eChapters

ABSTRACT

A satellite based earth observation system enhances our understanding of the entire earth as an integrated system. Remotely sensed data gives accuracy and complete data. To study the coastal zone or area remote sensing is on of the best technology to monitor the regular changes over the time. Here satellite data used to understand the distribution of prawn farms along the Nagappattinam coast. It has stretched from River Coleroon in the north to Point Calimer in south. Nagappattinam coast rocked by tsunami in 2004 and it damaged the whole life of coastal and fishing people. This paper has attempted to analyse the distribution of prawn farms and impact of tsunami in the Nagappattinam coast using remote sensing.

1. INTRODUCTION

Nagappattinam coast is located on the eastern part of Nagappattinam. It is a unique immemorial for its agricultural activities and lying in the deltaic region of Cauvery River. Nagappattinam coast (Fig 1) is peninsular delta area bounded by Bay of Bengal on the east, Palk Strait on the south, and Thiruvarur and Thanjavur districts on the west and Cuddalore on the north. The study area is located between 10^o 10’ N to 11^o 50’ N latitudes and 79^o 45’ E to 80^o 00’ E longitudes. Nagappattinam coast has covered an area of 935 sq. km.

Freezing is among the oldest and most commonly used techniques for preserving food, as it effectively maintains taste, texture, and nutritional value better than other preservation methods. This process leverages the advantages of low temperatures, which inhibit microbial growth, slow down chemical reactions, and delay cellular metabolic activities.
ROLE OF REFRIGERATION SYSTEMS FOR FRUITS AND
VEGETABLES
Proper collection, handling, storage, and distribution of fruits and vegetables are crucial to ensuring they reach consumers in the best possible condition. Refrigeration plays a key role in maintaining freshness and extending the shelf life of these products. Companies involved in production, processing, and marketing that implement efficient commercial and industrial refrigeration systems benefit in several ways:
• Slowing down the ripening and aging of tissue cells.
• Preventing microbial growth.
• Reducing overall quantitative and qualitative losses.

Rubber-roll Sheller consists of two rubber rolls rotating in opposite direction at different speeds. One of the roll is fixed while the other is adjustable to obtain desired clearance between them. The rolls are driven by mechanically. The adjustable roll normally runs about 25% slower than the fixed one. A feeder feeds paddy uniformly to the machine (Fig.27.1). Paddy is fed in thin layer through the clearance between two rubber rolls, rotating in opposite directions at different speed. Difference in speeds of the rolls develops a shearing force on grain surface results in the splitting, breaking and separating the husk from the grains. One part of the husk is subjected to shearing forces whereas the other part in contact with the slower roll is under compression and is thus subjected to breaking forces. Husking is done by the action of these forces. The clearance between them should be smaller than the mean thickness of paddy and may be adjusted subsequently by judging the shelling efficiency. If the gap between rolls is properly adjusted, it can shell up to 95% of paddy fed to it. At decreased gap excess pressure results more breakage of grain and can also cause coloring of shelled rice. During shelling the faster roll should have a peripheral speed of 10 -13 m/ s, while the slower roll 8-10 m/s.

Abstract

Groundwater is one of the major sources of exploitation in arid and semi -arid regions of Rajasthan. To protect groundwater, its data on spatial distribution are important along with quantity. Analysis of quality of groundwater is also very important, because the physical and chemical characteristics of groundwater determine its suitability for agricultural, industrial and domestic usages. The importance ground water increases many fold for arid tracts like Western Rajasthan. Here quality of water is also matter of serious concern. Geostatistics methods are most advanced techniques for interpolation of Groundwater quality. The present study appraises the groundwater quality of western Rajasthan for agricultural purpose with GIS technology. Kriging Raster Interpolation technique of spatial analyst module in Arc GIS software has been used to generate the spatial distribution map of ground water for agricultural purpose. In western Rajasthan only 28% (58109 km2) of ground water falls under the category of good and is suitable for agricultural use. 

