eChapters

Abstract

The present study was conducted in Jhunjhunun district of Indian Thar desert to evaluate the soil fertility status and impact of different land uses on soil physico-chemical properties. Surface soil samples (0-30 cm depth) from rainfed crop lands, irrigated croplands, Orans (traditional grazing lands) and sand dunes were collected and analyzed for fertility. The pH and EC values of the soils ranged from 7.2- 9.7 and 0.02 – 2.5 dSm,^-1 respectively. The soil organic carbon (SOC) content in the soils varied from 0.03-0.62%, with the lowest average content (0.07%) in sand dunes, whereas average SOC under rainfed crop lands and Orans was 0.13 and 0.15%, respectively. Soils under irrigated crop lands recorded highest values for SOC (0.22%). Phosphorus deficiency was spread in the district across the land uses. However, soils under irrigated crop land showed phosphorus buildup due to carry over effect of continuous use of P fertilizers over a period of time.

This chapter introduces approaches for understanding, assessing, and reducing the vulnerability of forest ecosystems to climate change. It examines the impacts of changing climatic conditions on forests and considers factors such as forest fragmentation, biodiversity, tree density, disturbance, and community dependence on forest resources. The chapter discusses methods and models for vulnerability assessment, including indicator-based and spatial approaches, and explains how vulnerability can be mapped and classified. It also considers strategies for minimizing climate impacts and enhancing forest resilience through appropriate management and conservation interventions.

To many Bio Fertilizer is still an unclear term. Often they are identified as urban and rural organic wastes, plant extracts, organic components etc. However, Bio Fertilizer is mostly commonly referred to the use of soil micro organisms to increase the uptake and availability of plant nutrients.

Bio Fertilizer have gained a good deal of momentum and the industry after a slow start is now gaining more and more importance globally. The major reasons for this are that they:

Rabi : The winter crop season in India from November to April. Main crops grown in rabi comprise wheat, mustard, etc.

Rad : The ‘rad’ is the unit of radiation dose and is defined as the total absorbed dose of 100 ergs of energy per gram of tissue in a unit time.

Radar : An electronic instrument used to detect objects (such as falling precipitation) by their ability to reflect and scatter microwaves back to a receiver. The radar is used for detecting tropical cyclones and monitoring their course as they approach the coast.
 
Radar sonde : A system in which both meteorological and wind data may be obtained, as in radiosonde.

Radiance : Radiant flux per unit area per unit solid angle. Radiance has unit of watts per meter per meter per steradian. The radiance of a perfectly diffuse surface (Lambertian) is independent of the viewing angle.

Abstract

Burkina Faso is a landlocked country in West Africa with a dry tropical climate characterised by a short rainy season and a long dry season. The annual rainfall varied between 300mm in the northern part of the country to 1200mm in the meridian part. Since many years, the degradation of climatic conditions is observed. Therefore, the annual rainfalls of the 1971-1981 period were inferior to those of the precedent periods, and also the deterioration of the climatic conditions led the limits of some ishoteques “isohyète” to move southward, more than 50km farther. Furthermore, the decennial rainfalls since 1920 were subjected to a latitudinal displacement to the south. For example the ishoteque “isohyète” 500mm which were located at the North of the 15°N outside Burkina Faso during the years 1950-1960 moved gradually year by year and reached the 14°N during the years 1970-1980 inside Burkina Faso.

Abstract

Brinjal being native vegetable crop of India possesses rich variability. It is one of the important crops for arid region with limited irrigation water. The large variability in genetic resources available in this crop, provide scope for development of varieties with desirable characteristics such as earliness, high fruit quality and yield, tolerance to high temperature and fruit and shoot borer (FSB).

Abstract

Field experiments were conducted on integrated nutrient management in clitoria at Central Arid Zone Research Institute, Regional Research Station, Kukma-Bhuj, during 2009 and 2010 with four levels of nitrogen (0, 30, 60 and 90 kg ha^–1) and phosphorus (0, 40, 80 and 120 kg ha^–1). In another field experiment, response of clitoria to bio-fertilisers (rhizobium, phosphorus solubilising microbes (PSM) and plant growth promoting rhizobacteria (PGPR) was assessed. Other experiments on standardising micronutrient application, seed rate, spacing and intercropping with grasses were also conducted.

Abstract

Ten genotypes of Cenchrus ciliaris L. were evaluated for seed yield and its components under arid environment prevailing at Jodhpur. The genotypes were grown (using seeds) during July 2010 and three cuts of fodder were taken up to November, thereafter allowed to produce seeds. Fodder of re-growth was finally harvested in June 2011 after seed collection. Analysis of variance showed significant variation among the genotypes for all the characters studied, viz.

