Effect of irrigation intensities and NP fertilizer levels on the growth and yield of wheat

An experiment was conducted to evaluate the effect of number of irrigations and NP fertilizer combinations on the growth and yield of wheat during the year 1998-99 at Agronomy, Section, Agriculture Research Institute, Tandojam. The experiment was laid out in Complete Randomized Design with factorial arrangements of the treatments having four replications with net plot size of 3 * 5 meters. The study was comprised of three irrigation levels i.e. 2, 3 and 4 irrigations and three fertilizer levels i.e. 100-50, 125-62.5 and 150-75 kg NP/ha. Variety Anmol was sown. Maximum plant height (109.5 cm, 110.55 cm and 112.00 cm) was recorded under 4 irrigations, 150-75 kg NP/ha and in the treatment interaction of 4 irrigations * 154-75 kg NP/ha respectively. Results obtained were statistically non-significant for irrigations and their interactions. Whereas, highly significant for fertilizer levels. Highest earhead lengths (10.91 cm, 11.06 cm and 11.20 cm) was recorded from 4 irrigations, 150-75 kg NP/ha and interaction of 4 irrigation * 100-75 kg NP/ha respectively. Significant response was statistically observed for fertilizer levels and non-significant response for irrigations and their interactions. Average maximum number of grains per earhead 54.13, 55.17 and 56.00 was recorded under four irrigations, 150-75 kg NP/ha fertilizer level, and interaction of 4 irrigations * 150-75 NP/ha fertilizer level respectively. Results obtained were statistically non-significant for irrigations and their interactions and highly significant for fertilizers. Highest weight of 10 tillers i.e. 44.33 g 45.33 and 45.67 was recorded from 4 irrigations, 150-75 kg NP/ha and their interactions respectively. Statistically results achieved were significant for irrigation and their interactions and non-significant for fertilizer levels. Maximum weight of grains/10 tillers i.e. 22.94 g. 22.73g and 23.73g was obtained under four irrigations, 150-75 kg NP/ha fertilizer level and their interactions. Results obtained were statistically non-significant. Maximum biological yield/sq. meter (1.92 kg, 1.92 kg and 2.00 kg)/sq. meter was obtained from four irrigations, 150-75 kg NP/ha and their interaction. The results achieved were statistically highly significant for fertilizer levels and non-significant for irrigations and their interaction. Four irrigations 150- 75 kg NP/ha and their interaction produced highest yield of 0.88 kg (2944.44 kg/ha), 0.95 (316(A7 kg/ha) and 0.98 (3266.67 kg/ha) kg/3 sq. meter respectively. Statistically highly significant response was achieved for fertilizer levels and non-significant response for irrigation and their interactions. Results of bhoosa yield/3 sq. meters were statistically highly significant for fertilizer levels and non-significant for irrigation and their interactions. However, highest bhoosa yield/3 sq. meter 0.68 kg, 0.93 and 0.96 kg was obtained from four irrigations, 150- 75 kg NP/ha and 4 irrigations * 150-75 kg NP/ha respectively. It is concluded that four irrigations and 150- 75kg NP/ha fertilizer levels gave best yield response for wheat variety Anmol under agro-ecological conditions of Tandojam.