Demonstration and evaluation of the effect of different irrigation frequencies on the growth and yield of wheat in standing cotton.

Wheat is the staple food of Pakistan. Wheat planting is delayed due to late picking of cotton. A field experiment was conduct ed during winter seasons 2012-13 and 2013-14. The effect of different irrigation frequencies on the yield of wheat as relay crop sown in standing cotton was evaluated at Adaptive Research Farm Rahim Yar Khan. Three different irrigation frequencies of wheat sown in standing cotton were evaluated in a three replicated RCBD method. In 1 st treatment three irrigations at (crown root, booting and milking stage), in 2 nd one four irrigations at (crown root, after stem elongation, booting and milking stage) and in 3 rd treatment five irrigations at (crown root, stem elongation, booting, early milking and early dough stage) were checked out. Results revealed that all the yield and yield parameters were significantly affected by the different irrigations frequencies of wheat in standing cotton. The average of two years result revealed that significant maximum plant germination i.e 170.52 m -2 , fertile tillers i.e 317.90 m -2 , height 105.66 cm, 1000 grain weight i.e 40 (g) and grain yield of 4490 kg ha -1 was obtained when four irrigations at (crown root, after stem elongation, booting and milking stage) was applied to wheat crop sown in standing cotton as relay crop. Different irrigations frequencies were economical for all wheat varieties when sown in standing cotton.