Crop Rotation for Weed Control

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Crop rotation is one of the oldest and most effective cultural control strategies as a planned order of specific crops planted on the same field.  The new crop you put in the field will be from a different family. The idea behind this is to change what nutrients the crop uses, and the insects it attracts.

In terms of soil, each crop needs different nutrients. Changing the crop every year prevents reduction in any one nutrient in your field.  It also means that the succeeding crop belongs to a different family than the previous one.

Some insect pests and disease-causing organisms are hosts’ specific. If you don’t rotate crops belonging to a different family, the problem continues as food is always available to the pest.

Planned crop rotation may vary from 2 or 3 year or longer period and provides the following benefits:

Prevents soil depletion
Maintains soil fertility
Reduces soil erosion
Controls insect/mite pests
Reduces reliance on synthetic chemicals
Reduces the pests’ build-up
Prevents diseases
Helps control weeds

http://www.environment.gov.au/index.html

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