Pigeon pea, a widely spaced row crop having initial slow growth is sensitive to weed competition during early stages of its growth period. A large proportion of uncovered land during early stages is taken over by rank weed growth, which may cause drastic reduction in growth and yield of pigeon pea. Pigeon pea with additional canopy may suppress weeds, due to shade. To accomplish the same, foliar application of micro nutrient mixture and growth promoters as well as mulching with black gram crop resides were made to increase the growth and spread of pigeon pea and to find its effect on growth, yield and weed suppressing ability.
Field experiments were conducted at Regional Research Station, Aruppukottai during the rabi seasons of 1998-99, 1999-2000 and 2000-2001 to study the effect of graded levels of phosphorus and foliar nutrition on short duration redgram in rainfed Vertisol. The pooled data revealed that application of 37.5 kg P2O2 ha-1 had recorded higher grain yield of 958 kg ha' with a net income of Rs.9338 ha-1 and B-C ratio of 2.32 than 12.5 kg P2O5 ha but on par with application of 25 kg P2O2 ha'. Foliar application of di-ammonium phosphate two per cent had improved the grain yield and income with high B-C ratio.
Field experiments were conducted during rabi season of 1995 to 1998 at Regional Research Station, Aurppukottai, to find out the optimum time of sowing and plant population for short duration redgram in rainfed vertisols. September first fortnight sowing recorded highest mean grain yield (812 kg ha-1), gross income (Rs. 12985 ha-1) and benefit cost ratio (3.48). Plant population level @ 4.0 lakhs ha (25 x 10 cm) had registered higher grain yield (390 kg ha') and gross income (Rs. 6224/-).
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