Nitrogen In Crop Production Proceedings Of A Symposium Held 25 27 May 1982 At Sheffield Alabama Sponsored By The National Fertilizer Development Center Of The Tennessee Valley Authority Et Al Roland D Hauck Editor In Chief 

 -  Madison Wis. : American Society Of Agronomy 1984. 
 - 804 
<br/><br/><br/>Eng 
<br/><br/><label>ISBN: </label>891180818