Search Results - "Franke, A.C"

Sustainable intensification through rotations with grain legumes in Sub-Saharan Africa: A review by Franke, A.C., van den Brand, G.J., Vanlauwe, B., Giller, K.E.

“…•We retrieved 44 publications and 199 observations comparing continuous cereal with grain legume-cereal rotation in SSA.•Cereal after legume yielded on average…”
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Exploring the yield gap of orange-fleshed sweet potato varieties on smallholder farmers’ fields in Malawi by van Vugt, D., Franke, A.C.

“…•The performance of six sweet potato varieties was evaluated at 221 sites in Malawi.•Farmers only achieve about 30% of attainable yields; the yield gap is…”
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N2-fixation and N contribution by grain legumes under different soil fertility status and cropping systems in the Guinea savanna of northern Ghana by Kermah, M., Franke, A.C., Adjei-Nsiah, S., Ahiabor, B.D.K., Abaidoo, R.C., Giller, K.E.

“…•Cropping system and soil fertility effects on N2-fixation were tested in northern Ghana.•More N2 is fixed in sole cropping than intercropping despite…”
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Fertiliser requirements for balanced nutrition of cassava across eight locations in West Africa by Ezui, K.S., Franke, A.C., Mando, A., Ahiabor, B.D.K., Tetteh, F.M., Sogbedji, J., Janssen, B.H., Giller, K.E.

“…•Nutrient use efficiency of cassava increases at balanced nutrition.•Benefice:cost ratio of fertiliser use increases at balanced nutrition of cassava.•Improved…”
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Understanding variability in the benefits of N2-fixation in soybean-maize rotations on smallholder farmers’ fields in Malawi by van Vugt, D., Franke, A.C., Giller, K.E.

“…•N2-fixation depends on genetic, environmental, management and socio-economic factors.•More productive and wealthier farmers benefit most from soybean-maize…”
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Benefits of legume–maize rotations: Assessing the impact of diversity on the productivity of smallholders in Western Kenya by Ojiem, J.O., Franke, A.C., Vanlauwe, B., de Ridder, N., Giller, K.E.

“…•Agronomic and economic performance of legume–maize rotations was tested in western Kenya.•Poorer rainfall and fertility gave lower legume and maize yield, and…”
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Simulating drought impact and mitigation in cassava using the LINTUL model by Ezui, K.S., Leffelaar, P.A., Franke, A.C., Mando, A., Giller, K.E.

“…•Drought stress can generate up to 59% storage root yield losses.•Storage root yield losses were higher when long drought stress occurred between 2.5–4 months…”
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Resource use efficiencies as indicators of ecological sustainability in potato production: A South African case study by Steyn, J.M., Franke, A.C., van der Waals, J.E., Haverkort, A.J.

“…•Actual yields were on average 60% of potential yield, suggesting fairly efficient use of available resources.•Water, seed and nutrient use efficiencies…”
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Which farmers benefit most from sustainable intensification? An ex-ante impact assessment of expanding grain legume production in Malawi by Franke, A.C., van den Brand, G.J., Giller, K.E.

“…•An ex-ante impact analyses helped to identify niches for legume technologies.•Grain legumes have a good potential as low-risk cash crops.•With proper…”
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Water and radiation use efficiencies explain the effect of potassium on the productivity of cassava by Ezui, K.S., Franke, A.C., Leffelaar, P.A., Mando, A., van Heerwaarden, J., Sanabria, J., Sogbedji, J., Giller, K.E.

“…•Potassium affects more the efficiency of converting light into dry matter than the amount of light intercepted.•Potassium effects on cassava productivity are…”
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Understanding variability in soybean yield and response to P-fertilizer and rhizobium inoculants on farmers’ fields in northern Nigeria by Ronner, E., Franke, A.C., Vanlauwe, B., Dianda, M., Edeh, E., Ukem, B., Bala, A., van Heerwaarden, J., Giller, K.E.

“…•Soybean yields increased strongly with P-fertilizer and rhizobium inoculants.•Inoculants alone or applied together with P are more profitable than P…”
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Grower perceptions of biotic and abiotic risks of potato production in South Africa by van der Waals, J.E., Steyn, J.M., Franke, A.C., Haverkort, A.J.

“…Growers' surveys took place in all sixteen potato growing regions of South Africa in 2013 and 2014. The agro-ecological climate of these regions is diverse and…”
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Developing environmental principles, criteria, indicators and norms for potato production in South Africa through field surveys and modelling by Franke, A.C., Steyn, J.M., Ranger, K.S., Haverkort, A.J.

“…► A method to assess sustainability of crop production is applied to South African potato. ► A farmer survey and crop model outcomes are used to quantify…”
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HER-family gene amplification and expression in resected pancreatic cancer by te Velde, E.A, Franke, A.C, van Hillegersberg, R, Elshof, S.M, de Weger, R.W, Borel Rinkes, I.H.M, van Diest, P.J

“…Abstract Aims Despite surgical resection, pancreatic cancer carries a poor prognosis. In search for new molecular therapeutic targets, we investigated the…”
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Evaluating and scaling-up integrated Striga hermonthica control technologies among farmers in northern Nigeria by Franke, A.C., Ellis-Jones, J., Tarawali, G., Schulz, S., Hussaini, M.A., Kureh, I., White, R., Chikoye, D., Douthwaite, B., Oyewole, B.D., Olanrewaju, A.S.

“…The results are presented of a project to promote integrated Striga control (ISC) technologies to farmers in the Guinea savanna of northern Nigeria. Extension…”
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Long-term water quality assessments under changing land use in a large semi-arid catchment in South Africa by Mararakanye, N., Le Roux, J.J., Franke, A.C.

“…Increasing nutrient loads from land use and land cover (LULC) change degrade water quality through eutrophication of aquatic ecosystems globally. The Vaal…”
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Using satellite-based weather data as input to SWAT in a data poor catchment by Mararakanye, N., Le Roux, J.J., Franke, A.C.

“…Satellite-based weather estimates are spatially and temporally continuous data that seamlessly capture weather variability across the globe. A need was…”
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Assessing evapotranspiration and crop coefficients of potato in a semi-arid climate using Eddy Covariance techniques by Machakaire, A.T.B., Steyn, J.M., Franke, A.C.

“…A correct estimation of crop coefficients (KC) is essential to assess water requirements of crops from weather variables and thereby optimize irrigation…”
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Understanding cassava yield response to soil and fertilizer nutrient supply in West Africa by Ezui, K.S, Franke, A.C, Ahiabor, B.D.K, Tetteh, F.M, Sogbedji, J, Janssen, B.H, Mando, A, Giller, K.E

“…Background and aims: Enhanced understanding of plant and nutrient interactions is key to improving yields. We adapted the model for QUantitative Evaluation of…”
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Robust Potato Model: LINTUL-POTATO-DSS by Haverkort, A. J, Franke, A. C, Steyn, J. M, Pronk, A. A, Caldiz, D. O, Kooman, P. L

“…In 1994, LINTUL-POTATO was published, a comprehensive model of potato development and growth. The mechanistic model simulated early crop processes (emergence…”
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