Silva Martins, Paulo Fernando da <br/><br/>
Perspectives on the qualitative and quantitative improvement of humus in soils of the eastern amazon region 

<br/><br/>bibliogr. p. 118 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sol<br/>Humus<br/>Fertilité sol
<br/><br/><label>Subjects--Index Terms: </label>Brésil