Irrigation & Agriculture
Chemigation Backflow Prevention
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Irrigation & Agriculture
Introduction
The purpose of this guide is to familiarize those injecting pesticides into irrigation systems with the federal government’s equipment requirements on the pesticide label.
The guide will cover the legal requirements as well as discuss practical ways to meet the requirements.
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Related books
The Green Side of the Water Cycle: New Advances in the Study of Plant Water Dynamics
Precision irrigation is becoming a crucial management approach for environmentally and
economically sustainable fruit tree production. The vast majority of fruit crops need irrigation
supply as rainfall does not match crop water requirements (Stöckle et al., 2011; Snyder, 2017).
In most cases of fruit crops cultivated in dry areas, rainfed agriculture is not sustainable and
deficit irrigation (DI) is a reasonable strategy to improve water use efficiency. Fereres and
Soriano (2007) highlighted the benefits of regulated DI as a strategy to reduce agricultural
water use. The main purpose of regulated DI is to reduce irrigation at specific developmental
stages of the crop with no or limited effects on yield. The use of DI in different phenological
stages of fruit crops started in the 1980s by Chalmers et al. (1981, 1986).
The Green Side of the Water Cycle: New Advances in the Study of Plant Water Dynamics
Precision irrigation is becoming a crucial management approach for environmentally and
economically sustainable fruit tree production. The vast majority of fruit crops need irrigation
supply as rainfall does not match crop water requirements (Stöckle et al., 2011; Snyder, 2017).
In most cases of fruit crops cultivated in dry areas, rainfed agriculture is not sustainable and
deficit irrigation (DI) is a reasonable strategy to improve water use efficiency. Fereres and
Soriano (2007) highlighted the benefits of regulated DI as a strategy to reduce agricultural
water use. The main purpose of regulated DI is to reduce irrigation at specific developmental
stages of the crop with no or limited effects on yield. The use of DI in different phenological
stages of fruit crops started in the 1980s by Chalmers et al. (1981, 1986).
Wastewater Use in Agriculture
Introduction
With increasing global population, the gap between the supply and demand for water is widening and is reaching such alarming levels that in some parts of the world it is posing a threat to human existence. Scientists around the globe are working on new ways of conserving water. It is an opportune time, to refocus on one of the ways to recycle water—through the reuse of urban wastewater, for irrigation and other purposes. This could release clean water for use in other sectors that need fresh water and provide water to sectors that can utilize wastewater e.g., for irrigation and other ecosystem services. In general, wastewater comprises liquid wastes generated by households, industry, commercial sources, as a result of daily usage, production, and consumption activities. Municipal treatment facilities are designed to treat raw wastewater to produce a liquid effluent of suitable quality that can be disposed to the natural surface waters with minimum impact on human health or the environment. The disposal of wastewater is a major problem faced by municipalities, particularly in the case of large metropolitan areas, with limited space for land[1]based treatment and disposal. On the other hand, wastewater is also a resource that can be applied for productive uses since wastewater contains nutrients that have the potential for use in agriculture, aquaculture, and other activities. In both developed and developing countries, the most prevalent practice is the application of municipal wastewater (both treated and untreated) to land. In developed countries where environmental standards are applied, much of the wastewater is treated prior to use for irrigation of fodder, fiber, and seed crops and, to a limited extent, for the irrigation of orchards, vineyards, and other crops. Other important uses of wastewater include, recharge of groundwater, landscaping (golf courses, freeways, playgrounds, schoolyards, and parks), industry, construction, dust control, wildlife habitat improvement and aquaculture. In developing countries, though standards are set, these are not always strictly adhered to. Wastewater, in its untreated form, is widely used for agriculture and aquaculture and has been the practice for centuries in countries such as China, India and Mexico. Thus, wastewater can be considered as both a resource and a problem. Wastewater and its nutrient content can be used extensively for irrigation and other ecosystem services. Its reuse can deliver positive benefits to the farming community, society, and municipalities. However, wastewater reuse also exacts negative externality effects on humans and ecological systems, which need to be identified and assessed. Before one can endorse wastewater irrigation as a means of increasing water supply for agriculture, a thorough analysis must be undertaken from an economic perspective as well. In this regard the comprehensive costs and benefits of such wastewater reuse should be evaluated. Conventional cost benefit analysis quite often fails to quantify and monetize externalities associated with wastewater reuse. Hence, environmental valuation techniques and other related tools should be employed to guide decision-making. Moreover, the economic effects of wastewater irrigation need to be evaluated not only from the social, economic, and ecological standpoint, but also from the sustainable development perspective. Pakistan is a case which illustrates this problem. Both treated and untreated municipal wastewater in the vicinity of large cities like Faisalabad is used for vegetable production. But, how safe is this practice? How does one tradeoff between the obvious benefits of this use and the costs associated with it?
