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- [42] RECYCLING OF SULFUR WASTE OF A SULFURIC-ACID PLANT FOR MAKING SULFUR-COATED UREA RESEARCH AND INDUSTRY, 1991, 36 (04): : 271 - 272
- [43] WINTER LEACHING OF NITRATE FROM AUTUMN-APPLIED CALCIUM NITRATE, AMMONIUM-SULFATE, UREA AND SULFUR-COATED UREA IN BARE SOIL JOURNAL OF AGRICULTURAL SCIENCE, 1976, 87 (OCT): : 381 - 389