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VARIABILITY OF SOIL WATER PROPERTIES AND CROP YIELD IN A SLOPED WATERSHED 1
Author(s) -
Naney J. W.,
Williams R. D.,
Ahuja L. R.
Publication year - 1988
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1988.tb02985.x
Subject(s) - environmental science , soil water , pedotransfer function , soil texture , silt , soil science , water content , field capacity , crop yield , agronomy , hydraulic conductivity , leaching model , hydrology (agriculture) , soil fertility , geology , paleontology , geotechnical engineering , biology
Spatial distribution of soil and water properties and the correlations between them and crop yield were determined for a natural rainfall environment. Hydraulic conductivity, soil texture, water retention, and soil‐water flux were variables used to investigate their relationship to crop yield using multiple regression techniques. Variations in crop yields on a watershed with a 3 to 4 percent slope and moderately erosive soils were related to soil‐water characteristics and soil properties along slope and with depth. Climatic conditions to sustain crop growth and yield ranged from inadequate soil water in 1983 to adequate soil water in 1984. Crop yield was predicted with models using both available and measured soil‐water content. Available water content provided a better model for the prediction of water yield and does not require field measurements of actual soil‐water content. Soil water holding capacity was more significant for predicting crop yield in soils with moderate to high silt content than infiltrability of water into the soil.