Different definitions
1. Nitrogen fertilizer: refers to the unit fertilizer with nitrogen as the main component, with the marked amount of nitrogen, which can provide nitrogen nutrition for plants when applied to the soil.
2. Urea: refers to the organic compound composed of carbon, nitrogen, oxygen and hydrogen, which belongs to neutral fertilizer, also known as "urea" and "carboamide".
Different appearance
1. Nitrogen fertilizer: except that ammonia water and liquid ammonia are in liquid form, other nitrogen fertilizers are in solid granular or crystalline form.
2. Urea: white crystal in appearance.
Different applicability
1. Nitrogen fertilizer: there are many kinds, including urea, which should be used according to the actual situation. High concentration ammonium nitrogen is easy to poison crops, and nitrate nitrogen is easy to be reduced to gas state through denitrification, which will be lost from the soil at this time.
2. Urea: easy to store and use, suitable for all kinds of soil and plants, with little damage to the soil.
