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- [7] EVALUATION OF THE SULFUR STATUS OF SOME SOILS FROM PORTUGAL ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE, 1995, 158 (01): : 105 - 107
- [10] SULFUR STATUS OF SOME VOLCANIC ASH DERIVED SOILS IN CHILE AGROCHIMICA, 1971, 16 (1-2): : 77 - +