Rotational woodlot technology in northwestern Tanzania: Tree species and crop performance

Farmer's Adoption of Rotational Woodlot Technology in Kigorobya Sub-County of Hoima District, Western Uganda

“…Thereafter, the woodlot is left as a source of fuelwood, building poles or fodder while restoring soil fertility. Farmers then start cutting down the trees and growing crops between the stumps four to five years later (Nyadzi et al 2003). Rotational woodlot technology involves growing trees and crops on farms in three inter-related phases: (i) An initial tree establishment phase in which trees are intercropped with crops; (ii) a tree fallow phase; and (iii) a cropping phase after harvesting the trees.…”

“…Some studies in developing countries have stressed a scarcity of fuelwood as one of the key factors to motivate farmers in adopting rotational woodlot technology (Jacovelli & Caevalho 1999, Nyadzi et al 2003. As long as fuel wood could be collected without paying for it, farmers had little incentive to plant fuelwood producing trees (FAO 2003).…”

“…As long as fuel wood could be collected without paying for it, farmers had little incentive to plant fuelwood producing trees (FAO 2003). Nyadzi et al (2003), however, reported that high fuel wood demand stimulates tree production, and that this is only the case when there is a fuel wood crisis. Thus, the high cost www.ethnobotanyjournal.org/vol6/i1547-3465-06-107.pdf of fuel wood may motivate farmers to establish woodlots (Yin & Hyde 2000).…”

The use of Eucalyptus in agroforestry systems of southern Rwanda : to integrate of segregate

“…In E. saligna roots were observed to be concentrated in the top 61 cm soil layer (Skolemann, 1974). Cohen, 1997 report a high density of fine roots in the top 20 cm soil for E. urophylla, while the same was reported in different eucalypt species in different place (Radersma and Ong, 2002;Kidanu, 2005;Nyadzi, 2003). Stone and Kalisz (1991) identified more than 30 tree species that develop roots over long distances, and to a depth of up to 61 m below the ground.…”

Yield Responses of Maize to Organic and Mineral Fertilizers at Different Inclinations in Tropical Smallholder Farming Systems

“…Agroforestry is a valuable alternative in such systems for regenerating soil fertility, and thus enhancing food security and household income, especially where mineral fertilizers are too expensive for smallholder farmers Kimaro et al, 2008). Trees in agroforestry offer diverse advantages like biological nitrogen fixation, nutrient recycling from deeper soil layers and minimization of leaching and soil erosion (Nyadzi et al, 2003). A number of studies revealed the benefits of Gliricidia for soil fertility (Ikerra et al, 1999;Chiwara et al, 2003;Makumba et al, 2005;Akinnifesi et al, 2009).…”