Wastewater Use in Agriculture
Introduction
With increasing global population, the gap between the supply and demand for water is widening and is reaching such alarming levels that in some parts of the world it is posing a threat to human existence. Scientists around the globe are working on new ways of conserving water. It is an opportune time, to refocus on one of the ways to recycle water—through the reuse of urban wastewater, for irrigation and other purposes. This could release clean water for use in other sectors that need fresh water and provide water to sectors that can utilize wastewater e.g., for irrigation and other ecosystem services. In general, wastewater comprises liquid wastes generated by households, industry, commercial sources, as a result of daily usage, production, and consumption activities. Municipal treatment facilities are designed to treat raw wastewater to produce a liquid effluent of suitable quality that can be disposed to the natural surface waters with minimum impact on human health or the environment. The disposal of wastewater is a major problem faced by municipalities, particularly in the case of large metropolitan areas, with limited space for land[1]based treatment and disposal. On the other hand, wastewater is also a resource that can be applied for productive uses since wastewater contains nutrients that have the potential for use in agriculture, aquaculture, and other activities. In both developed and developing countries, the most prevalent practice is the application of municipal wastewater (both treated and untreated) to land. In developed countries where environmental standards are applied, much of the wastewater is treated prior to use for irrigation of fodder, fiber, and seed crops and, to a limited extent, for the irrigation of orchards, vineyards, and other crops. Other important uses of wastewater include, recharge of groundwater, landscaping (golf courses, freeways, playgrounds, schoolyards, and parks), industry, construction, dust control, wildlife habitat improvement and aquaculture. In developing countries, though standards are set, these are not always strictly adhered to. Wastewater, in its untreated form, is widely used for agriculture and aquaculture and has been the practice for centuries in countries such as China, India and Mexico. Thus, wastewater can be considered as both a resource and a problem. Wastewater and its nutrient content can be used extensively for irrigation and other ecosystem services. Its reuse can deliver positive benefits to the farming community, society, and municipalities. However, wastewater reuse also exacts negative externality effects on humans and ecological systems, which need to be identified and assessed. Before one can endorse wastewater irrigation as a means of increasing water supply for agriculture, a thorough analysis must be undertaken from an economic perspective as well. In this regard the comprehensive costs and benefits of such wastewater reuse should be evaluated. Conventional cost benefit analysis quite often fails to quantify and monetize externalities associated with wastewater reuse. Hence, environmental valuation techniques and other related tools should be employed to guide decision-making. Moreover, the economic effects of wastewater irrigation need to be evaluated not only from the social, economic, and ecological standpoint, but also from the sustainable development perspective. Pakistan is a case which illustrates this problem. Both treated and untreated municipal wastewater in the vicinity of large cities like Faisalabad is used for vegetable production. But, how safe is this practice? How does one tradeoff between the obvious benefits of this use and the costs associated with it?
Modern Fruit Industry
The effectiveness on several fruits by the application of alternative methods against fungi is summarized in the present chapter. Several investigations have reported the efficacy of these technologies for controlling fungal infections. Currently, high post-harvest loses have been reported due to several factors such as inefficient management, lack of training for farmers, and problems with appropriate conditions for storage of fruits and vegetables. Even now, in many countries, post-harvest disease control is led by the application of chemical fungicides.
Modern Fruit Industry
The effectiveness on several fruits by the application of alternative methods against fungi is summarized in the present chapter. Several investigations have reported the efficacy of these technologies for controlling fungal infections. Currently, high post-harvest loses have been reported due to several factors such as inefficient management, lack of training for farmers, and problems with appropriate conditions for storage of fruits and vegetables. Even now, in many countries, post-harvest disease control is led by the application of chemical fungicides.
Water Productivity of Irrigated Agriculture in India Potential areas for improvement
Abstract
The objective of this paper is to estimate water productivity in irrigated agriculture in selected basins in India; and to identify the drivers of change in water productivity in these regions.
Water Productivity of Irrigated Agriculture in India Potential areas for improvement
Abstract
The objective of this paper is to estimate water productivity in irrigated agriculture in selected basins in India; and to identify the drivers of change in water productivity in these regions.
