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Effect of boron application time on yield of wheat, rice and cotton crop in Pakistan

Author(s): Riaz Ahmad* and Muhammad Irshad

Journal: Soil & Environment
ISSN 2074-9546

Volume: 30;
Issue: 1;
Start page: 50;
Date: 2011;
Original page

Keywords: Boron | sowing time | wheat | rice | cotton | yield parameters

Boron (B), one of the essential micronutrients, plays vital role in plant growth. Thirty one field experimentswere conducted to evaluate the response of wheat, rice and cotton to B application throughout Pakistan during2005-08. Boron was applied at 1 kg ha-1 as Borax decahydrate (11.3% B) at different times along withrecommended doses of N, P and K. The results revealed that B application at sowing time to wheat increasedsignificantly the number of tillers plant-1 (15%), number of grains spike-1 (11%), 1000-grain weight (7%) and grainyield (10%) over control. Among the treatments, B application at sowing time showed best results followed by Bapplication at 1st irrigation and at booting stage. In rice (coarse), B application before transplanting substantiallyincreased number of tillers hill-1 (21%), plant height (3%), panicle length (10%), and number of paddy grainspanicle-1 (17%), 1000-grain weight (11%) and paddy yield (31%) over control. Response of fine rice to Bapplication was similar for all yield parameters as in coarse rice. In cotton, B application considerably increasedplant height (3%), number of mature bolls plant-1 (12%), seed weight boll-1 (8%) and seed cotton yield (9%) overcontrol. Although, B application at all stages significantly increased yield parameters tested but B application atsowing time was best among all treatments.
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