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 {HEAD ~ methods} and composition for inhibiting {TAIL ~ the activity} of 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 { HEAD ~ methods } and composition for inhibiting { TAIL ~ the activity } of urease through use of such compounds
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