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Growth and N uptake in pot-grown maize, beans, and cassava were evaluated under 2 levels of soil N at CIAT-Palmira (Colombia). The lower amount of the element reduced its uptake by the 3 species, resulting in lower tissue concn., especially in the leaves. Under low N, DM accumulation was also red...


Porto, M.C.M.El-Sharkawy, Mabrouk A.Cock, James H.Hernández, A. del P.Cadena, G. de[Crescimento, fotossintese e eficiencia do uso de nitrogenio em milho, feijao e mandioca submetidos a dois niveis de N no solo]Crescimento, fotossintese e eficiencia do uso de nitrogenio em milho, feijao e mandioca submetidos a dois niveis de N no solo
Manda, J.Alene, Arega D.Gardebroek, C.Kassie, M.Tembo, G.[Adoption and impacts of sustainable agricultural practices on maize yields and incomes: evidence from rural Zambia]Adoption and impacts of sustainable agricultural practices on maize yields and incomes: evidence from rural Zambia
Musinguzi, P.Ebanyat, PeterTenywa, J.S.Basamba, T.A.Tenywa, M.M.Mubiru, D.[Precision of farmerbased fertility ratings and soil organic carbon for crop production on a Ferralsol]Precision of farmerbased fertility ratings and soil organic carbon for crop production on a Ferralsol
Fatondji, D.Martius, C.Zougmoré, Robert B.Vlek, Paul L.G.Bielders, Charles L.Koala, Saidou[Decomposition of organic amendment and nutrient release under the zai technique in the Sahel]Decomposition of organic amendment and nutrient release under the zai technique in the Sahel

On-farm and on-station field experiments were carried out to determine the potential of combining Bacillus subtilis with soil fertility management practices on plant parasitic nematodes and growth of common bean (Phaseolus vulgaris). The treatments were Bacillus subtilis (isolate K194), B. subtil...


Wepuhkhulu, MKimenju, J.W.Anyango, BWachira, PKyallo, G[Effect of soil fertility management practices and bacillus subtilis on plant parasitic nematodes associated with common bean, Phaseolus vulgaris]Effect of soil fertility management practices and bacillus subtilis on plant parasitic nematodes associated with common bean, Phaseolus vulgaris

The abundance and diversity of soil mites was monitored along a gradient of land use types (LUTs) during the wet seasons in soils of Taita Taveta, Kenya. Sampling of mites from soils was carried out in eight LUTs which included maize-based system (Zea mays), coffee (Coffea Arabica), horticulture,...


Maribie, CWNyamasyo, GHNNdegwa. PNMung'atu, Joseph K.Lagerlof, JGikungu, M[Abundance and diversity of soil mites (Acari) along a gradient of land use types in Taita Taveta, Kenya]Abundance and diversity of soil mites (Acari) along a gradient of land use types in Taita Taveta, Kenya

Theories of agrarian change in Africa normally treat agricultural intensification as a linear unidirectional process that gradually engulfs entire agrarian systems as human population increases. Focusing on soil management practices, this paper disputes the alleged uniformity of intensification a...


Crowley, E.L.Carter, Simon E.[Agrarian change and the changing relationships between toil and soil in Maragoli, Western Kenya (1900-1994)]Agrarian change and the changing relationships between toil and soil in Maragoli, Western Kenya (1900-1994)

Nitrogen (N) deficiency is a major constraint to the productivity of the African smallholder farming systems. Grain, green manure and forage legumes have the potential to improve the soil N fertility of smallholder farming systems through biological N2-fixation. The N2-fixation of bean (Phaseolus...


Ojiem, JOVanlauwe, BernardRidder, N.A. deGiller, Ken E.[Niche-based assessment of contributions of legumes to the nitrogen economy of Western Kenya smallholder farms]Niche-based assessment of contributions of legumes to the nitrogen economy of Western Kenya smallholder farms

A major strategy towards addressing soil fertility depletion is the conservation and sustainable use of rhizobia that are able to fix nitrogen in the soil in association with legumes. The study assessed abundance and diversity of legume nodulating rhizobia (LNB) in soils collected from six differ...


Mwenda, George M.Karanja, Nancy M.Boga, Hamadi M.Kahindi, James M.Muigai, A.M.Odee, D[Abundance and diversity of legume nodulating rhizobia in soils of Embu district, Kenya]Abundance and diversity of legume nodulating rhizobia in soils of Embu district, Kenya

Manure is a key nutrient resource on smallholder farms in the tropics, especially on poorly buffered sandy soils, due to its multiple benefits for soil fertility. Farmers preferentially apply manure to fields closest to homesteads (homefields), which are more fertile than fields further away (out...


Zingore, ShamieDelve, Robert J.Nyamangara, JusticeGiller, Ken E.[Multiple benefits of manure : The key to maintenance of soil fertility and restoration of depleted sandy soils on African smallholder farms]Multiple benefits of manure : The key to maintenance of soil fertility and restoration of depleted sandy soils on African smallholder farms

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