eChapters

Objective
To determine the chemical composition of biomass in terms of cellulose, hemicellulose, lignin, and silica content using standard detergent fiber analysis and acid digestion techniques.
Principle
Chemical analysis of biomass helps in evaluating its structural and compositional characteristics, which influence its thermal behavior, degradation properties, and suitability for bioenergy applications. Biomass primarily consists of cellulose, hemicellulose, lignin, and pentosans, each playing a distinct role in the structure and energy potential of plant material:
Cellulose – A linear polymer of ß-D-glucose units linked by ß-(1?4) glycosidic bonds. It provides tensile strength and rigidity to plant cell walls and serves as the main carbohydrate source in biomass.
Hemicellulose – A heterogeneous branched polymer composed of pentoses (xylose, arabinose) and hexoses (mannose, glucose, galactose). It acts as a matrix surrounding cellulose microfibrils, providing flexibility and binding lignin and cellulose together.
Lignin – A complex three-dimensional polymer made up of phenylpropane units. It is highly resistant to microbial degradation, provides compressive strength, and acts as a natural binder in plant tissues.
Pentosans – Polymers of five-carbon sugars that contribute to carbohydrate storage and structural integrity.

Rapeseed
Rapeseed (Brassica napus L.), a member of the Brassicaceae family, is one of the primary oilseed crops cultivated for biodiesel production, particularly in Europe and Canada (Hoekman et al., 2012; Demirbas, 2009). Its seeds contain 40-45% oil, making it one of the most efficient oil crops for biofuel production (Ramos et al., 2009). The extracted oil is known as canola oil, which is preferred for both food and fuel applications due to its low erucic acid and glucosinolate content (Atabani et al., 2012). Rapeseed (Brassica napus L.), is one of the biofuel species that has achieved global attention, primarily due to its high yield, climatic versatility as well as its low environmental impact than fossil fuels (Singh et al., 2010). The crop is being grown all over the temperate region because its ability to resist cold temperatures and pests is a major advantage for the practice of sustainable agriculture. Moreover, the rapeseed has been positively affected by the development of biotechnology and the utilization of hybrid breeding that has been significantly increasing the oil yield and disease resistance of rapeseed, thus, facilitating the biodiesel production from this plant (Zanetti et al., 2013). Biodiesel from rapeseed has ecological advantages, significantly reducing greenhouse gas emissions by up to 50% compared to regular diesel (Hill et al., 2006). It also supports rural economic development through the diversification of farmer income and diminishing reliance on imported petroleum (FAO, 2021). The increasing price of the biofuel, chiefly supported by sustainable energy policies and reducing carbon footprint policies, is one of the driving factors for increasing demand of rapeseed as global demand for renewable energy sources rises (Euopean Commission 2021).
Sunflower
Sunflower (Helianthus annuus L.) is an important oilseed crop used for biodiesel production, especially in temperate regions like Europe and North America (Demirbas, 2009). The oil content of sunflower seeds ranges from 25-50%, making it a suitable feedstock for biofuel (Atabani et al., 2012). The characteristics of sunflower oil, such as the high content of unsaturated fatty acids, lead to better cold flow properties of its biodiesel (Ramos et al., 2009). In addition, the creation of high-oleic sunflower varieties allowed considerable improvement in oxidative stability and led to the fact that sunflower biodiesel is more suitable for storage and combustion (Dimitrijevic et al., 2017). A second

6.1 Introduction

Biomass pellets are one of the most common types of biomass fuel. It is generally composed of wood waste, agricultural biomass, grasses, and forest residues, and is one of the most popular types of biomass fuel available today. Pelletization of biomass results in significant savings in terms of transportation, and storage, as well as the ease of handling biomass as a whole. In terms of flowability, dense cube pellets are similar to cereal grains in terms of their characteristics of being dense and cube-shaped. Due to their regular geometry and small size, biomass pellets are easily fed through an automatic feed system with fine calibration thanks to their regular shape. Because pellets are so dense, they can be stored in a compact way and transported over a long distance in a rational and efficient manner, because of their density. Furthermore, pellets can also be produced with a low moisture content, even though they are extremely dense. This allows them to burn with a high degree of combustion efficiency due to their low moisture content.

