The invention relates to {HEAD ~ novel urease inhibited fertilizer compositions} containing urea and {TAIL ~ a urease inhibiting amount} of one or more diaminophosphinyl compounds having oxidized sulfur functions, and methods and composition for inhibiting the activity of urease through use of such compounds 
The invention relates to { HEAD ~ novel urease inhibited fertilizer compositions } containing urea and { TAIL ~ a urease inhibiting amount } of one or more diaminophosphinyl compounds having oxidized sulfur functions , and methods and composition for inhibiting the activity of urease through use of such compounds
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