INTRODUCTION
The engine of a tractor is often referred to as its heart, as it drives the machine’s ability to carry out essential heavy-duty tasks in farming. As technology progresses and environmental sustainability becomes a key focus, it is increasingly important for Indian farmers in 2025 to understand the workings of tractor engines. This article aims to simplify the intricacies of tractor engines by covering their types, key specifications, performance features, maintenance, and recent innovations.
Tractors typically use diesel engines, which generate mechanical power through the compression and combustion of fuel. These engines are designed with a complex structure that ensures high power output and durability, which are vital qualities for the demanding work tractors are used for. To effectively meet these needs, tractor engines must be both powerful and built to last. These engines function based on the principles of compression and combustion of fuel. Here is a comprehensive analysis of their attributes and significance:
• High force: Tractor engines must produce significant mechanical force to execute diverse agricultural chores such as plowing, tilling, transporting, and other heavy-duty operations. Diesel engines are especially appropriate for this application due to their capacity to generate greater torque at reduced speeds, which is crucial for managing substantial loads.
• Durability: Tractors are frequently employed in severe locations, operating for extended periods under challenging conditions. Diesel engines are designed to endure the demands of continuous operation, making them preferred for agricultural machines. Their durable construction guarantees enduring reliability and longevity.
• Compression and Combustion: Diesel engines operate by compressing air within the engine cylinder. Upon the injection of fuel into this highly

Bunding is a traditional yet effective soil conservation method that involves constructing embankments or barriers along land contours to manage water flow and reduce soil erosion. These embankments, known as bunds, are particularly beneficial in semi-arid and erosion-prone areas, where water conservation and soil stability are essential for sustainable agriculture.
Bunds slow down surface runoff, allowing water to infiltrate the soil rather than washing away valuable topsoil. This not only reduces erosion but also improves soil moisture retention and supports crop growth. Bunds can be made from local materials such as soil, stones, or a combination of both.
TYPES OF BUNDING
There are several types of bunding, each with its unique features and benefits. Let’s explore the most common ones:
Contour Bunding
Contour bunding is a well-established soil conservation technique that involves constructing embankments along lines of equal elevation across sloping terrain. These structures, often equated with level terraces, are designed to intercept surface runoff, thereby reducing soil erosion and improving moisture retention in cultivated lands. Originating as a famine relief initiative in Maharashtra, India, contour bunding has since proven to be an effective and sustainable method for preserving agricultural productivity in hilly and semi-arid regions.
This practice is particularly suited to a wide range of permeable soils, including alluvial, red lateritic, shallow and medium black soils, as well as deep black cotton soils. However, challenges such as soil cracking in black cotton soils may compromise bund integrity, necessitating periodic repair and upkeep.

Terrace farming is a widely practiced agricultural method in India, particularly suited for hilly and mountainous areas. It involves shaping the landscape by carving out flat sections—known as terraces—into the slopes of hills or mountains. These levelled surfaces make it easier to cultivate otherwise steep and challenging terrain. This age-old technique, also known as step farming, creates a series of stepped platforms that resemble a staircase along the hillside. The approach is both practical and resourceful, allowing farmers to use sloped land efficiently for crop cultivation.
The primary motivation behind transforming large hill surfaces into terraces— despite the considerable labor it demands—is to control the rapid downhill flow of water that typically occurs in such regions. However, terrace farming comes with its own set of challenges. The soil on terraces often has limited water retentioncapability, and erosion can become more severe. Nutrients and soil particles tend to be washed away into rivers. In addition, if trees are cleared for farming, the land becomes vulnerable to landslides and mudslides during periods of heavy rainfall. Terrace farming is a prevalent agricultural practice in India, especially in regions characterized by hilly or mountainous topography. This method involves the creation of flat, horizontal plots—referred to as terraces—along the natural contours of slopes. These terraces transform steep, uneven land into cultivable platforms, making farming on such terrain more manageable and productive. Also known as step farming due to its resemblance to staircases carved into hillsides, this traditional technique is both efficient and adaptive. It enables the utilization of sloped land that would otherwise be unsuitable for agriculture. The primary reason for undertaking this labor-intensive process is to manage the rapid runoff of water common in elevated terrains. By interrupting the slope, terraces help slow water flow and reduce surface erosion. Nevertheless, terrace farming poses several challenges. The soil tends to have limited capacity to retain moisture, and erosion can still displace vital topsoil and nutrients. Furthermore, deforestation to create terraces can heighten the risk of landslides and mudflows during intense rainfall.

