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Sulfate‐Sulfur Concentration as an Indicator of Sulfur Status in Various California Dryland Pasture Species
Author(s) -
Jones Milton B.,
Martin W. E.
Publication year - 1964
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1964.03615995002800040026x
Subject(s) - trifolium subterraneum , pasture , wilting , agronomy , fertilizer , growing season , sulfur , biology , chemistry , organic chemistry
Abstract 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 SO 4 ‐S values of annual grasses including soft chess were higher than those of rose or subclover. Hardinggrass was particularly high in SO 4 ‐S. Where no N was applied the SO 4 ‐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 SO 4 ‐S values increased over SO 4 ‐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.