International Journal of Agricultural Sciences

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Weed Dynamics and Yield as Influenced by Various Weed Control Methods and Fertility Levels in Soybean


Affiliations
1 Department of Agronomy, Junagadh Agriculture University, Junagadh (Gujarat), India
     

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The experiment was conducted during Kharif season of 2006 at Junagadh (Gujarat) to study the weed dynamics and yield as influenced by various weed control practices with different fertility levels in soybean [Glycine max (L.) Merril]. Results indicates that at 20 DAS the treatment W1 (Pre-emergence pendimethalin @ 0.5 kg ha-1 + HW and IC at 30 DAS) recorded lowest number of monocots, dicots and sedges weeds next to W5 (Weed free upto 60 DAS through hand weeding). Similarly at 40 and 60 DAS the treatment W3 (Post-emergence imazethapyr @ 75 g ha-1 at 25 DAS + HW and IC at 45 DAS) also reported minimum number of weeds next to W5. The lowest dry weight of weeds was recorded under treatment W5 followed by W4 and W3. Application of 40:80:40 kg NPK ha-1 recorded significantly higher values of weed count and total dry weight of weeds and grain yield compared to other levels. The treatment W4 (2 HW + 2 IC at 20 and 40 DAS) was found at par with treatment W5 in respect of grain yield.

Keywords

Soybean, Weed Count, Pendimathalin, Quizalofop-Ethyl, Imazethapyr, Fertility Levels.
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  • Weed Dynamics and Yield as Influenced by Various Weed Control Methods and Fertility Levels in Soybean

Abstract Views: 278  |  PDF Views: 0

Authors

P. S. Deore
Department of Agronomy, Junagadh Agriculture University, Junagadh (Gujarat), India
A. B. Patil
Department of Agronomy, Junagadh Agriculture University, Junagadh (Gujarat), India

Abstract


The experiment was conducted during Kharif season of 2006 at Junagadh (Gujarat) to study the weed dynamics and yield as influenced by various weed control practices with different fertility levels in soybean [Glycine max (L.) Merril]. Results indicates that at 20 DAS the treatment W1 (Pre-emergence pendimethalin @ 0.5 kg ha-1 + HW and IC at 30 DAS) recorded lowest number of monocots, dicots and sedges weeds next to W5 (Weed free upto 60 DAS through hand weeding). Similarly at 40 and 60 DAS the treatment W3 (Post-emergence imazethapyr @ 75 g ha-1 at 25 DAS + HW and IC at 45 DAS) also reported minimum number of weeds next to W5. The lowest dry weight of weeds was recorded under treatment W5 followed by W4 and W3. Application of 40:80:40 kg NPK ha-1 recorded significantly higher values of weed count and total dry weight of weeds and grain yield compared to other levels. The treatment W4 (2 HW + 2 IC at 20 and 40 DAS) was found at par with treatment W5 in respect of grain yield.

Keywords


Soybean, Weed Count, Pendimathalin, Quizalofop-Ethyl, Imazethapyr, Fertility Levels.

References