Abstract

Conventional wisdom holds that variability in rainfall represents a significant variability of agriculture production. But urbanization of the cities on one hand and climate change on theother hand areaffecting the agriculture. Surprisingly, there have been very few analyses exploring the link between rainfall variability and urbanization on agriculture production. Therefore an attempt is made in this paper to know the affect of rainfall variability and urbanisation on the cropping area. For this purposeNDVI analysis is carried out in the catchments of Osmansagar and Himayathsagar Reservoirs by using the medium to high spatial resolution multi spectral data provided by remote sensing satellites, such as Landsat TM, IRS-1C/1D LISS-III and IRS-P6 LISS-III has been used for the years1989, 1994, 1998, 2002 and 2008 for Kharif season, 1975, 1990, 1994, 1998, 2003 and 2008 for rabi season which is collected from NRSC (National Remote Sensing Centre). From this analysis it is found that the increment is more in rabi season compared to kharif season due to the increment of non-monsoon rainfall intensities and ground water withdrawal structures. The increased utilization of the groundwater is causing the reduction of inflows to the reservoirs in the recent years because whatever the rainfall that occurs in the catchment, first utilised for meeting the depleted soil moisture and ground water consequently reducing the surface runoff.

Keywords : Climate change, Urbanisation, Inflows, Cropping area, NDVI

Aim

To study the working principle and cleaning efficiency of air-screen seed cleaner cum grader

Apparatus required

Lab model air-screen seed cleaner cum grader

Seed sample

Weighing balance

The style of technical communication focuses on delivering information clearly, concisely, and accurately, often in a professional or academic
context. Technical communication is typically used in fields such as science, engineering, technology, and medicine to convey complex data or instructions to a specific audience.
Characteristics of Technical Communication Style
• Clarity: The message should be easy to understand without ambiguity.
• Conciseness: Information is conveyed using as few words as necessary.
• Accuracy: The content must be precise and free from errors, especially when explaining technical data.
• Objectivity: The style is factual and free from personal bias or opinions.
• Consistency: Terminology, units of measurement, and formatting should remain consistent throughout the document.
Types of Technical Communication
• Instructions/Manuals: Step-by-step guides for completing a task or operating machinery.
• Reports: Detailed documentation of findings or research.
• Proposals: Formal suggestions for a project or plan.
• Emails/Business Letters: Professional correspondence.
• Presentations: Visual and oral methods of conveying technical information.

The purpose of a sub-surface drainage system is to lower the ground water table and removal of salts beyond the crop root zone. The ground water beyond table may rise due to commonly practiced flood irrigation method, seepage from unlined channels, percolation of rain and runoff water and sub-surface flow from higher areas. Sub-surface drainage consists of drains laid at a specified depth, spacing and grade below the ground surface. The size, spacing and depth of drains depend largely on the soil-water properties viz., infiltration, saturated hydraulic conductivity, drainable porosity; and the requirement of removal of water through drains in certain time period fixed on the basis of rainfall and crop cultivated. The drains are usually placed in a pervious stratum. Suitable filter of coarse sand and gravel may be used when it is placed in a low permeable stratum. Sub-surface drainage serves the important job of removal of concentrated salt solution from the crop root zone particularly in arid and semiarid region.

Advantage of sub-surface drainage system

1. Since sub-surface drainage are underground, no loss of land for cultivation. Some part of the land goes out of use for making drains in surface drainage.

Raster sub-setting is done to select the desired area or bands of the raster image on which the user wants to perform analysis. Raster sub-setting is done in two ways:

Spectral subset: Spectral sub-setting is done to extract few desired bands from the multiband raster image which are required for analysis.

Spatial subset: Spatial sub-setting is done to minimize the area or extent of raster image to the desired area or extent for further analysis.

