eChapters

For the hundreds of thousands of years that we lived on earth,there were few rapid changes in the atmosphere. It is only in recent times, particularly since the Industrial Revolution, that our activities on earth began to modify our environment in a significant manner.  Industrial pollution has affected the water we drink, the air we breathe, and in general,the biosphere itself.Now noise has joined the bandwagon of pollutants.

Noise certainly comes within the scope of definition of a pollutant that “..... any undesirable change in the physical, chemical or biological characteristics of our air, land and water that may or will harmfully affect human life or that of any other desirable species or industrial process, living conditions or cultural assets, or that may or will waste or deteriorate our raw material resources.”

Soil pollution happens when we destroy the thin layer of healthy and productive soil, which covers the earth’s surface. Most of the world’s food is produced using this resource and if we don’t protect it the world’s farmers will be unable to grow enough food to support the worlds people.
 
Healthy soil depends on bacteria, fungi, and small animals (such as worms) to break down wastes in the soil and release its nutrients which help plants grow. The over use of fertilizers and pesticides can limit the ability of soil organisms to process wastes, which in turn makes the soil less productive or in the worst case scenario useless or even poisonous. 

Water is indispensable for our life. About 2/3 of earth is covered with water. No organism can survive without water. So keeping water free from any pollutant is very important. Water is said to be  “polluted” when it is hanged in its quality and composition directly or indirectly by man’s activity so that it becomes less suitable for drinking, domestic, agricultural or any other purpose. Polluted water transmits a large number of diseases in man. They are cholera, typhoid, dysentery, jaundice and other bacterial or viral diseases.  Water becomes polluted by the presence or addition on inorganic or organic substances or biological agents. Soil erosion, leaching of minerals from rocks, decaying of organic matter are natural sources of water pollution. There has been an alarming increase in the degradation of water quality in the recent past in the large cities and industrial areas.

Water pollution can be studied under the following heads—  (i) medium in which it occurs (surface water, ground water); (ii) habitat (lakes, estuaries and open seas); and (iii) type of pollutants (bacterial, metallic, thermal and radioactive).

The ozone layer is a region in the Earth’s stratosphere where a certain amount of incoming solar radiation is absorbed. Over the last twenty years or so a series of man-made threats to it have been reported and each has been treated  with more gravity than the last. Now a-days such threats feature  regularly on the agendas of international conferences.

Ozone, Positive and Negative : Ozone, or trimolecular oxygen (O3) can be advantageous or exert harmful influence on human health, as well as that of other organisms. It is all depends on whether it is present in the troposphere or stratosphere (Fig. 8.1). In the stratosphere, ozone is a beneficial serving as a shield in screening out most of the damaging portions of ultraviolet radiation which have wavelengths between 290 and 320 nanometers. In the troposphere, ozone is a negative as it appears as a component of smog with a number of deleterious effects, as will be discussed below.

El Nino is the name given to the occasional development of warm ocean surface waters along the coast of Ecuador and Peru. When this warming occurs the usual upwelling of cold, nutrient rich deep ocean water is significantly reduced. El Nino normally occurs around Christmas and lasts usually for a few weeks to a few months. Sometimes an extremely warm event can develop that lasts for much longer time periods. In the 1990s, strong El Ninos developed in 1991 and lasted until 1995, and from fall 1997 to spring 1998.

The ‘greenhouse effect’ earns its name from the rough similarity between the way it works and the way the glass of a greenhouse works. Glass too, is transparent to short-wave radiation but opaque to long-wave radiation, so the greenhouse traps heat.
Carbon dioxide plays a critical role in controlling the Earth’s climate because as an aerosol it absorbs and reflects or scatters incoming radiation on the one hand and absorbs and reradiates outgoing infrared radiation on the other. This latter phenomenon results in what is popularly called the Greenhouse Effect, an analogy to what happens in a greenhouse.

Air is one of the most important constituents of man’s environment. It is calculated that a roan breathes about 22,000 times a day inhaling about 16 kg of air by weight. Air is present everywhere and its entrance from one place to another cannot be checked. Clean and pure air is very essential for the health and survival of man.

Any living organism in its natural habitat is called a wildlife. It may be plant animal or a microbe. The significance of wild life lies in setting up the balance of population in nature by maintaining food chains and food webs. It acts as the gene banks in relation to breeding of plants and animals for introduction of desirable characters such as high yield of economic product and resistance to diseases. The scientists are performing studies to screen and select useful genes in economically important organisms.