Introduction

Any project is undertaken and an investment is made with expectation of realizing benefits out of it. This applies to projects both in the private domain as also in the public domain. Hence, it is imperative to assess the benefits derived from the project investment over its entire economically viable. The extent to which project contribute to various aims of development (benefits) and make use of scarce resource (costs) can differ widely. A proper project preparation requires an assessment of the various benefits and costs associated with execution of a project. Methods to determine, analyze and assess the relevant benefits and costs of a project are known as cost-benefit analysis. The cost- benefit analysis ensures that all the relevant factors that contribute to a project’s net benefits are systematically taken into account, whether they relate to an individual, a firm, a social group, the public sector or the country as a whole.

There are many tools or criteria for the financial evaluation of projects. However, the important and commonly used evaluation criteria are simple Rate of Return, Payback Period, Net Present Worth, Benefit- Cost Ratio and Internal Rate of Return.

Economic appraisal and evaluation helps the decision makers who are saddled with the responsibility to prioritize measures in a situation with enormous needs and quite limited resources. Government planners as well as donor agencies are all in need of enough data in order to make rational choice or decision in selection of investment alternatives. Most of the economists believe that economic analysis cannot give the final answers. There will always be lack of data, uncertainty about the future, disagreement on the methods, and similar issues. However, economic analysis, if properly done, can indeed be of much help to decision makers.

Biomass briquetting is the process of compressing loose and low-density biomass materials such as sawdust, agricultural residues, and forest waste into high-density, solid fuel blocks called briquettes. The process involves mechanical compression under high pressure using machines like piston presses, screw extruders, or hydraulic presses, depending on the technology used.
The main purpose of briquetting is to increase the density of biomass to improve its combustion properties, handling, transportation, and storage efficiency. In most modern systems, briquetting is done without the use of binders, as natural lignin present in the biomass acts as a binding agent under pressure and heat.
Importance of Biomass Briquetting
Biomass briquetting holds immense environmental, economic, and social importance.
1. Environmental Protection
• Briquetting reduces deforestation by providing an alternative to firewood and charcoal.
• It minimizes air pollution by producing cleaner-burning fuel with lower particulate emissions and sulfur content.
• The process helps in carbon sequestration by ensuring the
sustainable use of biomass.
2. Waste Management
• Agricultural residues like rice husk, sugarcane bagasse, cotton stalks, and sawdust, which otherwise cause disposal problems, are effectively utilized.

Appendix-'E'    :    How can Cummunity Reduce Carbon 
            Footprints

The paper deals with the historical perspective of the tsunamis, much widely discussed Kumari Kandam and Lemuria continent and the palaeo-time series changes on the past continents and oceans, disastrous tsunamis since 16^th century and archeological evidences indicating shore line changes along Tamil Nadu coast.

Keywords: Ancient tsunamis in history, Kumari Kandam and Lemuria, Past shore line changes.

INTRODUCTION

A tsunami is a natural phenomenon consisting of a series of waves generated when water in a lake or the sea is rapidly displaced on a massive scale. Earthquakes, landslides, volcanic eruptions and large meteorite impacts all have the potential to generate a tsunami. The effects of a tsunami can range from unnoticeable phenomenon to large scale devastation.

The term “tsunami” is derived from the Japanese language meaning harbour (“tsu”) and wave (“nami”). The term was coined by fishermen who returned to port to find the area surrounding the harbour devastated, although they had not been aware of any wave on the high seas. A tsunami is not a sub-surface event in the deep ocean; it simply has a much smaller amplitude (wave heights) offshore, and a very long wavelength (often hundreds of kilometers long), which is why they generally pass unnoticed at sea, forming only a passing “hump” in the ocean.

Tsunamis were historically referred to as tidal waves because when they approach land they take on the characteristics of a violent onrushing tide rather than the sort of cresting waves that are formed by wind action upon the ocean (with which people are more familiar). However, since they are not actually related to tides the term is considered misleading and its usage is discouraged by oceanographers.

Abstract

The recent tsunami occurred on 26^thDecember 2004, caused great devastation along the east coast of Tamil Nadu, India. As the said tsunami has caused colossal damages, the impact assessment has become essential for tsunami mitigation measures. In this context, the extent of tsunami inundation, loss of lives, property loss and damages to physical and natural resources have been assessed in the tsunami affected area between Ennore and Mahabalipuram along the east coast of Tamil Nadu.

