Wheat response to open pan evaporation based irrigation scheduling on two oxic paleustalfs

Gill, K.S.; Lenvain, J.S.

Communications in Soil Science and Plant Analysis 23(9-10): 1089-1103


ISSN/ISBN: 0010-3624
DOI: 10.1080/00103629209368651
Accession: 008005316

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Response of wheat (Triticum aestivum L.) from two (a normal and a compacted) Oxic Paleustalfs, to irrigation schedules based on open-pan evaporation was studied for three seasons. Three irrigation intervals (I) of 50-, 70-, and 100-mm cumulative open-pan evaporation (COPE) were used to schedule irrigation. These irrigation intervals were combined with irrigation water to COPE ratios (R) of R0.60, R0.75, R0.90, and R1.05, and the crop coefficient to calculate the depth of each irrigation. Irrigation interval between 50 to 75 mm COPE and irrigation depth based on R0.75 to R0.90 were found satisfactory for both of these soils. Lower wheat yields from the normal soil indicated that physical condition of the soils contributed towards wheat response to irrigation. Evaluation of open-pan based irrigation scheduling for other climatic conditions, and consideration of the physical conditions of a soil to predict crop response to irrigation are recommended.