Line Source of Water Application - An Appropriate Drip Irrigation System for Field Crops
DOI:
https://doi.org/10.52151/jae2003402.1038Abstract
Drip irrigation system is generally adopted in widely spaced row crops by providing point source(s) of water application to individual plants. Its adoption for closely spaced field crops requires drip laterals to serve as line sources of water application. Widths. Of wetted strips under laterals having emission rates of 8, I 0,12 and 16 Lph/m were observed under durations of operation of I, 2 and 3 hr, in a sandy loam soil. The wetted widths, in all the line sources were found increasing almost linearly with time as well as with increasing emission rates. A prediction equation (S = 6.914 + 6.70T + 2.786 q) was developed for determining the spacing between two adjacent laterals, S (em) for a known operation duration, T (up to 3 hr) and emission rate of the laterals, q (ranging between 8 to 16 Lph/m).
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References
Black JD. F. 1976. Trickle irrigation – a Review. Hoprt. Abs. 46, 69-74.
Brandt A; Bresler E; Ben-Asher J; Heller J; Goldberg D. 1971. Infiltration from trickle source: I. Mathematical models. Proc. Soil Sci. Soc. of Amer., 35: 675-682.
Bresler E; Heller J; Diner N; Ben-Asher J; Brandt A; Goldberg D. 1971. Infiltration from a trickle source: II. Experimental data and theoretical prediction. Soil Sci. Soc. Amer. Proc., 35: 683-689.
Kang Y; F Wang; S Liu. 2002. Effects of Drip irrigation frequency on soil wetting pattern and root distribution of potato in N.C. plain. Paper no. 022182. Proc. of ASAE Annual meeting.
Kaul RK; Michael AM.1987. Moisture front advance under a point source of water application. 1. Agril. Engg.,19 (2): 1-8.
Keller J; Karmeli D. 1974 Trickle irrigation design. Rainbird sprinkler manufacturing corporation, CA, pp 132.
Patel Neelam; Rajput TBS.2001. Moisture front advance studies under twin emitter drip irrigation system. Journal of Indian Water Resources Society, Vol.: 21 (2):79-88.
Saxton KE. 1986. Estimating generalized soil water characteristics from texture. Soil Sci. Soc. Amer. J. 50(4): 1031-1036.
Schwartzman M; Zur B .1986. Emitter spacing and geometry of wetted soil volume. J. Irr. Drain Eng, ASCE,112: 242-253.
Singh SR. 2000. Annual Report for 1999- 2000 of the Directorate of Water Management Research, Patna. 288 p.
Warrick AW. 1985. Point and line infiltration - Calculation of wetted soil surface. Soil Sci. Soc. Amer. J., 49:1582 - 1583.
Zur D. 1996. wetted soil volume as a design objective in trickle irrigation, Irrigation Science, 16:101-105.