IRS LISS III PAN merged satellite data and IKONOS data were used for mapping the pre-tsunami geomorphology and land cover conditions and IRS-P6 PAN merged satellite data were used to map the post – tsunami terrain conditions including the inundations. From the study it is inferred that wherever buildings and population are denser the loss is more. Hence, vertical expansion may be needed as an alternative or to supplement horizontal expansion. Bio-shield along coastal areas, involving raising of mangrove forests, planting of casurina, salicornia, palms, bamboo and other tree species and halophytes which can grow near the sea will serve as speed-breakers for the up rising waves.

Keywords: Tsunami, Damage Assessment, Mitigation Measures, Chennai region.

INTRODUCTION

The agriculture in north eastern hill region of India is mainly rainfed in nature and shifting cultivation, known as jhuming, is the dominant farming system. The shifting cultivation is detrimental to both soil and vegetation as it is connected to heavy soil and nutrient losses when practised in steep slopes. The burning and slashing operations are responsible for reduced floral and faunal diversity in the region. It is a well known fact that climate is the main driving factor that governs the sustainability of other natural resources such as land, water and vegetation. So far the NE region gets abundant rainfall for survival of the crops at least during the kharif season. The rainfall starts early March and continues up to the late October. The jhum cultivators follow the rainfall trend and get their field ready for sowing of seeds by early March itself so that vegetative stage of crops gets plenty of rainwater for growth and development. Due to increased population pressure, the hills of NE region are over exploited and the jhum cycle has been reduced from 10-12 years to 4-5 years now-adays. Hence the soils do not get sufficient time to revitalize it and are subjected to more and more exploitation and get degraded permanently.

This chapter presents laboratory procedures for measuring the major physical properties that regulate soil behaviour, water availability, aeration and root development. It begins with particle-density determination using a pycnometer and proceeds to bulk density, soil texture, moisture content, total pore space, porosity and water-holding capacity. Each practical exercise provides the underlying principle, required apparatus, procedural steps, calculations and relevant precautions. The hydrometer method is introduced for estimating the proportions of sand, silt and clay. Methods for evaluating moisture retention and pore relationships are also described. Collectively, these measurements help characterize soil structure, compaction, drainage, water storage and its suitability for crop production.

Abstract

The frequently recurring earth tremors / Seismicities in parts of Tamil Nadu & Kerala and the earthquakes of higher magnitude in Central India in the recent years have gradually dissolved the concept of shield area stability for the South India and the concept of mid-plate seismicity has emerged in the minds of geoscientists, Hence, the geoscientists have embarked into a number of studies to bringout seismotectonic maps for South India. In this context, a detailed studies have been carried out by the authors in parts of westernghats (Kodaikkanal and Varushanad hills) in Tamil Nadu. In the said study lineaments were interpreted using high resolution IRS satellite data and from the lineament pattern, isofracture, lineament density and lineament interaction intensity the strain maxima axes were drawn. Such strain maximas were observed to fall in N- S, E – W and NE –SW directions. These strain maximas were found to coincide with various drainage anomalies, like radial, compressed meandering and eyed drainages indicating that these lineaments are prone for seismicity/ earth tremors.

Abstract

The coastal regions are always tectonically active since these form the junction between the continental and oceanic plates. These tectonic activities and the resultantly tutored fluvial and marine geomorphic processes and the independent fluvial and marine geomorphic processes carve out the coastal morphology. And if these coastal geomorphic features are studied, it will lead to the understanding of the morphotechtonics. One such a study carried out for a part of Ganjam coast, revealed various geomorphic anomalies viz: presence of high order hill ranges only in the north eastern and south western parts of the area with the central plain, northerly migrating Ganjam river, development of wide beach ridges only along the central plain, all indicating the Late Quaternary upliftment of the central plain.

Introduction

The Indian subcontinent is vested with nearly 9,000km long coastline both in its eastern and the western continental margins. These coasts provide unique configuration with convexities (land protruding into the coast), concavities (vice-versa), deltas of different morphologies, beach ridges and swales, bay mouth bars, peaks, serrations and projections in the shorelines, all indicating the vibrant tectonic, fluvial, marine and aeolian processes. As the coastal zones in general, form the boundaries between the continental and oceanic plate margins, these are inherent weak zones prone to tectonic activities, which in conjunction with other geomorphic processes, provide unique architecture to the coasts with above varied geomorphic features. That too, the Indian coasts were inferred to stand as testimony to the vibrant tectonic activities and other related geodynamic processes of the Quaternary period (Ramasamy, 1989; Ramasamy, 1999).

