The term "Input" refers to any sort of substance used by a producer for pest control or for soil fertility management. For example, inputs may include soil amendments like lime, mineral calcium or compost. Some farmers may use animal by-products like fish emulsion, fishmeal, blood meal, bone meal or meat meal
Inputs can be certified organic approved or not. As an organic producer you must use only approved inputs. In general, synthetic substances are prohibited, but there are some exceptions on the National List.