Conservation has always been one of the most important applications of ecology.Unfortunately, the term “conservation” suggest “hoarding”, as if the idea were simply to ration static supplies so that there would be some left for the future. In the eye of the general public the “conservationist” is too often presumed to be an antisocial person who is against any kind of “development”. What the real conservationist is  against  is unplanned  development  that breaks  ecological  as  well as human laws. The true aim of conservation, is two fold–
    
(1)     To ensure the  preservation of a  quality  environment that considers esthetic and recreational as well as product needs; and  
    
(2)     To ensure as continuous yield of useful plants, animals and materials by establishing a balanced cycle of harvest and renewal.

“Natural” means an ecosystem not influenced by man and resources means that reserve stock of supply which living things can take from nature for sustenance of life. In reference to man, natural resources can be defined as those natural reserve stocks of supply which man utilizes for his sustenance and welfare. The reservoirs of natural resources are the sun,  the  atmosphere,  the  lithosphere  and the  hydrosphere.  Natural resources include energy, air, water, soil, minerals, plants and animals. The nature of resource depends upon many factors such as scientific and technological development of the society, profession of that particular society, and culture.

We are entering an era when certain environmental conditions will exert a degree of concern which has never been before encountered by man in the course of human history.

The survival of human beings depends on the realisation that they have to live in harmony with the various elements of the environment which are interconnected.
    
(i)     An understanding of the components and processes which takes place in the environment.
    
(ii)     The relationship between different abiotic and biotic components and the assessment of resources with reference to needs of people in a region is essential for their survival.
    
(iii)     A reduction in rate of growth of population in developing countries and a reduction in consumption of resources by developed countries would lead to a balance between population and resources. In this manner, the awareness of the problems faced by environment would enable people to take appropriate decisions. This makes the earth habitable for future generations.

Introduction

Farming and agriculture are respectively defined as the practice of cultivating the land or raising stock and the production of agricultural goods through the growing of plants and the raising of domesticated animals. In the developing countries frantic efforts have been made through research and enlightenment campaigns to encourage farming and thus ensure significant increases in agricultural production in order to feed and sustain the population that is increasing at geometric proportion. At present, the farmers concentrate mainly on crop production which is subjected to a high degree of uncertainty in income and employment to the farmers. In this context, it is imperative to evolve suitable strategy for augmenting the income of a farm.

Abstract

Beekeeping is an agro-based activity which is being undertaken by farmers/landless labours in rural area as an integrated framing practice. It supplements income & employment generation and nutritional intake. Honeybees have been offering services to the society through ensured pollination in crops and providing honey and a variety of other bee hive products viz.; royal jelly, pollen, propolis, bee wax, bee venom, etc. Honey Bees have their vital role in sustaining plants bio-diversity resulting in environmental stability. Mainly five species of honeybees viz.; Apis cerana, A. mellifera, A. florea, A. dorsata, Stingless bees are in used in India.  Beekeeping industry has quadruple benefits: 1) providing self employment to rural and forest based population; 2) production of honey, pollen and beeswax, venom, royal jelly, etc., 3) providing employment to rural educated youths in collecting, processing and marketing of bee/beehive-products; and 4) cross-pollination of various agricultural and horticultural crops and improving their quality and increasing yields.

Introduction

Any kind of garden established on the roof top of building is known as roof garden, which provides the opportunity to cultivate the quality vegetables, fruits and flowers in home. In this system plants and grasses are grown on a nutrition medium placed above a waterproof membrane. Roof gardening is mostly adopted in urban areas. It uses for decorative benefit, roof plantings make available food, manage temperature, hydrological remuneration, architectural improvement, habitats  for wildlife, frivolous opportunities, and in large scale it may even have ecological benefits (Louise, 2009). This considerably increases human health as adding organic cultivation.

Introduction

Earth was a beautiful landscape but man has ruthlessly exploited for his greed specially, in the last century. With rapid industrialization and random urbanization environmental pollution has become a serious problem. Over exploitation of open spaces, ever-increasing number of automobiles and demographic pressure has further aggravated the problem.
 
According to The Hindu, on December 1, 2015 a blanket of smog surrounded Beijing, China, later this smog covered one tenth of China’s area. This situation was recently seen in Delhi, after diwali. It was reported that suspended particulate matter (SPM) content in the air was 14-16 times higher than the permissible limits. So, one of the ways to mitigate this pollution is plating of trees and shrubs as green corridors for abatement of pollution and improvement of environment is an effective way.

