Prilled Urea 46% includes 46% of nitrogen (N) in ureic form, conveniently absorbed through the leaves of plants. Absorption through the root system is slower, because urea in soil is converted (as being a results of enzymatic hydrolysis) into the ammonia form available for plants, after which into nitrate form. https://24by7directory.com/listings13586390/dap-fertilizer-msds-options