Ingram, Julie <br/><br/>
The role of trees in maintaining and improving soil productivity: a review of the literature 

 - London:  Commonwealth Science Council  1990 
 - 39p.: ill. 
 - Agriculture Progamme, series number CSC(90) AGR-15.Technical paper 279 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>SOIL SCIENCE<br/>PLANT DISEASES<br/>AGRICULTURE<br/>AGRONOMY
<br/><br/><label>LC Class. No.: </label>COMM(02)