1.5oC, even temporarily, much more severe, often irreversible effects of climate change will occur, land and ocean temperature change, sea level rise and ocean acidification, loss of Arctic Sea ice and ice sheets, stronger storms, longer heatwaves and droughts, abrupt precipitation mainly intensity and seasonal distribution, thawing permafrost and more (IPCC, 2013). On the basis of the Sixth Assessment UN Secretary-General António Guterres said “The alarm bells are deafening, and the evidence is irrefutable: greenhouse gas emissions from fossil fuel burning and deforestation are choking our planet and putting billions of people at immediate risk.” According to the United Nations (2015), there are still 836 million people in the world living in extreme poverty (less than USD,1.25/ day). And according to the International Fund for Agricultural Development (IFAD), at least 70% of the very poor live in rural areas, most of them depending partly or completely on agriculture for their livelihoods. It is estimated that 500 million smallholder farms in the developing world are supporting almost 2 billion people, and in Asia and sub-Saharan Africa these small farms produce about 80 percent of the food consumed (IFAD, 2011). The rural poor often depend partly on forests for their livelihoods (World Bank, 2002). It is estimated that between 660 and 820 million people (workers and their families) depend totally or partly on fisheries, aquaculture and related industries as a source of income and support (HLPE, 2014).

Meteorology is derived from the Greek word meteoro which means above the earth’s surface; i.e., the atmosphere. The state of the atmosphere experienced at a given time, in any location on the surface of the earth is known as weather. Thus meteorology is the scientific study of the atmosphere or the weather. It is a branch of physics dealing with atmosphere and it is often quoted as the ‘physics of the lower atmosphere’. The main focus of meteorology is to understand the weather processes and forecast the weather. Solar radiation, the air mass and moisture are the three key ingredients that make up weather. The exchange of heat, moisture and momentum between the earth’s surface and the atmosphere determines the characteristic of weather. The observable weather events are known as meteorological phenomena and are defined by a set of variables called weather elements. Atmospheric temperature, atmospheric pressure, humidity, precipitation, cloudiness, wind and visibility, etc. are examples of such weather elements. The weather elements are not separate entities. They are closely related with each other and are highly variable in nature. Meteorology explains and analyses the changes of these weather elements.

METEOROLOGY

The major subdivisions of meteorology are dynamic meteorology (or atmospheric dynamics) and physical meteorology (or atmospheric physics). The dynamic meteorology is concerned with the analysis and interpretation of the three-dimensional, time-varying, macro scale motions and energy transformations in the atmosphere. The science of dynamic meteorology is meant to develop models based on the hydrodynamic and thermodynamic equations. The physical meteorology is concerned with the processes that alter the physical properties and the chemical composition of air parcels as they move through the atmosphere.

Dr Chauhan is a name that resonates with compassion, innovation, and an unyielding commitment to animal welfare. With a career spanning over three decades, he has emerged as a towering figure in the field of veterinary medicine, touching the lives of animals and humans alike through his groundbreaking work and empathetic approach. His exceptional dedication to the health and well-being of cows has earned him the affectionate nickname “Cowpathy Man,” a testament to his pioneering efforts in bovine healthcare, conservation of indigenous cows and his relentless advocacy for these gentle creatures.
From a young age, Dr. Chauhan displayed an innate connection with animals. Growing up in Aligarh, U. P. surrounded by rural landscapes and farm animals, he developed a deep appreciation for the role of cows in sustaining communities. This early bond shaped his career path, guiding him toward Veterinary Medicine with a special focus on bovine health. After earning his veterinary degree, he embarked on a journey that would not only establish him as a leading expert in the field but also as a passionate advocate for the humane treatment of animals.
Dr. Chauhan quickly rose to prominence due to his innovative approach to Veterinary care. While he treated animals of all kinds, his work with cows became the cornerstone of his career. Recognizing the cultural, economic, and ecological significance of these animals, he delved into research on common bovine diseases, nutrition, and sustainable farming practices. His dedication led to the development of innovative diagnostic protocols, treatment and preventive measures, improving the health and productivity of cows across the region.

1.1 Weather Forecasting
Farmers have always been at the mercy of the weather, and accurate forecasting has become an essential tool for their decision-making process. Weather forecasts play a critical role in supporting farmers’ decision-making processes, from crop planning and management to harvest planning and economic decision-making. Crop planning and management is one of the key areas where weather forecasts are crucial. Farmers use weather forecasts to determine the best time to plant seeds, taking into account temperature, moisture, and sunlight requirements. This enables them to choose crops that are suitable for the predicted weather conditions. Additionally, forecasts help farmers optimize irrigation, reducing water waste and ensuring crops receive adequate moisture (Fig.1.1).
Weather forecasts also help farmers mitigate weather-related risks. Extreme weather events like floods, droughts, heat waves, and storms can have devastating effects on crops. Accurate forecasts enable farmers to prepare for and respond to these events, reducing crop damage and loss. For instance, forecasts help farmers take measures to protect crops from frost and freeze damage, which can be catastrophic for certain crops.

