Abstract
A study was conducted in three successive seasons during 2008-10 on sandy loam soil at Adaptive
Research Farm, Rahim Yar Khan. The objective was to investigate the response of cotton (cv.MNH-
786) to different levels and times of application of potash. The treatments comprised three potassium
doses (0, 62.5 and 125 kg ha-1) and applied at different times (full on sowing, full at 1st irrigation and
½ at sowing + ½ at 1st irrigation). Potassium doses applied at different times significantly affected
seed cotton yield. On an average the highest seed cotton yield (3030.75 kg ha-1) was obtained when
crop was fertilized at the rate of 125 kg ha-1 K (full sowing) followed by 62.5 kg ha-1 K full at sowing
(2875.25 kg ha-1). So potassium fertilizer application at sowing proved more beneficial than its split
application at sowing and 1st irrigation. The lowest yield was noted in control (2258.52 kg ha-1) where
no potassium fertilizer was applied. Hence application of K at economical doses of 62.5 kg ha-1 is
recommended in ecological zone of Bahawalpur.
Muhammad Aslam, Ashiq Hussain Sanghi, Laila Khalid, Shamaun Javed. (2014) EFFECT OF POTASH LEVELS AND TIME OF APPLICATIONS ON SEED COTTON YIELD IN ECOLOGICAL ZONE OF RAHIM YAR KHAN, Asian Journal of Agriculture and Biology, Volume 2, Issue 3.
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