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CROP ROTATION

Increase in soil nitrogen

Improvement in the physical condition of the soil

Increased bacterial activity

Increased release of carbon dioxide

Excretion of beneficial substances

Control of weeds, insects, and disease

The injurious effects of preceding crops, which I aim to avoid by careful rotation planning, are produced by

Depletion of soil nutrients

Excretion of toxic substances

Increase in soil acidly

Production of injurious substances resulting from the decomposition of plant residue

Unfavorable physical condition of the soil due to a shallow-rooting crop

Lack of proper soil aeration

Removal of moisture

Diseases passed to subsequent crops

Influences of crops upon the soil flora and fauna

Copyright 1990.