58 



Bledsoe and Blazer (1947) found that red and black medic clovers 

 ( Medicago sp .) were highly responsive to S fertilization on a virgin 

 Leon fine sand. Pensacola bahiagrass showed little or no response to S. 

 Ordinary superphosphate was shown to be an effective source of plant- 

 available S. 



In 1954, Harris et al. found that corn plants in a greenhouse 

 study produced four times more dry matter when S was applied to an 

 Arredondo loamy fine sand as compared to treatments without S. 



Volk and Bell (1945) conducted a study in lysimeters containing a 

 Norfolk loamy fine sand and found that sulfate leaching from gypsum in 

 bands was only 20 to 30% of that from gypsum applied broadcast. 



In 1951, Neller et al. (1951a, 1951b) reported significant 

 responses to added S by clover and clover-grass mixtures on a Rutledge 

 fine sand (Typic Humaquept) in northern Florida, on an Immokalee fine 

 sand (Arenic Haplaquod) in south-central Florida, and on Carnegie and 

 Tifton fine sandy loams (Plinthic Paleudults) in west Florida. Clover 

 failed to grow at all on the Immokalee fine sand where the fertilizer 

 did not contain a source of S. Water-soluble sulfate in the surface 

 soil was less than 1 ppm S where no S was applied and 7 to 9 ppm S 

 where superphosphate or gypsum had been applied. The Ultisols of west 

 Florida failed to produce a response to added S as dramatically as the 

 soils cf the Peninsula. Improved growth of the legume during the 

 cooler months due to S fertilization resulted in higher yields and 

 higher protein content of bahiagrass ( Paspalum notatum Flugge) during 

 the summer months. 



Neller (1956) also studied S as it affected the availability of 

 other nutrients. Plants on most of the soils of Florida which 



