Rarrabawar saturating na tushe

Base-cation saturation ratio (BCSR) is a method of interpreting soil test results that is widely used in sustainable agriculture, supported by the National Sustainable Agriculture Information Service (ATTRA)NCat Soil Management and claimed to be successfully in use on over a million acres (4,000 km2) of farmland worldwide. The traditional method, as used by most university laboratories, is known variously as the 'sufficiency level', sufficiency level of available nutrients (SLAN), or Index(UK) system. The sufficiency level system is concerned only with keeping plant-available nutrient levels within a well studied range, making sure there is neither a deficiency nor an excess. In the BCSR system, soil cations are balanced according to varying ratios often stated as giving 'ideal' or 'balanced' soil. These ratios can be between individual cations, such as the calcium to magnesium ratio, or they may be expressed as a percentage saturation of the cation exchange capacity (CEC) of the soil. Most 'ideal soil' theories stress both approaches. (See also – Cation exchange capacity)

A takaice dai, 'tushe' cations suna iyakance ga calcium, Magnesium, potassium, da sodium, kuma waɗannan sune abubuwan gina jiki na farko waɗanda hanyoyin BCSR suka fi damuwa da daidaitawa. Koyaya, yawancin masu goyon bayan ka'idodin 'ƙasa mai kyau' suma suna jaddada muhimmancin daidaita anions phosphorus, sulphur da chlorine da kuma ƙananan abubuwa da yawa. Tsarin SLAN na al'ada ba ya gwadawa ga ƙananan abubuwa da abubuwan ganowa sai dai idan akwai isasshen dalilin da zai iya zargin rashi ko guba.

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