Green manure/ cover crops and crop rotation in conservation agriculture on small farms / 
Florentin, Miguel Angel, Penalva, Marcos and oth.; Trl. J. McDonald Melissa; FAO Fiat Panis; Plant production and protection division  
 - Rome :  Food and agricultura organization of the United Nations ,  2011 . 
 - 97 p. :  ill. ;  25 sm. 
 - Integrated crop management   Vol. 12-2010 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture