Assertion: percent urea | /r/HasSubevent | a 1:1:0 n:p 2 o 5 :k 2 o ratio
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text: I now believe that the difficulty encountered in attempts to granulate these ratio grades can be explained with the aid of published data that show that the freezing temperature of mixtures of urea and urea phosphate with 20 to 60 percent urea is severely depressed in the presence of water and that the lowest solidification temperature is with 40 percent urea which would result in a 1:1:0 N:P 2 O 5 :K 2 O ratio.