ffect of drip irrigation on the production and economic returns of sorghum (sorghum bicolor) in semi arid areas of Tanzania

Field trials were conducted in semi arid area of Dodoma, central Tanzania with the aim of
assessing the effect of three drip irrigation watering regimes on the production and economic
returns of sorghum (Sorghum bicolor). The irrigation treatments were: EM (early in the
morning), EL (late in the evening) and ELE (both early in the morning and late in the evening).
Each treatment was replicated three times in a RCBD for two seasons (dry and wet season).
The results showed that both sorghum growth parameters and yield were significantly higher by
a factor of >2 (p < 0.05) when the crop was irrigated early in the morning and late in the evening
than when it was irrigated either early in the morning or late in the evening. The maximum yield
of 13.12 ton/ha with economic returns of Tanzania shilling 6,675,900 /= was obtained when
sorghum was irrigated twice a day in the dry season. The results indicated that, although
irrigating twice a day in the dry season resulted into higher yield, the net income was higher
(7,607,780/=) in dry-wet season.