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A Review of Midwest Laboratories Soil Test Methods
In 2014, clients in Iowa and Canada asked Midwest Laboratories to compare Mehlich III extraction of nutrients analyzed by ICP to Midwest Laboratories’ traditional methods which include P1 & P2 Bray extraction of phosphorus (P) with colorimetric measurement; neutral ammonium acetate (AA) extraction of potassium (K), magnesium (Mg), and calcium (Ca) with ICP measurement; and
Agriculture related analyses are indispensable in supplying accurate, current information for making management decisions regarding soil fertility and plant nutrients. Maximum benefit can be gained if the samples are taken properly, analyzed reliably, and interpreted correctly. Increasing world demand for food, feed, and fiber, is challenging our present agricultural production systems to satisfy an expanding world population. More food production requires increased acreage devoted to agricultural crops and increased yields.