2 edition of Crop-water production functions found in the catalog.
Crop-water production functions
Paul G Hoyt
1984 by U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division in [Washington, D.C.] .
Written in English
|Statement||Paul G. Hoyt|
|Series||ERS staff report -- no. AGES 840427|
|Contributions||United States. Dept. of Agriculture. Natural Resource Economics Division|
|The Physical Object|
|Pagination||19 p. :|
|Number of Pages||19|
Book Group Author: NA: Abstract: The great challenge of the agricultural sector in countries located in arid and semiarid regions faced with severe water scarcity is to produce more food from less water. This may be achieved by increasing the crop water productivity (WP). A new set of maize K co and K cr values under rainfed, limited, and fully irrigated settings were developed as a function of the thermal unit and days after emergence. The midseason average K co values were , , , , and for the FIT, 75% FIT, 60% .
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Simulated crop-water production functions for several crops when irrigated with saline waters (Hilgardia) [John Letey] on *FREE* shipping on qualifying : John Letey. The crop water production function developed in this research can be used to predict the effect of water stress on yield loss and consequent farm profit loss, which is essential in planning for.
Crop-Water Production Function Model for a Saline Irrigation Waters, Soil Science Society of America Journal, 49, pp. – CrossRef Google Scholar Letey, J. and Dinar, A, Cited by: 6. The book presents articles on irrigation scheduling and applied timing criteria; the problem of energy utilization and management in irrigation; and the relationship between irrigation requirements and crop response in terms of crop-water production functions.
The text also includes articles on the development and prospects of irrigation in Australia, as well as the application of a plant-environment Book Edition: 1. Water Use in Crop Production will enable you enhance crop quality and quantity and save one of the earth's most important resource.
Comprehensive and thorough, this essential book combines two vital needs, food and water, and examines Crop-water production functions book must be done in order to keep up with the ever-growing human population.
Crop water production function is the relationship between obtained marketable yield and the total amount of water used by plant through evapotranspiration. Different mathematical expressions have been derived from field experiments to predict yield knowing water use.
Such expressions provide a powerful tool in water allocation optimization. CROP-WATER PRODUCTION FUNCTIONS 63 (2) Another measure of desirability frequently encountered in the irrigation literature is that of maximum water use efficiency. Maximum water use efficiency is said to exist when the crop yield per unit of water input is by: Crop‐water production functions were computed for tall fescue (Festuca elatior arundinacea L.) for various levels of salinity in the irrigation water.
A comparison was made between calculated and published experimentally measured values of leaching fractions and yields of tall fescue grown under conditions of various irrigation water.
Crop-water production functions (CWPFs) are a useful tool for irrigation planning, but derivation of CWPFs by field experimentation is expensive, and traditional analytical techniques are not well suited to derivation of by: This publication is intended to provide guidance in determining crop water requirements and their application in planning, design and operation of irrigation projects.
Part presents suggested methods to derive crop water requirements. The use of four well-known methods for determining such requirements is defined. Water Use in Crop Production will enable you enhance crop quality and quantity and save one of the earth's most important hensive and thorough, this essential book combines two vital needs, food and water, and examines what must be done in order to keep up with the ever-growing human population.
de Juan, J.A., Tarjuelo, J.M., Valiente, M., Garcia, P.: Model for optimal cropping patterns within the farm based on crop water production functions and irrigation uniformity I: Development of a decision model.
Agricultural Water Managem – () CrossRef Google Scholar. Crop-water production functions are estimated for corn, soybeans, and sugar beets grown in Colorado with two irrigation efficiency levels.
Farmers with high-cost water can conserve water and increase profits by applying profit- rather than yield-maximizing water quantities if crop prices are low. Application efficiencies.
have a greater effect on profits at high water costs, but a greater. Crop-water production functions [microform]: economic implications for Colorado / Paul G.
Hoyt; Crop-water production functions and economic implications for the Texas High Plains region [microform] Crop-water production functions and economic implications.
The seasonal model is particularly useful in producing crop‐water production functions which account for both salinity and irrigation uniformity for conditions where the water table does not contribute significantly to the water supply of the crop.
Get this from a library. Crop-water production functions and economic implications for the Texas High Plains region. [Paul G Hoyt; United States. Department of.
Get this from a library. Crop-water production functions and economic implications for Washington. [Harry Ayer; United States.
Department of Agriculture. Natural Resource Economics Division.;]. fects are sufficiently detailed. The production functions mentioned above – PFCD, PFCES and PFVES are de-scribed below. Cobb-Douglas production function (PFCD) The following equation shows the well-known PFCD with two production factors: Y it =a i e gtA it αB it βu it, (1) where Y it is a crop yield in the region i and in the time t, a.
Downloadable (with restrictions). Crop water production functions (CWPFs) are often expressed as crop yield vs. consumptive water use or irrigation water applied. CWPFs are helpful for optimizing management of limited water resources, but are site-specific and vary from year to year, especially when yield is expressed as a function of irrigation water applied.
Crop-water production functions are important tools for quantifying effects of water scarcity and climate change on agricultural production, and are also widely used within hydro-economic models to support design of inter-sectoral water management policies.
crop production functions, particularly FAO 33 method that is the most common one, for estimat ing relative yield. Since in many locations it is not possible to calibrat e and to. "Soybean crop-water production functions in a humid region across years and soils determined with APEX model," Agricultural Water Management, Elsevier, vol.