Abstract

India’s climate policy and its stand in the United Nations Framework Convention on Climate Change (UNFCCC) have developed through a complex and contradictory interactions between global pressures to take actions in the field of climate change, India’s foreign policy orientation, its environmental practices and various other national factors. India has been under growing pressure from the major developed economies and also from many small developing countries to play a leading role in mitigating climate change in keeping with its economic and political importance. National factors, including the very important consideration of maintaining rapid GDP growth, favours a conservative approach, with emphasis on expanding India’s share of global climate space. India ranks high on global climate change vulnerability because of its 7,500 Kilometre-long coastline, high dependence of its agriculture on monsoon, decreasing availability of freshwater and over-exploitation of ground water resources, presence of large population in cyclone-prone areas, low lying river deltas and fragile ecosystems like partially submerged lands, and not least, because of melting of the Himalayan glaciers, which feed close to 70 percent of India’s river waters. In 2008, India formulated a National Action Plan on Climate Change (NAPCC) under international obligations. India’s climate policy has always been the preserve of a small group of individuals protected from societal influence and unaccountable to the public at large. Indian policy makers claim to speak on behalf of those very people who have been consciously excluded from democratic and participatory decision-making. The industrialised economies reluctant to own up to their climate obligation only breeds more cynicism within the Indian society. Whatever the outcome of international conventions on climate change or any kind of global negotiations in the immediate future, India cannot afford to give up on the serious issue of climate change.

Keywords: Climate change, Economics, Policy, Agriculture

Introduction
The ecosystem recycles nutrients. Approximately forty chemical elements are thought to be necessary for the existence of living things. The earth’s system contains finite materials, hence the only way to maintain it functioning continually is to regenerate the components.
Definition
The term “biogeochemical cycle” refers to the periodic transfer of elements between living organisms (the biotic phase) and their non-living ,(abiotic) environments, such as rocks, water, and air. These cycles, which primarily involve water, oxygen, carbon, nitrogen, and phosphorus, are essential to life.
While micronutrients like Cu, Fe, and Co are derived from soil-based edaphic cycles, macronutrients like C, H, O, P, K, N, S, Mg, and Ca are cyclized with the atmosphere.There are two types of bio-geochemical cycles: gaseous and sedimentary cycles. The soil serves as the primary reservoir for nutrients in sedimentary cycles, such as the phosphorus and sulfur cycles, while the atmosphere and oceans serve as the primary reservoirs for nutrients in gaseous cycles, such as the nitrogen, carbon, and oxygen cycles. The biotic and abiotic systems are involved in both cycles. Both are fueled by energy flow and connected to either the hydrologic or water cycles.
• The nitrogen cycle, which involves gaseous components, is the naturalprocess by which nitrogen and nitrogen-containing molecules are transformed.

Under normal weather situation, agriculture depends on timely occurrence of rainfall for crop management activities irrespective of different farming situations namely, irrigated and unirrigated agriculture. Changes in temperature and rainfall pattern together with frequent occurrence of extreme weather events are major anticipated threats from the climate change that occurs now around the world. This threat in long run, if not addressed properly, would affect food security of a country. Pratap Narain et al., (2000) observed an increase in moderate and severe drought occurrence numbers in the arid zone of India during last decade (1991-2000) as compared to the earlier decades of the last century. Similarly, Pasupalak (2008) reported daily maximum rainfall of 400.3 mm in the last decade against earlier record of 256.4 mm (1969–78) in a location at Odisha State. Further the inter- annual variation within the decade did increase and also the number of rainy days with very heavy rainfall > 125 mm also found increased in the location against the daily mean rainfall of 20 mm/day in India.

A day may be with heavy rainfall or with bright sunshine or windy or in combination of these. When heavy rainfall continues for more than a week with some system like cyclone, floods may be the result. Similarly, if dry spell continues during a cropping season for more than 15 days, drought would initiate in that region. This is again depending upon the nature of the soil water holding capacity and nature of soils, topography and green cover of that region. In between these two extremes, we have normal season, where we get normal seasonal rainfall during a cropping season. Hence like dress code, in agro-climatology, there are three weather codes, namely floods code, drought code and normal code. The jargon weather code was developed by Dr.M. S Swaminathan in India. Across the countries of the World, if these weather codes occur, the impact would be universal. The strength of adaptation capacity to maneuver these extreme events by the farming community rests with their past experience made for similar situations, financial support and also the technology options that are available from the scientific institutions.