Soil Water Flow And Irrigated Soil Water Balance In Response To Powder River Basin Coalbed Methane Product Water
In the soil columns experiment, A and B horizon materials from sandy loam, silt loam, and clay loam soils were pre-treated with water having salinity and sodicity typical of PRB CBM water or of Powder River (PR) water currently used for irrigation in the basin. Tension infiltrometer measurements were used to determine infiltration flux, first using pre-treatment water, and subsequently deionized (DI) water, simulating rainwater. Measurements were compared by pre-treatment water, horizon, and soil type. Under pre-treatment water testing, the sandy loam and clay loam soils pre-treated with CBM water exhibited smaller infiltration flux values than when pre-treated with PR water. Only the sandy loam soil showed a greater decrease in infiltration flux with DI water on soils pre-treated with CBM relative to PR water pre-treated soils. There was no difference in infiltration flux decrease with DI water between A and B horizon soils, or between smectite and non-smectite soils.
Soil Water Flow And Irrigated Soil Water Balance In Response To Powder River Basin Coalbed Methane Product Water
In the soil columns experiment, A and B horizon materials from sandy loam, silt loam, and clay loam soils were pre-treated with water having salinity and sodicity typical of PRB CBM water or of Powder River (PR) water currently used for irrigation in the basin. Tension infiltrometer measurements were used to determine infiltration flux, first using pre-treatment water, and subsequently deionized (DI) water, simulating rainwater. Measurements were compared by pre-treatment water, horizon, and soil type. Under pre-treatment water testing, the sandy loam and clay loam soils pre-treated with CBM water exhibited smaller infiltration flux values than when pre-treated with PR water. Only the sandy loam soil showed a greater decrease in infiltration flux with DI water on soils pre-treated with CBM relative to PR water pre-treated soils. There was no difference in infiltration flux decrease with DI water between A and B horizon soils, or between smectite and non-smectite soils.
Recent Advances in Grain Crops Research
Global food security is highly dependent on grain crops, which produce edible dry seeds that serve as a good source of protein, carbohydrates, and vitamins. Being the most critical component of a human diet, it is not astonishing that over 50% of world daily caloric intake is derived directly from grains. These crops are grown in greater quantities worldwide than any other crop and have undoubtedly played a key role in shaping human civilization.
Recent Advances in Grain Crops Research
Global food security is highly dependent on grain crops, which produce edible dry seeds that serve as a good source of protein, carbohydrates, and vitamins. Being the most critical component of a human diet, it is not astonishing that over 50% of world daily caloric intake is derived directly from grains. These crops are grown in greater quantities worldwide than any other crop and have undoubtedly played a key role in shaping human civilization.
Irrigation Engineering
Purpose of Irrigation
Some of the main purposes of irrigation are enlisted below:
1. To supply essential moisture for plant growth
2. Transportation of fertilizers (Fertigation)
3. To leach or dilute salts in the soil
4. To help in field preparation, dust control, etc.
5. Other benefits of irrigation include cooling the soil and atmosphere to create a more favorable environment for crop growth and frost control.
Irrigation Engineering
Purpose of Irrigation
Some of the main purposes of irrigation are enlisted below:
1. To supply essential moisture for plant growth
2. Transportation of fertilizers (Fertigation)
3. To leach or dilute salts in the soil
4. To help in field preparation, dust control, etc.
5. Other benefits of irrigation include cooling the soil and atmosphere to create a more favorable environment for crop growth and frost control.
Standards For Landscape Irrigation Systems
Introduction:
The following Standards for Landscape Irrigation Systems replace the previous publication of March 1997. They have been developed by the Irrigation Industry Association of British Columbia to reflect the current minimum Standards for the industry and to provide guidance to its members as a benchmark for their performance. The principles embodied in these Standards apply to all landscape irrigation systems but the special circumstances of some owners or installations may require the development of more customized specifications related to the project. The use of these Standards is intended to encourage efficient and responsible water management and result in irrigation systems that are economical, practical, and sustainable. Owners, designers, and installers of these systems are responsible for the use of a precious and finite resource to maintain healthy and functional landscapes. Accepted industry practice reflects these goals. The Irrigation Industry Association of British Columbia accepts no liability arising from the use of these Standards in contractual relationships between parties to an irrigation project.
Standards For Landscape Irrigation Systems
Introduction:
The following Standards for Landscape Irrigation Systems replace the previous publication of March 1997. They have been developed by the Irrigation Industry Association of British Columbia to reflect the current minimum Standards for the industry and to provide guidance to its members as a benchmark for their performance. The principles embodied in these Standards apply to all landscape irrigation systems but the special circumstances of some owners or installations may require the development of more customized specifications related to the project. The use of these Standards is intended to encourage efficient and responsible water management and result in irrigation systems that are economical, practical, and sustainable. Owners, designers, and installers of these systems are responsible for the use of a precious and finite resource to maintain healthy and functional landscapes. Accepted industry practice reflects these goals. The Irrigation Industry Association of British Columbia accepts no liability arising from the use of these Standards in contractual relationships between parties to an irrigation project.
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