Agricultural Lands Frequently Require Nutritional Supplementation Because

Agricultural lands frequently require nutritional supplementation because

A) nitrogen-fixing bacteria and detrivores do not cycle nutrients as effectively as they do on wild lands.
B) the nutrients that enter the plants are not returned to the soil on lands where they are harvested.
C) the prairies that comprise good agricultural land tend to be nutrient-poor.
D) grains raised for feed must be fortified, and thus require additional nutrients.
E) cultivation of agricultural lands inhibits the decomposition of organic matter.