Average cassava yield was very low (2,479 kg rai -1) due to low soil fertility resulted from long term,
continuous cultivation of cassava without simultaneously improving soil fertility or soil and water
conservation perspective. Therefore, the objective of this experiment was to study the combination
effects of zinc, magnesium and sulphur foliar fertilizer management on yield and quality of cassava
grown on Map Bon, coarse-loamy variant. The Map-Bon, coarse-loamy variant is in the coarseloamy,
mixed, Oxic Paleustults great group soil. The important characteristics of this top soil (0-7/10
and 7/10-32 cm) are : neutral to medium acid soil, sandy loam; weak fine and medium subangular
blocky structure; very friable-friable, non sticky, non plastic; many fine- many fine tubular and many
medium interstitial pores; and few fine-medium roots; granite and quartzite derived soil parent
material; well drainage; moderate permeability; medium run off and surface soil erosion.