Abstract

The area of study extends about 65 km from Gamasa City to Burg El-Burullus. The coastal sand dunes are very near to the shoreline in Baltim and El-Burg and far from the shoreline in Gamasa. It is narrow with relatively steep slope northward near Burg El-Burullus and Baltim, while it increases in width eastward to become wide with gentle slope near Gamasa. The coastal sand dunes are very mobile and move toward the agricultural lands, roads (international coastal road), resorts, and other developmental activities. The sand dunes in the study area are classified into two categories, the old fixed dunes and recent mobile dunes. The main directions of wind blow are N, W, and NW directions. It causes the movement of mobile dunes (Barchan and longitudinal). Several methods have been used for dune fixation like the tar spraying, wind fences and stones. Wind fences are not costly and nonpolluting if compared with stonewall and tar spraying, which prevent the land utilization for agricultural purposes.

Abstract

Sesame (Sesamum indicum L.) is known as the king of oil seeds in India due to the high oil content (50-54%) of its seed. The purpose of this study was to evaluate morphology of sesame under high temperature stress. Seventeen released varieties of sesame (Sesame indicum L.) were studied during kharif 2009 under rainfed conditions. Analysis of variance on ten quantitative and qualitative traits was carried out. The mean, range, phenotypic and genotypic variation, heritability in broad sense and genetic advance were calculated.

Saline Water Agriculture has been drawing interest as one of the solutions for limitation of world fresh water supply, farmland availability, salinity ingression and the pressing future need of food supply. The cultivation of salt-tolerant crops on saline soil and with saline waters has significant social and economic potential.

It is often argued that fresh water agriculture near rivers and ponds was invented because of the need to sustain people and communities. Saline water agriculture is going to be needed for sustaining our future generations and civilization.

Soil is a mass of large variability and thus its sampling is the most challenging problem for any soil analyst. Practically, soil sampling is a two step process which includes (i) collection of soil from homogeneous unit and (ii) processing which in turn includes drying, grinding, sieving, mixing, partitioning and storing.

1.1. Sources of Error in Soil Chemical Analysis

Different sources of error involved starting from soil sampling to chemical analysis of a sample can be divided into three main groups:

1. Sampling error : This error results from variability among the different samples drawn from same soil unit with respect to the objective of sampling.
2. Sub-sampling error : This error is due to variability introduced among sub samples of the same soil sample.
3. Analytical error : This error introduced due to variability from one chemical determination to another on same sub sample.

The climate crisis is one of the most pressing issues of our time, with farreaching consequences for global agriculture, ecosystems, economies, and societies as extreme weather events, shifting rainfall patterns, and rising temperatures threaten crop yields and food security. However, the climate crisis is not a new phenomenon. Its roots can be traced back to the Industrial Revolution, when human activities such as8 burning fossil fuels, deforestation, and land-use changes began to release large amounts of greenhouse gases into the atmosphere. In the 1960s and 1970s, scientists began to sound the alarm about the potential consequences of human-induced climate change. The first climate models were developed, and researchers such as Roger Revelle and Charles David Keeling began to track the rising levels of carbon dioxide in the atmosphere. The 1980s saw the establishment of the Intergovernmental Panel on Climate Change (IPCC), which has since become the leading international body for assessing climate change science.
1.1 Climate Crisis
Despite these early warnings, the climate crisis has continued to worsen. The past decade has seen a proliferation of extreme weather events, from heat waves and droughts to floods and storms. The year 2024 was the hottest on record, with global temperatures averaging 1.55°C above pre-industrial levels (Fig. 1.1). The consequences of climate change are already being felt, from melting glaciers and sea-level rise to devastating wildfires and water scarcity.

Abstract

Before 1960’s, UAE was a poor developing country and almost there were no real signs of civilization. During the 1970’s two important things happened: H. H. Sheikh Zayed Bin Sultan Al Nahyan, the president of UAE, and the other Emirates rulers united together and established the United Arab Emirates and considerable oil findings were discovered. The UAE Leadership has proved to have deep future vision; in three decades the country jumped from a relatively backward scattered emirates to a well developed and civilized country.

Development is very obvious : from tents and sandy tracks to tower buildings and highways, from desert to green belts of palm trees and vegetables in all parts of the country, and most important, education, healthcare and all other services became the best in the region. Urban development was so sharp; someone who left the place 10 years ago can hardly know his location and services in all sectors became the best at the international level. The oil money was properly invested in development.

