Effect of crop establishment method and weed-management practice on rice (Oryza sativa) and associated weeds
DOI:
https://doi.org/10.59797/ija.v51i4.5034Keywords:
Rice, Establishment method, Zero tillage, Drum seeding, Weed managementAbstract
An experiment was conduced during rainy (kharif) season of 2003 and 2004 to find out the best weed-control practice and crop-establishment method of rice (Oryza saiva L.). Mean plant height was highest (83 cm) in zero tillage. Highest value of leaf-area index (3.28) was recorded in transplanting, as well as the highest mean grain yield (55 qlha), the latter being 45.5, 4.5, 26.7 per cent more than that in dry seeding, drum seeding and zero till- age respectively. Among weed-management practices, herbicide + two hand-weedings gave the highest grain yield (60.96 qlha), and transplanting and herbicide + two hand-weedings gave the highest straw yield. The popu- lation as well as dry weight of weeds were higher in dry seeding and zero tillage. The highest weed-control effi- ciency (70.80%) was recorded in herbicide + two hand-weedings, followed by two hand-weedings, the highest net profit (Rs 22,3441ha) was obtained from the combination of drum seeding with herbicide + two hand- weedings. However, the highest value of benefit: cost ratio (1.66) was recorded in the treatment with drum seed- ing with two hand-weedings.References
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