Norman, A G, ed. <br/><br/>
Agronomy  prepared under the auspices of the American society of agronomy 

 - New York  Academic press  1967 
 - xi,370p.; 22cm. 
 - American society of agronomy .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture Management - America<br/>Growth in the soil<br/>Preservation of seed stocks<br/>Soil phosphorus