(C), pages Foster, T. & Brozović, N., Gibbons examines the water supply problem through five case studies. The problems faced by these regions and the methods suggested to overcome them provide excellent models for the entire United States.
The case studiestypically, expanding suppliesbut economic efficiency principles lead to emphasizing managing the demand. In many cases, this means reducing demand by raising prices.
A dynamic crop‐water production function model is estimated for cotton. Evapotranspiration (ET) depends on soil moisture and soil salinity which in turn depend on irrigation volumes and qualities.
Crop yield is a function of ET. Optimal irrigation scheduling and crop production functions development using AquaCrop and TOMLAB Abstract: Water stress is one of the most influential factors contributing to crop yield loss. The importance of the irrigation constantly increases because of water scarcity and growing demand for agricultural production worldwide.
A review of simplified crop-water production functions, with a proposal for modifiation: Author(s) Sorbello Herrendorf, V.R. Source: Wageningen: International Institute for Land Reclamation & Improvement - Department(s) International Institute for Land Reclamation and Improvement: Publication type: Scientific book (author) Publication year.
Crop-water production functions Crop-water production functions relate seasonal water use to crop yield. Previous efforts to represent the crop-water production function have suggested adopting the general shape of, or ﬁtting ﬁeld data to linear (Barrett and Skogerboe, ; English.
The water running off the field cannot contribute to crop production, so the crop-water production function can only be based on the amount of infiltrated water. The runoff water has economic implications that must be accounted for separately. Crop water production function and its temporal and spatial variation regulation Since crop water production function reveals how crop yield varies with the water variation, it has served as the basis for scientific water saving irrigation.
As a matter of fact, crop water production function has always been the research focus. CROP WATER PRODUCTIVITY: CAN IT BE MONITORED. World Water Week Stockholm, 23 AugustThe development of technology tools for achieving food security, especially in crop water usage goes faster and faster.
One of these new tools is the use of near real-time available data on crop water productivity, obtained from satellite images. The link between the agricultural production and hydrological systems in integrated hydro‐economic models is the crop‐water production function.
Crop‐water production functions used in hydro‐economic models commonly describe crop yield returns to total seasonal irrigation inputs. WATER PRODUCTION FUNCTIONS FOR CENTRAL PLAINS CROPS THOMAS J.
TROUT and WALTER C. BAUSCH USDA-ARS-Water Management Research Centre Ave., Bldg D, Fort Collins, CO @ Abstract. Sustaining irrigated agriculture with limited water supplies requires maximizing productivity per unit of water.
Water Production Functions For High Plains Crops. In: Great Rivers, S. Starrett, ed. Proceedings of the World Environmental & Water Resources Congress Kansas City, Missiouri. This function is the relationship between yield and water applied.
The same relation can be expressed in terms of evapotranspiration (in which case the production function is known as the Etpf - evapotranspiration production function). A gradient sprinkler line source onion experiment was conducted to determine linear Etpf.
Irrigation-yield production functions (IYPFs), irrigation water use efficiency (IWUE), and grain production per unit of applied irrigation of non-drought-tolerant (NDT) and drought-tolerant (DT) maize (Zea mays L.) hybrids were quantified in four locations with different climates in Nebraska [Concord (sub-humid), Clay Center (transition zone.
The world is facing twin challenges of water stress and food insecurity—challenges that are already pressing and are projected to grow [1–3].Because crop production is the largest global consumer of freshwater, and because water is a key resource in food production, neither of these challenges can be addressed in isolation [4, 5].Producing more food for each drop of water will be a crucial.
Abstract. The effect of irrigation water quality (salinity) and quantity on the yields of sweet corn (Zea mays cv. Jubilee) and cotton Gossypium hirsutum L. Acala SJ-2) was studied in a sandy loam (Typic Torrifluvent) each of the irrigation water salinities of C o =and dS/m (for corn) and C o =, and dS/m (for cotton), 10 amounts of irrigation water (Q.
Crop Production And - Free download Ebook, Handbook, Textbook, User Guide PDF files on the internet quickly and easily. level consideration of integrated crop water manage-ment.
In fact, such water productivity improvements (i.e. increasing the yield output per unit of water con-sumed) in both rainfed and irrigated systems paired with an increase in consumptive water use are a sine qua non for raising food production to the tre-mendous amount required (Molden Crop production research was directed towards determining the treatment that provided maximum yield rather than establishing crop-water production functions.
The leaching requirement concept was established for irrigating with saline waters. Abstract. Crop water production functions require precise knowledge of crop productivity across a wide range of soil water availability (WA).
Field studies have demonstrated the yield response of maize (Zea mays L.) to WA, but the relationship has not been quantified across various precipitation years in the North China Plain (NCP).This study was conducted to investigate the effects of the.The present study was carried out to evaluate two crop water production models for estimating the effects of irrigation uniformity on alfalfa hay yields.
The models included the ratio of actual to maximum hay yield, two parameters of the sprinkler water uniformity, and the ratio of gross to required irrigation.Students will explore organic farming, conventional farming, and biotechnology farming methods through a close read approach.
Then they will dive deeper into the different production methods by creating a video that discusses the merits and faults of each production method.