Sulfur deficiency widespread: Areas in 34 of California's 58 counties found to have soils deficient in nutrient essential for normal growth of plants
W. E. Martin, University of California
California Agriculture 12(11):10-12. DOI: 10.3733/ca.v012n11p10.
W. E. Martin is Extension Soils Specialist, University of California, Berkeley.
Abstract Not Available – First paragraph follows:
The frequency of sulfur deficiency in California soils ranks sulfur a close third—after nitrogen and phosphorus—as a major plant nutrient which must be supplied to maintain crop production.
The data for this statewide survey of sulfur deficient areas were furnished by Farm Advisors of the University of California.