Urea is one of the most‑widely‑used high‑nitrogen fertilizers, containing 46% nitrogen, and it works for nearly all field crops, fruits and vegetables.
It fits grain crops such as wheat, corn, rice and sorghum, helping leaf growth and boosting tillering. For cash crops including cotton, soybeans, peanuts, sugarcane and tobacco, urea promotes plant vigor and improves yield. It also performs well for fruit trees like apple, citrus, banana and grape, as well as common vegetables: tomato, cucumber, cabbage and pepper.
There are two main application ways: soil application and foliar spraying.
When spreading onto soil, apply urea before watering or rainfall. Do not place it too close to seeds or young roots, otherwise high nitrogen concentration may burn roots and seedlings. Avoid surface spreading under hot sunny days; part of nitrogen will volatilize into the air and reduce fertilizer efficiency.
Foliar spray is popular for quick nitrogen supplement. Dissolve urea into water for leaf spraying. Keep low concentration: 0.5%‑1% for field crops, 0.3%‑0.5% for fruit trees and vegetables. Spray in early morning or late afternoon, never spray at noon under strong sun. Do not mix with strong alkaline agrochemicals.