Editing Crop rotation (section)

== Challenges ==

While crop rotation requires a great deal of planning, crop choice must respond to a number of fixed conditions (soil type, topography, climate, and irrigation) in addition to conditions that may change dramatically from year to the next (weather, market, labor supply).<ref name="johnson2009"/> In this way, it is unwise to plan crops years in advance. Improper implementation of a crop rotation plan may lead to imbalances in the soil nutrient composition or a buildup of pathogens affecting a critical crop.<ref name="johnson2009"/> The consequences of faulty rotation may take years to become apparent even to experienced soil scientists and can take just as long to correct.<ref name="johnson2009"/>

Many challenges exist within the practices associated with crop rotation. For example, [[green manure]] from legumes can lead to an invasion of snails or slugs and the decay from green manure can occasionally suppress the growth of other crops.<ref name="RHS"/>