The Potassium-Supplying Powers of 20 New Jersey Soils

Diagnosis and Remediation of Nutrient Constraints in Citrus

“…A variety of methods of interpretation have been used from time to time. These include: numerical categories for the range of test values, a procedure called indexing (Cope 1972); graphical methodbased Cate and Nelson procedure (Cate and Nelson 1965); the sufficiency levels of available nutrients (SLAN) based on regression of soil test value with plant growth (Melested and Peck 1977); basic cation saturation ratios (BCSR) suggesting best cation ratio (Bear et al 1945); ionic composition of soil solution-based buffer system (McLean 1982); and DRIS, suited initially for plant analysis interpretation, finds good application to interpreting soil test results (Sumner 1982).…”

Release of Potassium by 18 Ontario Soils During Continuous Cropping in the Greenhouse

“…method. Thus it was possible to calculate (1) the total potassium removed in the tops and roots, (2) the decrease in exchangeable potassium content of the soils, and (3) the amount of non-exchangeable potassium released during the cropping period.…”

Release of non-exchangeable potassium from soils and micaceous minerals during short periods of cropping in the greenhouse

“…K/acre by Arnold and Close (1961) with 20 British soils and perennial rye grass; -23 to 161 lbs. K/acre by MacLean (1961) with 11 Canadian soils and 2 crops of oats, 4 crops of Sudan grass and 3 crops of oats in succession over 2 years* Bear et a_l. ( 1944) in a greenhouse study with 20 New Jersey soils that were cropped successively with alfalfa obtained a release of 195 lbs.…”