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This article in AJ

  1. Vol. 71 No. 3, p. 401-404
     
    Received: May 20, 1978


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doi:10.2134/agronj1979.00021962007100030006x

Influence of Different Levels of Irrigation and Nitrogen on Yield and Nutrient Uptake by Wheat1

  1. N. T. Singh,
  2. A. C. Vig,
  3. Rachhpal Singh and
  4. M. R. Chaughary2

Abstract

Abstract

Irrigation and fertilizers are two vital but costly inputs in irrigated agriculture. Their economic use demands that maximum yield should be obtained per unit application of these inputs. A constraint on irrigation water supply must accompany a corresponding cut on fertilizer application and vice versa. A study was, therefore, conducted to find out the response of wheat (Triticum aestivum L.) to different levels of irrigation and N for 3 years in a deep sandy loam soil underlain by a clay loam, belonging to the family fine loamy, hyperthermic, mixed, calcareous, Typic Ustocherpt. The irrigation treatments were check, 1, 2, and 3 irrigations applied according to irrigation water applied per pan evaporation ratio of 0.90 and N levels were 60, 80, 100, and 120 kg N/ha. In the normal rainfall years of 1974–75 and 1976–77, wheat yield increased with number of irrigations. In the unusually wet year of 1975–76, however, response to irrigation was non-significant. No response was observed beyond a N application of 80 kg/ha without irrigation, whereas, the response was linear up to 120 kg N/ha in the three irrigation treatment. The uptake of N was a linear relationship with crop yield. Apparent water use by the crop increased in the high rainfall year and with increasing number of irrigations.

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