Results 231 to 240 of about 15,471 (289)

Relative Water Uptake Rate as a Criterion for Trickle Irrigation System Design: II. Surface Trickle Irrigation

Soil Science Society of America Journal, 2010
We previously developed a new, coupled‐source–sink modeling approach for evaluating an upper bound to the relative water uptake rate (water use efficiency) for two‐ and three‐dimensional geometries. Because the formulated water‐flow problem is linear, the relative water uptake rate for any given collection of point (or line) sources and point (or line)
Gregory Communar, Shmulik P. Friedman
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Optimum irrigation rates for young trickle irrigated peach trees

Australian Journal of Experimental Agriculture and Animal Husbandry, 1977
At the Scoresby Horticultural Research Station in the 1973-74 season an empirical formula was developed to relate the water needs of young peach trees to tree size as measured by butt area and evaporation demand as measured with a Class A pan evaporimeter. The formula was expressed as litres per cm2 of butt area per cm of evaporation.
JDF Black, PD Mitchell, PN Newgreen
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Cotton Water Stress Under Trickle Irrigation

Transactions of the ASAE, 1989
ABSTRACT Cotton was trickle irrigated two to three times weekly in 1984 and 1985 using buried perforated tubing under each row. Water application rates were about 0.6, 1.0, and 1.3 times estimated consumptive use (CU). The cotton was monitored for water stress using the crop water stress index (CWSI), soil water content, and yield.
null D. D. Fangmeier, null D. J. Garrot, null Jr., null S. H. Husman, null J. Perez   +4 more
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Three-Dimensional Infiltration and Trickle Irrigation

Transactions of the ASAE, 1985
ABSTRACT SHORT and long time theories of water movement during three-dimensional infiltration are tested both in the laboratory and the field. The utility of Wooding's (1968) theory of infiltration from a shallow, surface pond is demonstrated. Inefficiencies in trickle irrigation can in some cases result from surface free water accessing vented ...
null Brent Clothier, null Dave Scotter, null Ewan Harper   +2 more
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Design Nomographs for Trickle Irrigation Systems

Journal of Irrigation and Drainage Engineering, 1984
Nomographs relating discharge rate, plant uptake and soil water potential at a reference point are developed for trickle irrigation systems. The hydraulic conductivity K is assumed to be related to pressure head h by K\do EXP (αh) in which K\do and α are empirical constants representative of the specific soil.
A. Amoozegar‐Fard, A. W. Warrick, D. O. Lomen   +2 more
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Designing Trickle Irrigation Laterals for Uniformity

Journal of the Irrigation and Drainage Division, 1974
Design equations are derived that can be utilized to calculate the maximum lateral length for a given value of the uniformity coefficient. The solution depends upon the emitter flow function, elevation change, pipe size, reduction coefficient for dividing flow, pipe roughness coefficient, the average emitter flow rate, and either the average emitter ...
Terry A. Howell, Edward A. Hiler
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Water Treatments in Trickle Irrigation Systems

Journal of the Irrigation and Drainage Division, 1978
Water treatment requirements of Colorado River water for eight types of trickle emitters were being determined using six kinds of treatments, including screen and sand filtration, and combinations of hypochlorite and acid additions. With the water used, removal of suspended particulate materials by sand filtration maintained emitter performance over ...
Francis S. Nakayama, D.A. Bucks, R.G. Gilbert   +2 more
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Trickle irrigation for home gardens

2015
Reprint ...
Drinkwater, William O., Carpenter, H. E. (Harold E.)   +1 more
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Nitrogen fertigation of trickle-irrigated potato

Fertilizer Research, 1988
This three-year field study, on Pellic Vertisol, was designed to investigate the response of trickle-irrigated potato (Solanum tuberosum L.) to four nitrogen levels continually applied with the irrigation stream. Waters containing 70, 130, 190, and 250 mg Nl−1 and uniformly supplied with 50 and 120 mgl−1 of P and K, respectively, were applied when the ...
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Global Uniformity of Trickle Irrigation Systems

Transactions of the ASAE, 1985
ABSTRACT Asimulation model for the study of trickle irrigation uniformity was developed which treats the various equipment, system and other factors known to influence emitter flow rate variation. The model provides a tool for the assessment of global trickle uniformity in the sense that the assessment need not be spatially or otherwise restricted.
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