A hand book of agronomy  / 
by Extension Agronomy Department 
 - Virginia  :   United States Department 
 - Bulletin ; 97 .
<br/><br/> Enc. con otros impresos similares 
<br/><br/><label>LCCN: </label>206450 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cultivos -- variedad <br/>Rotación de cultivos
<br/><br/><label>Dewey Class. No.: </label>PA-C 631.5 B85