Abstract

India is primarily agrarian country and this sector provides livelihood to a major part of the population. The indiscriminate use of agro chemicals since green revolution resulted in adverse effect on the soil fertility; crop productivity; quality of produce and more specifically on the environment system. Organic cultivation is the form of agriculture that relies on techniques such as crop rotation, green manure, compost, and biofertilizers which helps to maintain soil productivity. Organic farming excludes or strictly limits the use of chemical fertilizers, pesticides (herbicide, insecticides and fungicides), plant growth regulators, livestock feed additives, antibiotics and genetically modified organisms. Thus, the importance of organic sources of nutrients was recognized in current scenario in order to get higher yield without disturbing soil health. In this context integrated use of inorganic and organic sources of nutrients in crop production is becoming very crucial for assurance of food security on sustainable basis, which in turn not only improve the soil fertility for sustained crop productivity but also to reduce the cost of inorganic fertilizers.

Abstract

Importance of organic sources of nutrients was recognized in current scenario in order to get higher yield without disturbing soil health. In this context integrated use of inorganic and organic sources of nutrients in crop production is becoming very crucial for assurance of food security on sustainable basis, which in turn not only improve the soil fertility for sustained crop productivity but also to reduce the cost of inorganic fertilizers. Among the various organic sources humic acid plays a major role in the sustainable production of vegetables. Humic acid is a natural bio-stimulant that is derived from leonardite and is among the most concentrated organic material available today. Humic acid is an organic chemical produced by decaying plants and animals residues by a process called Humification. Humic acid is not only increases the yield but also improves the soil fertility, soil productivity, soil structure and texture, promoting plant growth and resistance against various pests, diseases. In this context use of humic acid as organic sources of nutrients in crop production is becoming very crucial for assurance of food security, sustainability and improving soil health.

Introduction

India is bestowed with wide range of climate and physic-geographical conditions and as such is most suitable for growing various kinds of horticultural crops such as fruits, vegetables, flowers, nuts, spices and plantation crops (coconut, cashewnut and cocoa). Its horticulture production has increased significantly over the last two decades and as per the final estimates, by 2013-14, it has increased to about three times (2.87) since 1991-92 and to about twice (1.90) compared to the production in 2001-02. This has placed India among the foremost countries in horticulture production, just next to China. As per National Horticulture Database 2014, during 2013-14, India’s contribution in the world production of fruits & vegetables was 13.6% & 14%, respectively. Total production of fruits during 2013-14 was about 89 million tonnes while that of vegetables was 163 million tonnes.

Abstract

Organic farming is a method of crop and livestock production that involves much more than choosing not to use pesticides, fertilizers, genetically modified organisms, antibiotics and growth hormones. Organic fruit production essentially excludes the use of many inputs associated with modern farming, most notably synthetic pesticides and fertilizers. Organic agriculture, the innovative farming system can build-on and enhance the traditional knowledge and practices of local and indigenous communities. Indigenous Knowledge can be broadly defined as the knowledge that anindigenous (local) community accumulates over generations of living in a particular environment. ITK in fruit production is important for reducing the cost of cultivation, reducing the pollution and also the natural resource base. It is very important to understand these age old practices to address the local problems and to document it before is vanished away.

Introduction : Need to Change

During the era of Green Revolution, India remarkably achieved self-sufficiency in food production with the introduction of high-yielding varieties, extension in the irrigated cultivable land, high use of chemical fertilizer such as Urea and other sources of NPK fertilizers and increase in cropping intensity.During these processes, relative contribution of organic manures as a source of plant nutrients declined substantially. Due to heavy application of chemical pesticides an increase in resistance of insect pests has also been noticed for most of the regular used plant protection chemicals. Health hazards associated with intensive modern agriculture, such as pesticides residues in food products and groundwater contamination are matter of concern. In the progress of green revolution technologies and chemical dependent nutrient management has declined the overall productive capacity of the soil due to no judicious fertilizer use. Such concerns and problems faced by modern-day agriculture gave birth to new concepts in farming, such as organic farming, natural farming, biodynamic agriculture, donothing agriculture, eco-farming, etc. The essential feature of such farming practices imply, i.e., back to nature.