Linked to this understanding are broader concepts such as the regular removal of crops, the removal of nutrients, soils becoming acidic over time, and leaving appropriate gaps between manuring and fertilizers to avoid nitrogen being converted to ammonia. You should also be able to explain that plants grown on the wrong soil will be stressed, not do well, and may be more susceptible to disease. Finally, you should be able to discuss compost and how it is made, its uses, other soil ameliorants, their characteristics and benefits, and limitations.
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