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9. SULFUR IN BAHIAGRASS AND BERMUDAGFASS IN 



THE FIELD 124 



9.1 SULFUR IN BAHIAGRASS ON A MYAKKA FINE SAND 124 



9.2 SULFUR IN BERMUDAGRASS ON A KENDRICK FINE SAND. ... 134 



9.3 FORAGE SULFUR CONCENTRATIONS AND N:S RATIOS 143 



10. SOURCES AND CYCLING OF SULFUR IN THE FIELD 146 



V. SUMMARY AND CONCLUSIONS 151 



BIBLIOGRAPHY 153 



APPENDICES 167 



A. DIGESTION PROCEDURE FOR ESTIMATION OF TOTAL SULFUR 



IN PLANT TISSUE 163 



B. DIGESTION PROCEDURE FOR ESTIMATION OF TOTAL SULFUR 



IN SOILS 169 



C. PROCEDURE FOR THE TURBIDIMETRIC DETERMINATION OF 



SULFATES IN SOIL EXTRACTS, DIGESTED SOIL EXTRACTS, 



AND DIGESTED PLANT TISSUE 170 



D. AN INDIRECT METHOD FOR THE DETERMINATION OF SULFATES 



IN SOIL EXTRACTS 172 



E. MEAN AND TOTAL VALUES FOR FOUR HARVESTS OF A SORGHOM- 



SUDANGRASS CROP IN THE GREENHOUSE 173 



F. THE EFFECT OF HORIZON SEQUENCE AND SULFUR ON ROOT 



DRY MATTER YIELD AT HARVEST , 174 



G. NUTRIENT LEVELS IN COMPOSITE SAMPLES FROM EXPERIMENTAL 



AREAS AT THE BEEF RESEARCH UNIT AND AT GREEN ACRES 



AGRONOMY FARM 175 



H. RAINFALL DISTRIBUTION AT THE BEEF RESEARCH UNIT, 



GAINESVILLE, FLORIDA, FOR 1978 AND 1979 176 



VITA 177 



VI 



