Your search found 7 records
1 Nightingale, H. I.; Hoffman, G. J.; Rolston, D. E.; Biggar, J. W. 1991. Trickle irrigation rates and soil salinity distribution in an almond (Prunus Amygdalus) orchard. Agricultural Water Management, 19(3):271-283.
(Location: IWMI-HQ Call no: PER Record No: H07866)
2 Rolston, D. E.; Bigger, J. W.; Nightingale, H. I. 1991. Temporal persistence of spatial soil-water patterns under trickle irrigation. Irrigation Science, 12(4):181-186.
(Location: IWMI-HQ Call no: PER Record No: H09305)
3 Angelakis, A. N.; Rolston, D. E.; Kadir, T. N.; Scott, V. H. 1993. Soil-water distribution under trickle source. Journal of Irrigation and Drainage Engineering, 119(3):484-500.
(Location: IWMI-HQ Call no: PER Record No: H012849)
Soil-water distributions in homogeneous soil profiles of Yolo clay loam and Yolo sand irrigated from a circular source of water were measured at several times after initiation of irrigation. The effect of trickle discharge rates and soil type on the locations of the wetting front and soil-water content distributions were determined. Soil-water potential and hydraulic conductivity as a function of soil-water content, were also measured. A finite element solution of the two-dimensional transient soil-water equation, the theory of time-dependent, linearized infiltration from a circular source, the effective hemisphere model, and generalized solution for axially symmetric flow were compared with the experimental results. In general, the computed vertical advances of the wetting front were closely related to those observed for both soils. All of the solutions provided a better prediction of the wetting front positions for the clay-loam soil than for the sandy soil. The calculated and measured horizontal wetting fronts did not agree for large time, especially for the generalized solution. A more pronounced underprediction of the wetting front positions by the effective hemisphere theory occurred compared to those predicted by the linearized and finite element theories. Soil-water content distributions computed by linearized and numerical solutions, agreed reasonably with measured values in both soils.
4 Hutmacher, R. B.; Nightingale, H. I.; Rolston, D. E.; Biggar, J. W.; Dale, F.; Vail, S. S.; Peters, D. 1994. Growth and yield responses of almond (prunus amygdalus) to trickle irrigation. Irrigation Science, 14(3):117-126.
(Location: IWMI-HQ Call no: PER Record No: H013986)
5 Angelakis, A. N.; Kadir, T. N.; Rolston, D. E.. 1993. Time-dependent soil-water distribution under a circular trickle source. Water Resources Management, 7(3):225-235.
(Location: IWMI-HQ Call no: PER Record No: H013082)
Soil-water distribution in homogeneous soil profiles of Yolo clay loam and Yolo sand (Typic xerorthents) irrigated from a circular source of water, was measured several times after the initiation of irrigation. The effect of trickle discharge rates and soil type on the locations of the wetting front and soil-water distribution was considered. Soil-water tension and hydraulic conductivity, as functions of soil-water content, were also measured. The theories of time-dependent, linearized infiltration from a circular source and a finite-element solution of the two-dimensional transient soil-water equation were compared with the experimental results. In general, for both soils the computer horizontal and vertical advances of the wetting fronts were closely related to those observed. With both theories, a better prediction of the wetting front position for the clay loam soil than for the sandy soil is shown. The calculated and measured horizontal vertical advances did not agree over long periods of time. With the linearized solution, overestimated and underestimated vertical advances for the clay and sandy soils, respectively, were shown. The finite-element model approximate in a better way the vertical advances than the linearized solution, while an opposite tendency for the horizontal advances indicated, especially in sandy soil.
6 Hutmacher, R. B.; Nightingale, H. I.; Vail, S. S.; Dale, F.; Rolston, D. E.; Peters, D. W.; Brown, P. H.; Pflaum, T.; Bravo, A. D.; Biggar, J. W. 1995. Salinity and boron distribution in microirrigated almonds: Soil and plant accumulations. In Lamm, F. R. (Ed.), Microirrigation for a changing world: Conserving resources/preserving the environment: Proceedings of the Fifth International Microirrigation Congress, Hyatt Regency Orlando, Orlando, Florida, April 2-6, 1995. St. Joseph, MI, USA: ASAE. pp.110-115.
Salinity ; Water quality ; Drip irrigation ; Plant growth ; Horticulture ; Leaching / USA / California / San Joaquin Valley
(Location: IWMI-HQ Call no: 631.7 G000 LAM Record No: H018834)
7 Amali, S.; Rolston. D. E.; Fulton, A. E.; Hanson, B. R.; Phene, C. J.; Oster, J. D. 1997. Soil water variability under subsurface drip and furrow irrigation. Irrigation Science, 17(4):151-155.
Soil water ; Drip irrigation ; Furrow irrigation ; Irrigation systems ; Subsurface irrigation ; Surface irrigation ; Measurement ; Evaluation ; Cotton ; Mathematical models / USA / California / Stratford
(Location: IWMI-HQ Call no: PER Record No: H021255)
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