Lysimetric Monitoring for Operation of Irrigation Systems in the USSR
The author suggests a new method for operational control of irrigation regimes which is based on monitoring of a number of critical parameters related to the yield potentials of crops....
Adopted Drip Irrigation Technology for Developing Countries
Two low cost drip irrigation systems are presented. Even though the uniformity of these systems is not as high as the conventional drip systems, the initial and operating costs of the...
Surface-Drained Level Basins for Rice Production
Surface-drained level-basin systems, consisting of a series of terraced level basins in which a portion of the applied water is drained from the inlet end of the basin, can be used to...
A Decision Support System for Prediction of Crop Yield, Evapotranspiration, and Irrigation Management
Computer simulation models have been developed which predict growth, development, and yield for grain legumes. These models can be applied for yield prediction as well as water management...
Crop Simulation Modeling for On-Farm Irrigation Management
Crop models that estimate crop productivity in response to soil water offer potential for on-farm irrigation management. Useful models must produce accurate estimates of the soil water...
Crop Growth Models in Irrigation Management: Applications and Limitations
Crop growth models can provide helpful input to the complex process of on-farm irrigation decision making. The use of crop models in irrigation management will likely expand due to improved...
Evapotranspiration and Growth Predictions of CERES Maize, Sorghum and Wheat in the Southern High Plains
Daily ET, leaf area index, and dry matter accumulation were predicted using CERES models for maize, sorghum, and winter wheat grown at Bushland, Texas to determine the models'...
Estimation of Ground Cover via Spectral Data
Potato ground cover and spectral data were measured in the Columbia Basin during 1990 growing season. Three spectral models were correlated with ground cover; normalized difference, red...
Crop Canopy Models for Estimating Evapotranspiration from Row Planted Field
To evaluate the consumptive use efficiency of irrigated water, it is useful to estimate the soil surface evaporation component separately from the transpiration component. Interception...
Efficient Water Use in Irrigated Wheat
Border irrigated wheat is the main crop in arid, semiarid and winter-dry areas in Mexico. In general water use efficiency is low, since border irrigation systems are not well designed...
Long-Term Effects of Tillage and Crop Rotation on the Leaching of Nitrate and Pesticides to Shallow Groundwater
Contamination of groundwater by nitrate-nitrogen (NO3-N) and pesticides is a serious problem and concern in Iowa. The extent of contamination can...
Development of Crop Coefficients Using Lysimeters
A long term record of evapotranspiration by grass as measured with the large weighing lysimeter at the University of California at Davis provided an excellent background for the initiation...
Survey: Dredge Material Can Lead to Bumper Crop
Influence of Tillage on Hydrology in Western Iowa
USDA Agricultural Research Service has operated four field-sized watersheds in the deep loess soils of western Iowa since 1964. Throughout this time, two watersheds were cropped to corn...
Supplemental Irrigation by Runoff Farming: An Economic Assessment
A simulation model was used to evaluate the economic potential for using runoff farming techniques for growing grain sorghum at two locations in Texas. The results show that the yearly...
Evaluation of THM-Formation Potential from Pilot Processes
Using Neutron Probes to Aid Irrigation Scheduling
Neutron soil moisture measurements are used to supplement irrigation forecasts on the 60,000 acre sprinkler-irrigated Navajo Indian Irrigation Project (NIIP). Weekly irrigation forecasts...
An Interactive Computer System for Estimating Monthly Evapotranspiration
An Assessment of Input Variables to the Penman-Monteith Equation Using Canopy Reflectance Measurements
Observing the form of the Penman-J.L. Monteith equation, it can be seen that several terms could be potentially estimated from remotely sensed data. These include: net radiation, canopy...
Blending Saline and Non-Saline Waters Reduces Water Usable for Crop Production
The purpose of this paper is to provide theoretical and conceptual evidence to show that water quality protection programs which dispose of agricultural drainage waters through blending...
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