Temporal water stress effects on nodulation,nitrogen accumulation and growth of soybean |
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Authors: | C Kirda S K A Danso F Zapata |
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Institution: | (1) Department of Soil Science, Indira Gandhi Agricultural University, Krishak Nagar, 492 012 Raipur, M. P., India;(2) Department of Soil Science, J. N. Agricultural University, 482 004 Jabalpur, M. P., India |
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Abstract: | The objective of this study, carried out over 2 years, was to evaluate the effect of soil properties on the response of maize
(Zea mays L.) to zinc applications and relate these properties to soil test Zn for predicting the Zn status of soils considering the
effect of environmental conditions. The relative yield, expressed as an index of crop response, was related through multiple
regression to CEC (or clay), electrical conductivity (or exchangeable Na), and bulk density consistently throughout the two
year period that included one relatively wet, cool and cloudy growing season when variations in relative yield were explained
also by 0.5M NaHCO3-extractable-P and organic C. A procedure is presented to establish limits for the soil propeties and soil-test-extractable-Zn
and to meaningfully combine them into a model to predict soil Zn status. A model that combined soil test Zn, texture and electrical
conductivity was satisfactory for the purpose of prediction and for adoption for soil testing on a routine basis. The suggested
approach may be suitable for designing models with soil properties associated with crop responses to micronutrients in other
situations.
Deceased 22 September 1988 |
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Keywords: | alluvial soils environmental conditions maize soil properties soil Zn status soil Zn tests |
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