7.1 Importance of Weather Forecast in Agriculture

In India, agriculture is in reality to be a “gamble activity” with the monsoon rain, that means the productivity and profit from agriculture depend upon the goodness of the season. If any malevolent weather situation that happens during a crop season, whether it is at the beginning of the crop season or at the mid of the crop season or at the terminal of the crop season or at the whole of the crop season, the productivity of the crops raised would be under stake. In practice the irrigated crop area is lesser than the area under unirrigated crop in India in any region except the regions where irrigation is routed through perennial rivers. Normally the production from unirrigated crop is 30 to 40 per cent of the same crop grown under irrigated condition in an environment in the same season.

In India, in a region or in a taluk, if the irrigated area is lesser than 30 per cent of total cultivable area, there is every opportunity for the occurrence of food shortage. That means assured production depends upon irrigation rather than managing the crops with seasonal rainfall alone. This clearly indicates that the higher probability of occurrence of crop production risks falls under rainfed/dry land situation. The crop production risk is also common to irrigated area like unirrigated crop but the intensity gets varied. In this context one example that happened in India can be quoted. During December- January of 1982, with the occurrence of heavy rain/snow as a result of prevalence of western disturbance weather system, the wheat crop stood for harvest at Punjab got damaged with a loss of 124 crore of rupees. If this was anticipated earlier through weather forecast development, (which is common in all developed countries) and communicated to the farmers in advance, then the yield loss would have been reduced by following some tactical decisions to be taken either by the farmers or by the concerned Government. At that time, India did not have medium range weather forecast system and hence Indian farmers met with greater losses.

Introduction
Marine Pollution
The pollution of the sea substances that humans have directly or indirectly introducedinto the marine environment, which can have negative impacts on the ecosystem, including health risks to people, obstructions to marine activities, and a decline in the quality of seawater.
It happens when invading species or chemicals or particles or garbage from industry, agriculture, or residential sources find their way into the ocean and can have detrimental impacts.
The majority of maritime pollution originates on land. Nonpoint causes of pollution include wind-blown debris and agricultural runoff.
A great deal of potentially harmful substances stick to small particles, which plankton and benthos animals (most of which are deposit or filter feeders) then consume.
Pesticides swiftly find their way into marine food webs after entering the marine ecology. These pesticides can induce diseases and mutations once they enter food webs, which can be dangerous for both humans and the entire food chain.
Marine food webs may also be exposed to toxic metals. These have the power to alter biochemistry, behavior, reproduction, tissue composition, and growth inhibition in marine organisms. Additionally, a lot of animal diets contain a lot of fish meal or fish hydrolysate. Toxins from the sea can thus spread to land animals and then show up in meat and dairy products.

Farmyard Manure is the manure prepared by using the mixture of dung and urine soaked litter by microorganisms.

Good farmyard manure is one

Introduction

Impact Assessment can be broadly defined as the prediction or estimation of the consequences of a current or proposed action (project, policy, technology). Emergence of EIA can be related to National Environmental Policy Act (NEPA) of 1969 in the USA. This act is now considered as model legislation for implementation all over the world. Today we have more than 100 countries that have adopted EIA legislation. EIA requirements of aid agencies and funding agencies are typically based on the principles included in the NEPA. In any project planning, along with the traditional technical (engineering) and economic considerations the NEPA requires environmental impact considerations. Environmental impact statements (EISs) are prepared as action forcing mechanism in NEPA that describe the environmental consequences of major actions which significantly affect the quality of human environment. Thus, the primary purpose of EIA is to encourage the environmental considerations in planning and decision making process. Finally, it is expected to arrive at actions which are more environmentally compatible.

Salt affected soils occupy 962.2 m ha globally which accounts for 33% of the arable land. In India 8.373 m ha is affected with salts. Of which 2.359 m ha are alkali soils, 3.829 m ha are saline soils and 2.185 m ha coastal saline soils. Reclamation of these soils provides additional area for food grains production and employment.