Statistics of crop responses to fertilizers 

 - Rome  Food and Agriculture Organization         1966 
 - viii, 112p. Appendix p.67-112  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>J3:24:(B28), K6/UN