Sowing Triticum durum wheat cv, Raj 911' and 'HD 4519 on soven dates (at fortnightly interval in October to January) gava enormously variable grain yields, from 25.2 to 520 g/he in 1973-74 and 18.8 to 48.8 q/hs in 1974-75. Grain yield decreased by delaying sowing fram November. 'HD 4519' out yielded 'Rej 911, because of higher number of spikes per unit area. Grop made little growth before maximum tillering in early sewings. In late sowings, about 90% growth was completed before ear-emergenco. Nutrient (NPK) concentration in plants was lower in early sowings and higher in lato swoings, Nutrient uptake, which is a function of total dry- matter produced and nutri- ent concentration in plants was, however, higher in early sowings and lower in late sowings.
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