Influence of row spacing and seed rate on seed yield of lentil (Lens culinaris) under different sowing dates

Inderjit Singh; Virender Sardana; Sekhon, H.S.

Indian Journal of Agronomy 50(4): 308-310

2005


ISSN/ISBN: 0537-197X
Accession: 012798039

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Abstract
A field experiment was conducted on sandy-loam soil of Gurdaspur, Punjab, India, during the 1998-2000 winter season (rabi) to study the effect of different sowing dates, row spacings and seed rates on the productivity of lentil (Lens culinaris cv. LG 308). There was a significant reduction in seed yield with delay in sowing from 10 November to 10 December. Lentil sown on 10 November (14.6 q/ha) outyielded the crop sown on 25 November and 10 December by a margin of 12.8 and 90.1%, respectively. The crop sown on 10 November recorded higher net income (Rs 1826/ha) and benefit:cost ratio (0.23) than 25 November-sown crop which in turn recorded Rs 5797/ha higher net returns and 0.75 higher benefit:cost ratio. Row spacing of 20 cm (12.3 q/ha) resulted in 4.2 and 9.5% more seed yield than closer (17.5 cm) and wider (22.5 cm) row spacings, respectively. Row spacing of 20 cm recorded Rs 680 and Rs 1047/ha higher net returns and benefit:cost ratio to the tune of 0.10 and 0.12 over row spacings of 17.5 cm and 22.5 cm, respectively. Seed rate of 37.5 kg/ha gave 8.2% more seed yield than 45 kg seed/ha which in turn recorded 5.4% more seed yield than 50 kg seed/ha. Similarly, seed rate of 37.5 kg/ha recorded higher net income and benefit:cost ratio than higher seed rates. Significantly higher mean seed yield was obtained in lentil sown on 10 November at 20 cm row spacing (15.7 q/ha) and that sown on 10 November using 37.5 kg seed/ha (15.9 q/ha). Seed yield (13.6 q/ha) of lentil sown at row spacing of 20 cm using 37.5 kg seed/ha was significantly higher than all other combinations of seed rates and row spacings.