Upland rice is an important cash crop in many areas of eastern and southern Tanzania, including Morogoro Rural and Kyela districts. Under continuous cultivation, rice yields have been in decline in recent years. This is associated with falling soil fertility and an increase in infestation by the parasitic witchweed, Striga asiatica. Working with farmers in Kyela since 1996, CPP project R7564 demonstrated that up to 60 percent reduction in Striga numbers and a 45 percent increase in rice yield could be achieved by applying urea fertiliser. However, farmers could not widely adopt the use of urea because they lacked liquidity for fertilizer purchase. The following technology promotes using green manure species Crotalaria ochroleuca, (sunn hemp; also called "Marejea" in Kiswahili), to manage Striga asiatica and improve soil fertility in upland rice in Tanzania.