Water production functions for irrigated agriculture by Roger W. Hexem

Cover of: Water production functions for irrigated agriculture | Roger W. Hexem

Published by Iowa State University Press in Ames .

Written in English

Read online


  • West (U.S.)


  • Irrigation farming -- Economic aspects -- Mathematical models.,
  • Irrigation farming -- Economic aspects -- West (U.S.) -- Mathematical models.,
  • Production functions (Economic theory)

Edition Notes

Includes bibliographical references and index.

Book details

StatementRoger W. Hexem, Earl O. Heady.
ContributionsHeady, Earl Orel, 1916- joint author.
LC ClassificationsHD1714 .H45
The Physical Object
Paginationxvi, 215 p. : & microfiche (3 sheets ; 11 x 15 cm.) in pocket.
Number of Pages215
ID Numbers
Open LibraryOL4548859M
ISBN 100813817854
LC Control Number77017200

Download Water production functions for irrigated agriculture

Water Production Functions for Irrigated Agriculture. The first four chapters are concerned with the concepts and economic principles of water allocation and production function estimation.

Chapter 5 deals Cited by: Water production functions for irrigated agriculture. Water production functions for irrigated agriculture book Iowa State University Press, (OCoLC) Document Type: Book: All Authors / Contributors: Roger W Hexem; Earl O Heady.

Water production functions for irrigated agriculture 1st ed. by Roger W. Hexem. Published by Iowa State University Press in Ames. Written in EnglishPages: A simple dated water-production function for use in irrigated agriculture.

Get this from a library. Water production functions for irrigated agriculture: Roger W. Hexem, Earl O. Heady. [Roger W Hexem; Earl O Heady]. iii Preface iv 1 Rice and water 1 Rice environments 1 Irrigated lowlands 1 The rice field and its water balance 1 Groundwater under rice fields 5 Rice water productivity 5 Global rice water use 7 Water scarcity in rice-growing areas 8 2 The plant-soil-water system 11 Water.

A production function in which crop yield (Y) is a function of the amount of water received by the crop in terms of rainfall (P) and irrigation (I) can be defined as follows: Y = f (P + I) (1). Download Irrigation Engineering By – Irrigation involves the artificial application of water to soil, usually for assisting the growth of crops in dry areas or where there is a shortage of the process of agriculture becomes increasingly mechanised, the application of scientific methods and technology to the procedure of irrigation.

Equation 1 is a water production function and can be applied to all agricultural crops, i.e. herbaceous, trees and vines.

The yield response factor (Ky) captures the essence of the complex linkages. Estimating Agricultural Production Functions from Experimental Data for Different Crops in Relation to Irrigation, Fertilization and Soil Management in Northern Utah Estimated optimum rates of fertilizer use and water.

crop evapotranspiration. Production functions for crop yield and the field water supply, which includes irrigation at 80% efficiency, effective precipitation, and stored soil moisture depletion, were subsequently determined. Increase of agricultural production on irrigated land 14 Improvement of performance of existing schemes through improved on-farm irrigation technology 15 Demonstration and development of suitable technologies for irrigation.

Water conservation is one of the primary ways that irrigation helps society meet competing demands for water. We are not likely to satisfy increased water demands with new water sources. The costs and environmental effects of development would be prohibitive.

As the largest water user in the United States, irrigation—of agriculture. Dated water-production functions are useful in evaluating alternative irrigation strategies. The dated water-production functions commonly used in irrigation-optimization models are briefly reviewed.

Chapter 7. Nutrient management and water use efficiency for sustainable production of rain-fed crops in the World’s dry areas Bijay Singh, John Ryan, Con Campbell and Roland Kröbel Chapter 8. Challenges of increasing water and nutrient efficiency in irrigated agriculture.

Crop-Water Production Functions Agricultural production is a business operation and irrigation management can be evaluated in context of the business. The goal of any business is to maximize profits.

Poor quality of irrigation water affects both soil quality and crop production adversely (Bello, ). Regardless of its source, Irrigation water contains some dissolved salts (Michael, ). The amount. This report draws on several USDA agricultural production and water-use analyses and surveys, as well as an extensive literature review, to describe the U.S.

irrigated agriculture sector, existing and emerging water demands, trends in water-use effi ciency in irrigated agriculture.

Increasing water productivity is an important element in improved water management for sustainable agriculture, food security and healthy ecosystem functioning.

Water productivity is defi ned as the amount of agricultural output per unit of water. Water is a chemical compound consisting of two atoms of hydrogen joined to one atom of oxygen (H2O). in this write up you shall see The Importance Functions of Water in Plants.

In crop agriculture, water. Efficient application of irrigation water 3. Efficient transport of irrigation water 4. Use of runoff or tailwater 5. Management of drainage water A well designed and managed irrigation system reduces water loss to evaporation, deep percolation, and runoff and minimizes erosion from applied water.

