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