BibTeX
@MISC{Peters_sulfurdeficiencies,
author = {John Peters},
title = {SULFUR DEFICIENCIES IN CROP PRODUCTION},
year = {}
}
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Abstract
to experimental plots in Switzerland. Shortly after, Ben Franklin demonstrated response to S by writing “THIS LAND HAS BEEN PLASTERED ” with gypsum on a hillside pasture in Pennsylvania. The incidence of S deficiency is increasing throughout the world and is fairly widespread in Australia, New Zealand, South America and tropical Africa and Asia. In the United States, S deficiency was known in the Pacific Northwest as early as 1900. Since then, S deficiency has been found in many states. The increasing incidence of S deficiency in the past 25 years is primarily due to increased use of high analysis S-free fertilizers, decreased use of S-containing insecticides and fungicides, decreased use of high S fuels, and increased crop yield, requiring more of all essential elements. Response to S by alfalfa in Wisconsin was first demonstrated in 1968 in field plots in northwestern Wisconsin. Early work included field studies, greenhouse and laboratory studies and atmospheric deposition surveys. The need for a reliable diagnostic program for sulfur nutrition in crops was apparent as soon as S deficiency was recognized. Sulfur is present in the soil in both organic and inorganic forms, although nearly 90 % of the total sulfur in most non-calcareous surface soils exists in organic forms. The inorganic forms are
Keyphrases
sulfur deficiency crop production inorganic form field study experimental plot crop yield many state tropical africa organic form s-containing insecticide field plot ben franklin new zealand pacific northwest northwestern wisconsin atmospheric deposition survey non-calcareous surface soil total sulfur reliable diagnostic program south america land plastered laboratory study high fuel high analysis s-free fertilizer essential element sulfur nutrition early work hillside pasture united state
