Interdependence of nitrogen and irrigation effects on growth and input-use efficiencies in wheat

Gajri, P.R. and Prihar, S.S. and Arora, V.K. (1993) Interdependence of nitrogen and irrigation effects on growth and input-use efficiencies in wheat. Field Crops Research, 31 (1). pp. 71-86.

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Abstract

The effects of combinations of nitrogen rates and irrigation regimes on yield and seasonal waterand nitrogen-use efficiencies of wheat on deep alluvial loamy sand and sandy loam soils with low organic carbon content were studied. Nitrogen application not only increased evapotranspiration and its transpiration component but also increased water-use efficiency of biomass production (based on transpiration). There was a significant positive interaction between applied nitrogen and water supply for their effects on wheat yields. For the pooled data of two soils, a polynomial expressing grain yield as a quadratic function of nitrogen and water supply and their interaction explained 92% of the variation in yield. Isoquants based on this equation showed that within certain limits, nitrogen and water supply substituted for each other in increasing wheat yields.

Item Type:	Article
Author Affiliation:	Department of Soils, Punjab Agricultural University, Ludhiana, India
Subjects:	Plant Protection > Pesticides Plant Protection > Pests
Divisions:	Other Crops
Depositing User:	Mr B Krishnamurthy
Date Deposited:	02 Mar 2012 05:43
Last Modified:	02 Mar 2012 05:43
URI:	http://eprints.icrisat.ac.in/id/eprint/3391

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