Describes the importance of agricultural water use within a digit HUC as it relates to ecosystems and their benefits. Keywords: Agricultural food production, agricultural water use, irrigation, water availability, water demand, water.

1. Introduction. Irrigated agriculture is essential to meet future food demand in the North China Plain (NCP) which provides about 61% and 31% of the nation's wheat and maize production. To survive more frequent droughts and weather extremes, farms need strategies that can help reduce water use while maintaining income and food production.

Soaker hose irrigation Zmaj88/iStock. (Experimental Agriculture, ) "This book is a comprehensive examination of irrigation with TWW from both agricultural and environmental perspectives, looking at both the advantages and disadvantages of this technology this book is an essential reference for anyone working in irrigation, crop production, and water.

Book Group Author: NA: Abstract: The study uses the concepts of marginal water use efficiency (MWUE), and elasticity of water production (EWP) to reveal the dynamic interrelations of crop yield (Y), seasonal evapotranspiration (ET), and water use efficiency (WUE) based on the functional relation of an ET production function.

Yield and production functions of sunflower (Helianthus annuus) were evaluated under full and deficit irrigation practices with the presence of shallow saline groundwater in a semi-arid region in the Imperial Valley of southern California, USA.

A growing degree day (GDD) model was utilized to estimate the various growth stages and schedule irrigation. The absence of a reliable water supply to farmers is the single most important impediment to food security and agricultural expansion in Afghanistan.

Agricultural water supply and distribution systems are reviewed, and a pragmatic strategy is outlined to increase water capital and to better utilize available water. The development and dissemination of on-farm practices that improve water.

Increased water demands and drought have resulted in the need to provide data to guide deficit water management decisions in irrigated sugarbeet (Beta vulgaris L.) production. The objective of this study was to quantify the yield response of sugarbeet to water input and actual crop evapotranspiration (ETa) on a soil type (silt loam) common to sugarbeet production.

Food and agriculture are the largest consumers of water, requiring one hundred times more than we use for personal needs.

Up to 70 % of the water we take from rivers and groundwater goes into irrigation. Water is a critical input for agricultural production and plays an important role in food security.

Irrigated agriculture represents 20 percent of the total cultivated land and contributes 40. Figure 1 classifies the various types of drainage systems. It shows the field (or internal) and the main (or external) systems. The function of the field drainage system is to control the water table, whereas the function of the main drainage system is to collect, transport, and dispose of the water.

Irrigation Production Functions Reflecting Weather Conditions. Burton C. English September [WP 8] National water production functions reflecting regional weather conditions for corn, cotton, sugar beets, and wheat.

BASIC CALCULATIONS is not meant to be a guide for learning about agriculture and animal hus-bandry in the usual way. It is an 'exercise book' with basic calculations related to agriculture and animal husbandry, and it does not, for instance, try to explain irrigation.

Although irrigation in Africa has the potential to boost agricultural productivities by at least 50 percent, food production on the continent is almost entirely rainfed. The area equipped for irrigation. irrigation efficiency and increase crop production and productivity of irrigated agriculture.

Of course, traditional small-scale irrigation development in Ethiopia has a history of antiquity; while “modern” irrigation. irrigation water by the user is a necessary activity in our existence as a society. Competition for a limited water supply for other uses by the public require the irrigation water user to provide much closer control than ever before.

The importance of irrigated. This study was conducted to develop a water‐production function for grape (Vitis vinifera L.) and to establish plantbased water‐status measurement techniques and critical values that assess irrigation.

Water use efficiency is evaluated in terms of the ratio of dry matter yield to seasonal evapotranspiration. A 5‐year maize irrigation experiment was conducted in which the root zone soil moisture balance and.

The crop water production function (WPF), representing the relationship between crop yield and seasonal irrigation water, is a useful tool for irrigation planning purposes.

The objective of the paper is to propose a methodology to evaluate the optimal seasonal irrigation depth based on the crop production function. Aquifers supporting irrigated agriculture are under stress worldwide as a result of large pumping‐induced water deficits.

To aid in the formulation of more sustainable management plans for such systems, we have developed a water. This study describes a combination methodology to assess agricultural water demand in the Mediterranean region and estimate the CO 2 emissions associated with abstraction (pumping).

It highlights the interactions between water use, food production and energy consumption and focuses on the environmental impacts associated with changes in irrigation .The use of oxygen, hydrogen-2 (deuterium) and other isotopes is an integral part of agricultural water management, allowing the identification of water (and plant nutrients) sources and the tracking of water movement and pathways within agricultural landscapes as influenced by different irrigation .

29575 views Sunday, November 15, 2020