what are the best conditions to spread urea
â¢ On medium and heavy soils, urea can be used for both the first nitrogen application to the soil and for top dressing. â¢ Urea is well suited for top dressing of all soils. â¢ Urea should preferably be spread when into the soil by irrigation. Urea can be applied to soil as a solid or solution or to certain crops as a foliar spray. â¢ Urea usage involves little or no fire or â¢ Ureaâs high analysis, 46% N, helps reduce handling, storage and forms. â¢ Urea manufacture releases few pollutants to the environment.