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Message definition (Fertilizer ) Urea is usually spread at rates of between 40 and 300 kg/ha (35 to 270 lbs/acre) but rates vary. Smaller applications incur lower losses due to leaching. During summer, urea is often spread just before or during rain to minimize losses from [[ammonia volatilization from urea|volatilization]] (a process wherein nitrogen is lost to the atmosphere as ammonia gas).
尿素は通常、40〜300kg/ha（35〜270lbs/エーカー）の割合で散布されるが、その割合は様々である。少量施用の場合、浸出 による損失が少ない。夏期には、揮発 （窒素がアンモニアガスとして大気中に失われるプロセス）による損失を最小限に抑えるため、尿素は雨の直前または降雨中に散布されることが多い。