A preliminary report on the effects of manuring, resting and fertili zer treatments on mean plot yields in the Serere fertility experiment :  cycles 6 and 7. 

 - [s.l. :  Information and visual aids centre,  1972. 
 - 21 p. :  ill. ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers.<br/>Soil fertility.<br/>Crop yields.
<br/><br/><label>Dewey Class. No.: </label>631.81