Migration is inevitable in the process of economic development (Afsar, 2003; Ballard, 2005). There exists a two-way causation between migration and economic development. Migration induces economic development while economic development induces further migration. Migration can be two types: international migration and internal migration. International migration deals with migration across the countries of the world, while internal migration deals with migration within the national boundary of a country (Zohry, 2005). There are four streams of internal migration which are rural-rural, rural-urban, urban-rural, and urban-urban. Among these four streams, rural-urban migration has certain distinct characteristics which affect developmental aspect of both places involved namely, place of origin and place of origin and place of destination. It is well known that developmental disparities between rural and urban triggers rural-urban migration. People generally migrate from less developed rural countryside to more developed urban centers they left farming and engaged in modern works which are more profitable and low risk oriented (Bhattacharya, 1993; de Haan, 1997). The impact of migration can be assessed in several ways; therefore welfare impacts, social impacts, economic impacts etc. For example, remittance send by the urban migrants to their native villages help them to evade poverty; increase consumption; invest more in agriculture, education, health. Remittances have certain social impacts as well.

India, the second most populous country in the world after China, is trying hard to provide basic needs like food, shelter, clothes, electricity and education facility to its 1,316 million people and to upgrade itself from the stage of ‘Developing economy’ to ‘Developed economy’. Table 1.1 depicts the trend of population increase from 1154 million to 1316 million during 2009 to 2018 with diminishing growth rate from 1.42% to 1.12%. Growing demand of ever increasing population has been met so far by over exploiting natural resources like land, water, fossil fuels, forests and mineral resources which resulted rapid unplanned urbanization, quick depletion of fossil fuels, more and more waste generation, alarming increase in environmental pollution, deforestation with loss of plant and animal species, desertification of cultivable land due to soil erosion, soil contamination & soil salinity and increase in health diseases due to malnutrition, starvation and environmental pollution.

The Indian agriculture is characterized by agro-ecological diversities in soil, rainfall, temperature and cropping system. Besides favorable solar energy, the country receives about three trillion cubic meter of water from rainfall. Of the total geographical area of 329 million hectares the net sown area has remained at about 140-142 million hectares during the last 40 years. The gross cropped area however has increased to about 200 million hectare in 2011-2012 (Anonymous, 2013). The total operational holding is estimated at 105 million with average size of the holdings of 1.6 ha. The Indian agriculture is not only characterized by small fragmented land, but also hill farming and shifting cultivation are also practiced. Out of an estimated 142 m ha net cultivated area around 40% is irrigated and rest is rain fed. About 65% of the population depend upon agriculture for their livelihood.

Soil is a natural resource that exists on the planet much before the existence of mankind on it. The human relationship with soil throughout the history of mankind has marked its ability of crop production and influenced the success of civilisation. Such relationships also affirm soil as the foundation of agriculture and food security, supplying all the essential ingredients to plants, as fundamentals to life on planet, and support various biogeochemical cycles on earth’ s terrestrial ecosystem. Prosperity of human society depends on the utilisation of planet’ s resources in creative and productive ways. Of these resources, soil has gained much importance as it provides human to sustain themselves with their capacity to food production, to make significant contribution towards biodiversity and other ecosystem services that are vital for the functioning and resilience of earth’ s environment. Soil occupies a pivotal position in the environment to maintain its quality.

India is basically an agrarian economy where 57.8% of rural households are engaged in agriculture (Situation Assessment Survey of Agricultural Household, 2021). 48.9 per cent of the Indian work force is employed in the agricultural sector, (ILO, 2016). The estimated Indian population for the year 2050 is 1.7 billion which will raise our food demand to ∼400 million tonnes (Rao et al., 2018). In this context, Indian agricultural production system will have to take up the challenge to feed l7.5% of the global population with only 2.4% of land and 4% of the available water resources at its disposal.

Agriculture depends mainly on natural resources like land situation, soil, water and a favourable climate. Continuous agricultural practices adopted without conservation of such precious resources may lead to unsustainability of growth in agriculture. Conservation of these resources and their sustainable use with appropriate measures would be required for a sustainable agriculture.

Crop production broadly depends on the fertility of the soil where a crop is raised. There are several factors like the kind and quality of seed, climate, water supply, and plant protection measures etc. that affect the crop production. Among these factors, the fertility status of the soil largely determines the ultimate yield even if all these factors are optimum for crop production. A clear distinction should be made between soil fertility and soil productivity. Soil fertility deals with the inherent capacity of soil to provide nutrients in adequate amounts and in proper balance, for the growth of specified plants when other growth factors such as light, water and temperature, and the physical condition of the soil are favourable. Soil productivity is concerned with the capability of soil to produce a specified plant or plant parts or a sequence of plants under well defined and specified systems of management inputs and environmental conditions, viz. climatic conditions. It does not mean that a fertile soil is always productive. A fertile soil, under a bad management system, may be unproductive for a crop. In this book, plant nutrient elements and their available forms, functions and deficiency symptoms are briefly described for the better understanding of soil testing and fertilizer recommendation.