Weed Control in Rainfed Agriculture (Jun 12, 2017)

Weed cause considerable damage to the crops in general and in dryland. The weeds complete with crop plants in respect of moisture and nutrients. The moisture as such is already in short supply in dryland. In fact, one of the measures of moisture conservation is to control weeds. 

The increased damage varies from 35 to 97% of Pre-tillage operations, usually deep ploughing reduces weed intensity control of annual weeds is not problem in rabi soils but control of perennial weeds like, weeds in kharif lands are the problem. The cost involved in weed control is not likely to be compensated by the production.
 
Weed control methods: 

  • Mechanical weed control: Hand weeding or hoeing carried out at 30 to 35 days of sowing at grand growth period. During this period plant growth is slow and there is set back to crop growth affecting tillers, panicle size and poor stand in general.
  • Chemical weed control: Under certain situations like shortage of labour, inaccessibility of fields due to rains and mechanical weed control is with great difficulty, the chemical weed control has place in dry lands. In this regards reemergence of application of weedicide has a place. 
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