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soil conditioner
A soil conditioner is a product which is added to soil to improve the soil’s physical qualities, especially its ability to provide nutrition for plants. In general usage the term soil conditioner is often thought of as a subset of the category soil amendments, which more often is understood to include a wide range of fertilizers and non-organic materials.〔(【引用サイトリンク】url=https://www.soils.org/publications/soils-glossary# )〕 Soil conditioners can be used to improve poor soils, or to rebuild soils which have been damaged by improper management. They can make poor soils more usable, and can be used to maintain soils in peak condition.〔(【引用サイトリンク】url=http://www.ksre.ksu.edu/library/CRPSL2/ncr295.pdf )〕
==Composition==
A wide variety of materials have been described as soil conditioners due to their ability to improve soil quality. Some examples include biochar, bone meal, peat, coffee grounds, compost, coir, manure, straw, vermiculite, sulfur, lime, blood meal, compost tea, hydroabsorbant polymers, sphagnum moss,〔(【引用サイトリンク】url=http://www.ext.colostate.edu/pubs/garden/07235.html )〕 and biosolids.
Many soil conditioners come in the form of certified organic products, for people concerned with maintaining organic crops or organic gardens. Soil conditioners of almost every description are readily available from online stores or local nurseries as well as garden supply stores.〔(【引用サイトリンク】url=http://www.ces.ncsu.edu/chatham/ag/SustAg/fertlist.html )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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