Abstract
Abstract Changes that take place in soil samples as they are dried and stored may pose serious problems in predicting plant responses compared to moist soils under field conditions. The effects of drying and storage techniques (air, microwave, oven‐drying, and frozen) on the levels of Mehlich‐I‐extractable nutrients were evaluated in six diverse soils. The use of microwave‐drying as a rapid soil drying method prior to chemical analysis was also evaluated. Drying and freezing caused large changes in the levels of extractable nutrients in all soils. The effects of drying were dependent on drying intensity and the initial physical and chemical properties of the soil. Many of the changes in the levels of extractable nutrients resulting from drying the soil appear to be associated with the oxidation of organic matter (OM) and changes in hydration state and redox status of different soil components. Results from this study also indicate that microwave drying of soils has potential for rapid drying of soil sampl...
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