Growth, yield and water-use efficiency of wheat (Triticum aestivum) as influenced by irrigation and nitrogen in sodic soils
Kumar, A.; Sharma, D.K.; Sharma, H.C.
Indian Journal of Agronomy 39(2): 220-224
ISSN/ISBN: 0537-197X Accession: 002629441
In a field trial on highly sodic soil amended with gypsum at Karnal, Haryana in the 1990-92 winter seasons, wheat HD 2285 was not irrigated or irrigated at irrigation water:cumulative pan evaporation (IW:CPE) ratios of 0.6, 0.9 or 1.2, and given 0, 60, 120 or 180 kg N/ha. Crop growth rate, leaf area duration and grain yield increased with increasing irrigation and fertilizer rates. Water use efficiency was highest at 0.6 IW:CPE and increased with increasing N rate. The economic optimum N rate was calculated to be 156 kg/ha, giving an estimated yield of 2.93 t/ha.