Sulfate-Sulfur Concentration as an Indicator of Sulfur Status in Various California Dryland Pasture Species1
- Milton B. Jones2 and
- W. E. Martin3
Sulfate-sulfur values in subclover and soft chess under high N fertilizer were approximately equal over a wide range of S fertilizer levels. With no fertilizer N the SO4-S values of annual grasses including soft chess were higher than those of rose or subclover. Hardinggrass was particularly high in SO4-S. Where no N was applied the SO4-S concentration in subclover decreased as the plants advanced from early vegetative to flowering stage. When plants began to wilt at the end of the season, the SO4-S values increased over SO4-S levels at flowering. Subclover and rose clover, sampled during the flowering period but before wilting, appeared to be the best plants for determining the S status of dryland pastures in California.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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