By Donald L. Sparks
Advances in Agronomy is still famous as a number one reference and a major resource for the newest examine in agronomy. As continuously, the topics lined are assorted and exemplary of the myriad of material handled via this long-running serial. * keeps the top effect issue between serial courses in agriculture * offers well timed reports on very important agronomy concerns * Enjoys a long-standing popularity for excellence within the box
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Extra resources for Advances in Agronomy
Pesticides) should be evaluated. Accuracy and proper QA/QC controls are essential for in vitro studies. There are many opportunities to introduce error into in vitro methods. Whether by incomplete balance transfer of milligram-sized soil samples to beakers or nonmatrix matched standards for AA or ICP analysis, analytical error is an unexplored and devastating issue for in vitro research particularly when the push is to be faster and cheaper. 2. Common soil extractions to predict risk of phytotoxicity or food-chain risk Many soil extraction tests have been developed to assess phytoavailability of soil elements, especially nutrients required for maximum plant yields.
Considering pH and element chemistry, the monovalent anions and cations are usually leachable. Divalent anions such as sulfate are readily leached, while selenate, molybdate, tungstate, and some others are only leachable at alkaline pH; at acidic pH, these elements can be sorbed well by Fe and other sesquioxides. Advances in Assessing Bioavailability of Metal(Loid)s in Contaminated Soils 23 Arsenate is sorbed well at acidic pH and precipitated as a Ca mineral at higher pH. Arsenic has become a subject of greater concern in recent years as the acceptable intake level for humans was lowered.
Environ. Pollut. A33, 153–162. , and Weitzman, M. (1994). The impact of soil lead abatement on urban children’s blood lead levels: Phase II results from the Boston lead-in-soil demonstration project. Environ. Res. 67, 125–148. 44 Kirk G. Scheckel et al. Basta, N. , and Gradwohl, R. (2000). Estimation of heavy metal bioavailability in smeltercontaminated soils by a sequential extraction procedure. J. Soil Contam. 9, 149–164. Basta, N. , Snethen, K. , and Schroder, J. L. (2001a). Chemical immobilization of lead, zinc, and cadmium in smelter-contaminated soils using biosolids and rock phosphate.