Raster sub-setting in R is done by functions available in the ‘raster’ package. The following packages are required in this chapter:

Drones have transformed the agriculture sector, altering farming methods by offering advanced solutions for crop monitoring and management. These unmanned aerial vehicles (UAVs) have several applications that improve production, efficiency, and sustainability. Drones help precision agriculture by allowing farmers to collect real-time data on crop health, soil conditions, and field variability. Drones utilize high-resolution imagery and remote sensing technology to identify early signs of pests, illnesses, and nutrient deficits, facilitating targeted interventions. Drones also facilitate irrigation control, seed sowing, and crop spraying, thereby decreasing labor expenses and mitigating environmental impact. Consequently, drone technology is enabling farmers to make better informed decisions, improve resource utilization, and eventually enhance yields.
REAL-WORLD EXAMPLES OF SUCCESSFUL DRONE APPLICATIONS IN AGRICULTURE
Drones are increasingly being used in agriculture across India to boost productivity, ensure efficient resource use, and reduce environmental impact. In recent years, the Indian agricultural sector has witnessed significant adoption of drone technology, which has proven to be a valuable tool for precision farming. Below are some real-world examples of successful drone applications in Indian agriculture:
Precision Farming for Crop Monitoring
In the states of Maharashtra and Punjab, drones are being used by farmers for precision farming to monitor crop health and growth. The drones, equipped with multispectral sensors, capture detailed images of fields and analyze data on crop health, soil moisture, and pest infestations. One example is AeroFarms, an Indian startup that uses drones to monitor fields and help farmers detect early signs of crop diseases and nutrient deficiencies. By assessing the data from drone imaging

Pure sugar when heated melts at about 160-1800c. at about 2100c sucrose loses water and becomes caramel.

Introduction
Sugarcane (Saccharum officinarum Linn.) is a remarkable tall, perennial grass characterized by its thick, jointed stalks and long linear leaves. This remarkable plant, known for its ability to efficiently photosynthesize in warm climates, is a C4 plant. The propagation of sugarcane primarily occurs through stem cuttings, as it seldom produces flowers and seeds. It finds roots in regions with tropical and subtropical climates featuring warm temperatures, abundant sunshine, and well-drained fertile soil (Shukla et al., 2017). Cultivated for its sweet juice, rich in sucrose, sugarcane serves as the primary raw material for the production of sugar, ethanol, and various other valuable products. Its lifecycle comprises several growth stages, including germination, tillering, grand growth, and maturation, culminating in the harvesting of its valuable juice. Continuous advancements in botany and genetics have contributed to the improvement of sugarcane cultivation, enhancing yield and resistance to pests and diseases. The origins and domestication of sugarcane can be traced back to Southeast Asia, particularly in regions encompassing Papua New Guinea, Indonesia, and their vicinity. The domestication of sugarcane is believed to have commenced thousands of years ago when early human populations in these regions recognized the sweetness of the cane and began cultivating it for its edible properties. Over time, through selective breeding and propagation of plants with desirable traits, these early cultivators played a pivotal role in shaping the sugarcane we know today. This indigenous Southeast Asian plant spread to other parts of the world through trade and exploration. Historical records indicate that sugarcane found its way to India around 500 BC and reached China in the 6th century AD. Subsequently, it traversed the Middle East, the Mediterranean region, and eventually reached the Americas during the early voyages of exploration and colonization (Grivet et al., 2004). Christopher Columbus played a significant role in introducing sugarcane to the Caribbean islands during his second voyage in 1493, and from there, it made its way to other parts of the New World, including Brazil and various South American countries. The cultivation of sugarcane emerged as an essential industry in these regions, profoundly influencing their economic and social landscapes. The domestication and widespread cultivation of sugarcane have left an indelible mark on the global economy, trade, and human history. Today, sugarcane remains one of the most significant crops globally, with major producing countries, including Brazil, India, China, Thailand, and others. It stands not only as a pivotal

