Year/book of agriculture 
 Fa/mers in a changing world  Climate and man  Keeping livestock healthy  Science in fa/ming  Grass  Trees  Crops in peace and war  Insects  Plant diseases  Water 

 - 1189 páginas :  ill., ports., mapas ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultura--Estados Unidos.
<br/><br/><label>LC Class. No.: </label>S21  / .A35