|Author:||Singh, R. D. ; Subhash, Chandra|
|Book Group Author:||NA|
A field experiment was conducted for three consecutive rabi seasons of 1991-92 through 1993-94 in Almora, Uttaranchal, India, to determine the effects of soil water availability and nitrogen use efficiency on wheat crop production. The soil of the study site was sandy loam. The treatments were comprised of: three moisture regimes in main plot (rainfed, presowing irrigation and irrigation at crown root initiation (CRI) stage); and four nitrogen levels (0, 10, 20 and 40 kg N/ha) as top dressing in subplots. A basal dose of 40:20:0 (N:P2O5:K2O) was applied to all treatments. Results showed that wheat yield significantly increased due to irrigation either as presowing (mean 35.30 q/ha) or at CRI stage (mean 36.03 q/ha). The grain yield progressively increased with top dressing up to 40 kg N/ha (mean 38.60 q/ha) every year but the response to per kg N decreased with the increase in N dose. The rainfall received during winter months ensured adequate soil water for efficient utilization of nitrogen. The irrigation treatments recorded more seasonal water use and expense than that of rainfed control. The water use efficiency was highest with rainfed and lowest with presowing irrigation treatment. No significant difference was observed in water expense efficiency between irrigation treatments, but both were superior to rainfed treatment. Similarly, the apparent water use efficiency did not show significant difference among the moisture regimes.
|Pages:||78 - 79|
|Journal:||Indian Journal of Soil Conservation|
arid lands, crop production, crop yield, dry farming,irrigation, irrigation water, nitrogen fertilizers, plant waterrelations, roots, sandy loam soils, seasonal variation, soil types, soilwater content, soil water regimes, top dressings, use efficiency, wateravailability, water use, water use efficiency, wheat, India,Uttaranchal, Triticum, Triticum aestivum, Poaceae, Cyperales,monocotyledons, angiosperms, Spermatophyta, plants, eukaryotes,Triticum, South Asia, Asia, Developing Countries, Commonwealth ofNations, India, dryland farming, seasonal changes, seasonalfluctuations, watering, Field Crops (FF005) (New March 2000), PlantPhysiology and Biochemistry (FF060), Plant Water Relations (FF062),Plant Production (FF100), Plant Cropping Systems (FF150), Soil Physics(JJ300), Fertilizers and other Amendments (JJ700), Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management]