UAE Air Force Space Reconnaissance, used satellite and aerial images for the past 20 years and successfully utilized images from various sources including aerial photographs, Russian satellites images, SPOT and Landsat

Abstract

The north eastern region of India, consisting of the eight states of Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, Sikkim and Tripura, has an area of 255 090 km2 with a vigorous monsoon dominated climatic and a dynamic hydro-geomorphic regimes. Endowed with a sub-tropical type of monsoonal climate, the region shows remarkable variability of weather and climate on a regional scale. It possesses about 30% of the total water resources potential and about 41 % of the total hydropower potential of India. The per capita and per hectare availability of water in this region is the highest in the country. The problems of environment degradation in the northeastern areas of India are, primarily impacted by demographic pressure, urbanization, natural disasters, soil erosion and land degradation. The region is visited by the southwest monsoons which make it one of the wettest areas in South Asia as well as highly frequented by the water induced disasters. The rapid melting of glaciers is initially expected to first contribute to excessive water flow and flooding in the region. Eventually with the full loss of glaciers, the shortage, when it comes, will likely arrive much more abruptly in time; with water systems going from plenty to want in perhaps a few decades or less.

Abstract

An attempt has been made in this paper to study probability model for modeling of spell distribution & Weather Cycles during the monsoon period (June to September) at Cochbehar, West Bengal. The daily rainfall data of 31 years (1970 to 2000), recorded at Cochbehar have been analyzed. In this study, it was found that daily rainfall during monsoon period follows Markov Chain model. Markov dependent truncated geometric distribution model is best fitted for studying the Dry spells, Wet spells & Weather Cycles during the monsoon period.

11.1 Biodiesel Chemistry

Biodiesel is a mixture of methyl esters of long chain fatty acids like lauric, palmitic, stearic, oleic and so on. It is produced by the transesterification of animal fats and vegetable oils – all of which belong to a group of organic esters called triglycerides. Typical examples are rape/canola oil, soyabean oil, sunflower oil, palm oil and its derivatives, etc. from vegetable sources, beef and sheep tallow and poultry oil from animal sources and also from used cooking oil. The chemistry is basically the same irrespective of the feedstock. The chemistry of biodiesel is given in Fig. 11.1.

Abstract

Pest damage is an age old problem of Indian agriculture. The increased accumulation of green house gases always changes the climatic conditions that have potential effects in increasing pest population.  The insect pests are cold-blooded animals and their body temperature varies with the surrounding temperature. Thus, any change in the climate and weather is bound to influence the activity of pests. The pests are directly influenced by temperature, precipitation, humidity, wind speed and other environmental factors in terms of their occurrence, development, reproduction, distribution, migration and adaptation. In many cases the insect out breaks which classified as gradient out breaks are not self-driven but are entirely dependent on external environmental conditions. For example, the number of aphids has frequently been shown to be correlated with several environmental factors. Such correlations indicate an understanding of aphid out breaks. The increased temperature as a result of climate change has several implications for agricultural pests. These are as follows: (i) changes in population growth rates, (ii) increased number of generations, (iii) extension of development season, (iv) extension of geographical range, (v) increased over wintering, (vi) changes in crop-pest synchrony, (vii) changes in interspecific interactions, (vii) increased risk of invasion by migrant pests, (ix) introduction of alternate hosts, and (x) availability of over wintering hosts.

Introduction

India is believed to be the native of several economic plant species which have spread to various part of the world. While agriculture continuous to stagnate in underdevelopment and insufficiency in food production. India enjoys variable climatic conditions and multiplicity of topographic feature, elevation and rainfall. The climatic conditions and soil type are so diversified that the various combinations of these factors favor unlimited production of a wide variety of crop plants. Now started move and rapid changes are taking place largely as results of bio-technology to advance scientific agriculture. Bio-technological approaches introduction of genetically modified in plant protection. A small percentage of former are well educated on the advantages of scientific forming and are adopting newer technique at limited extent.

2.1. Open source satellite data

The satellite images have been invaluable information sources for Natural Resource Management. They provide synoptic view of the Earth periodically helping in inventory, surveying, and monitoring in agriculture, hydrology, geology, mineralogy, land cover, land use and environment. Free global satellite image data of spatial resolutions of 1m to 1 km and spectral resolution of single band to hyperspectral are available from an increasing number of sources (Table 2.1).