Cassava is the most important starchy root crop grown in Uganda.  Cassava was introduced to Uganda through Tanzania by Arab traders between 1862 and 1875; the crop played a significant role to overcome food shortage. Underground tuber is rich in starch and mainly consumed after cooking.  Being easily digestible, it forms and important ingredient in poultry and cattle-feeds.  It is also widely used for production of industrial alcohol, starch and glucose.

Land is ploughed or dug properly for loosening soil to a depth of 20-25 cm.  Depending on texture of soil and slope of land, mounds or ridges or raised beds are prepared.  Mounds of 25-30 cm height are prepared in poorly drained soils.  Ridges of 25-30 cm length are made in sloppy land for a rainfed crop and in levelled for irrigated crop.  Ridges are taken across the slope.  Flat raised beds are taken in level lands having good drainage.  Since cassava mosaic disease is a serious problem, care should be taken to select disease-free stakes for preparation of sets.  Raising sets initially in raised beds by planting very close (400 sets/m2), roguing out diseased plants and uprooting disease-free sets for planting at 3 weeks age ensure disease-free seedlings.

Sets of 25-30 cm length are planted vertically in beds, mounds or ridges to a depth of 5 cm.  Care should be taken to avoid planting of sets inverted.  Normally erect and non-branching varieties are planted at 75 x 75 cm and branching or semi-branching varieties at 90 x 90 cm. In case, sets are dried after planting, replace it with sets of longer size, as early as possible.  At time of planting, 5 % of stakes may be planted as reserve in field, separately at a closer spacing of 4 x 4 cm for gap filling after 20-25

Cassava is a heavy feeder and crop is to be adequately manured for getting high yield.  Apply 125 tonnes of farmyard manure/ha as basal dose.  For high yielding varieties, a fertilizer dose of 50 kg N, 50 kg P202, and 50 kg K2O/ha is recommended at the time of land preparation.  If planting of sets is done during hot condition, basal dose of fertilizers and manures may be postponed to one month after planting. This will avoid attack of termites and drying up of sets.  Apply second dose of fertilizer i.e. 50 kg N and 50 kg K20, 45-50 days after planting along with weeding and earthing up.  In short duration varieties, fertilizer dose can be reduced to 75:50-:75 kg NPK/ha.

Cassava is grown mainly as a rainfed crop and irrigating the crop at 25 % available moisture depletion level, could double tuber yield compared.

Interculture operations are aimed at removing weeds in early stages of crop and to improve physical condition of sets for proper tuber development.  First interculture operation may be done sufficiently deep at 45-60 days after planting and a shallow interculture by way of weeding or earthing up may be given one month after the first.

Two groups of spider mites occur during dry season from January to May.  One group Tetramycychus cinnabarinus and T. neocaledonicus feed on under surface of leaves causing elongated streaks, chlorosis and withering of leaves.   In severe cases, it covers the upper surface also.  The other group Eutetramychus orientalis and Oligonychus biharensis feed on upper surface of leaves causing depletion of chlorophyll, resulting in typical rusted leathery appearance. Curling of leaves starting from margins is also noticed.  Water spray at run-off level, spraying neem oil or demethoate (0.05 %) is effective for control of mites.

Scale insect (Anoidomytellus albus) attack stem when stacked and occasionally in field causing drying.  Storing of stem in vertical position and spraying dimethoate (0.05 %) will be effective for control of insect.

Termites (Odontotermes obesus) and white grubs (Leucopholis coneophora) infest roots causing drying up of plants.  In severe cases, follow soil application of insecticides.

Cassava Mosaic Disease is the most serious problems of cassava cultivation and is caused by gemini virus.  Infested plants show reduction in leaf size and stunted growth, curling and typical mosaic pattern.  Though quality is not reduced, yield reduction is considerable.  Field sanitation, selecting of disease free stem for planting, control of vector (white fly-Bemmisia tabaci), growing tolerant varieties are recommended for reducing disease incidence.

Tuber rot caused by Phytophthora dreschleri.  This is more in ill-drained soils, infected tubers show brown discoloration of internal tissues and become rotten and emit foul smell.  Remove infected tubers and apply Trichoderma.

Crop is ready for harvesting in 10-11 months after planting.  Short duration varieties can be harvested in 6-7 months.  Delayed harvest results in deteriorating of quality of  tubers.  Harvesting is usually done by uprooting plants gently by holding stem.  After harvesting, stack stems vertically in well aerated place for use in subsequent planting.