Sulfate can have harmful effects on aquatic life in freshwaters, sulfate cause osmotic stress or specific ion toxicity in aquatic organisms, especially in soft waters where Ca2+ and Mg2+ concentrations are low. Egg fertilization and early embryonic development were the most sensitive developmental stages of whitefish to sulfate (Karjalainen et al., 2021).
Sulphate (SO4 2-) may be estimated by either turbidimetric or gravimetric methods (APHA, 1995)
1. Turbidimetric method is more applicable in the range of 1- 40 mg Sulphate (SO4 2-)/ L
2. Gravimetric method is suitable if the concentration of Sulphate (SO4 2-) is above 10 mg/ L
Turbidimetric Method (Range 1 - 40 mg/L of sulphate) Principle
Sulphate ion (SO4 2-) precipitated with barium chloride (BaCl2) in an acetic acid medium in order to form crystals of barium sulphate (BaSO4).
BaCl2 + SO4 2-+ BaSO4 (precipitate)
The formation of these crystals is increased in the presence of an acetic acid solution containing sodium acetate, potassium nitrate, acetic acid and magnesium chloride. The suspended barium sulphate (BaSO4) is measured by spectrophotometer and concentration of sulphate (SO4 2-) is determined by comparison of the reading with a standard curve. Minimum detectable concentration is approximately 1 mg (SO4 2-) / L.

Aim: To perform Sumpner’s test (back-to-back test) on a pair of similar transformer and thus calculating efficiency of operation.

Sumpner’s test givens an effective way, to actually see the performance of transformers of large rating without loading them, at full load. This back to back test allows heat run test so that temperature rise and its rate can be analysed.

The two identical transformers are connected back to back as shown in figure such that their polarities are in opposition. To do this, two terminals of the secondary winding are connected as shown and the voltages between the other two are measured by exciting primaries.

Supercritical Fluid Extraction (SFE) is an advanced extraction technology that provides an efficient and comparatively sustainable alternative to conventional solvent-based extraction. This chapter introduces the fundamental principles of supercritical fluids and explains the mechanism by which desirable compounds can be selectively extracted from food materials. It examines the use of SFE for recovering aroma compounds, essential oils, flavours, pigments, colours, antimicrobial compounds and valuable bioactive substances. Particular emphasis is placed on obtaining high-purity extracts while minimizing toxic solvent residues. The chapter also discusses industrial food applications, process advantages and limitations, highlighting the potential of SFE for developing cleaner, efficient and value-oriented food-processing and ingredient-recovery systems.

Supervised classification is the technique to classify raster image in which prior information about the classes in the form of training sites is provided by the user. Training site represents a homogeneous area in a particular class. The spectral response pattern of training sites is used to classify the raster image.The pixels of raster imagewhich have spectral response pattern similar to that of training sites of a particular class are grouped in that class. As there is some variability in the spectral response pattern of a particular class, therefore, multiple training sites per class are taken for supervised classification. Supervised classification of raster images can be performed by various methods. Conventional methods include maximum likelihood classifier, minimum distance to mean classifier, and parallelepiped classifier. Now a days, machine learning algorithms are also gaining importance in this context. These classifying algorithms are first trained or calibrated using the data of training sites.This trained model is then validated on the independent datasets for accuracy assessment. If the accuracy of the developed model is of acceptable level, then that model is used for the classification of raster data.

In this chapter, we are going to discuss the execution of maximum likelihood classifier and few machine learning techniques for supervised classification of raster image in R software. The training sites used in this exercise are in the form of points shapefile. The raster image is classified into six classesi.e. built- up, fallow soil, riverine sand, salt-affected soil, vegetation, and water. For performing this exercise, first of all,set the working directory and import the required packages.

Supply chain logistics involves overseeing the flow of goods and services across the entire supply chain, from start to finish. It encompasses the sourcing, transportation, storage, and distribution of raw materials, manufacturing processes, and final products.
The scope of logistics covers the planning and execution of storing and moving goods between different points in the supply chain. It involves coordinating facilities, personnel, equipment, and other resources to ensure that products are transported as planned and have sufficient space at each point in the supply chain.
Key processes such as demand planning, transportation (including fleet management), inventory control, material handling, and order fulfillment all fall Munder the logistics umbrella. Supply chain logistics is the backbone of global trade, encompassing a wide-reaching network that includes transportation, warehousing, and inventory management systems. This vital aspect of business operations guarantees the efficient movement of products and services from manufacturers to end consumers, passing through various intermediaries along the way.
In today’s fast-paced and constantly changing business environment, understanding and optimizing supply chain logistics has become even more critical. Companies are under greater pressure to deliver products faster, more affordably, and with increased transparency.