| http://www.w3.org/ns/prov#value | - As defined, the Critical Level is ??????the soil test above which the soil can supply adequate quantities of nutrient to support optimum economic growth.??? When soil test levels are above the critical level ??????the soil is capable of supplying the nutrient required by the crop and no response to fertilizer would be expected.??? Further when the soil test level is below the Critical Level ??????
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