Use of ammonium bicarbonate DTPA soil test to evaluate elemental availability and toxicity

摘要: Abstract The literature published on the use of Soltanpour and Schwab Ammonium Bicarbonate‐DTPA (AB‐DTPA) soil test shows that it can be used to determine availability toxicity indices for many elements. It has been shown an effective measuring P, K, Zn, Fe, Mn, Mo, Pb, Ni, Cd Se. Theoretically, also S, Cu As. AB‐DTPA predict B as well standard hot water rest, although within non‐toxic range B, is not test. alone predicts well, but result requires inclusion pH, organic matter clay contents in a regression equation predicting availability. This suitable determination exchangeable plus soluble Ca Mg (high levels), these precipitate carbonates during extraction. procedure with analysis by inductively...