Boesen, Jannik. <br/><br/>
Soil fertility management in semi-arid agriculture in Tanzania :   farmers' perceptions and management practices /  
Jannick Boesen & Esb ern Friis-Hansen. 
 - Copenhagen, Denmark :   Centre for Development Research,   c2001. 
 - 31 p. ;    30 cm. 
 - CDR working paper   01.10   0904-4701 ;  .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil fertility--------