| abstract |
Fertilizers containing urea with urease inhibitors, wherein the urease inhibitors are bromo-nitro compounds having the formula: <IMAGE> wherein A1 is (CH2)n1X1, and A2 is (CH2)n2X2, wherein both n1 and n2 and X1 and X2 are the same or different, the alkyl groups of A1 and A2 are straigh-chain or branched-chain alkyl groups, and the substituents X1 and X2 are attached to any one of the carbon atoms of the alkyl groups, and n1 and n2 are 0 to 6, X1 and X2 are H or YR, wherein Y is -O-, -S- or -NH- and R is H or a straight or branched chain C1-C6 alkyl, cyclopent(en)yl cyclohex(en)yl or phenyl group having one to three methyl groups or <IMAGE> attached thereto, and R1 is H or a straight or branched chain C1-C6 alkyl, cyclopent(en)yl or cyclohex(en)yl group having one to three methyl groups or <IMAGE> attached thereto. |