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Eric Danquah
Department of Plant, Soil and Microbial Sciences, Michigan State University, 1066 Bogue St., East Lansing, MI 48824, USA

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Journal article
Published: 22 September 2020 in Agriculture
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Modelling and multiple linear regression were used to explore the reason for low maize yield in the Atebubu-Amantin and West Mamprusi Districts of Ghana, West Africa. The study evaluated maize yields on twenty farms against measures of soil fertility, agronomic attributes and soil water availability. Correlations between yield, soil fertility, rain, crop density, and weed biomass, were low, and no single factor could explain the low yields. A 50-year virtual experiment was then set up using the Agricultural Production Systems Simulator (APSIM) to explore the interactions between climate, crop management (sowing date and nitrogen fertilization) and rooting depth on grain yield and nitrate (NO3-N) dynamics. The analysis showed that a lack of optimal sowing dates that synchronize radiation, rainfall events and nitrogen (N) management with critical growth stages explained the low farm yields.

ACS Style

Eric Danquah; Yacob Beletse; Richard Stirzaker; Christopher Smith; Stephen Yeboah; Patricia Oteng-Darko; Felix Frimpong; Stella Ennin. Monitoring and Modelling Analysis of Maize (Zea mays L.) Yield Gap in Smallholder Farming in Ghana. Agriculture 2020, 10, 420 .

AMA Style

Eric Danquah, Yacob Beletse, Richard Stirzaker, Christopher Smith, Stephen Yeboah, Patricia Oteng-Darko, Felix Frimpong, Stella Ennin. Monitoring and Modelling Analysis of Maize (Zea mays L.) Yield Gap in Smallholder Farming in Ghana. Agriculture. 2020; 10 (9):420.

Chicago/Turabian Style

Eric Danquah; Yacob Beletse; Richard Stirzaker; Christopher Smith; Stephen Yeboah; Patricia Oteng-Darko; Felix Frimpong; Stella Ennin. 2020. "Monitoring and Modelling Analysis of Maize (Zea mays L.) Yield Gap in Smallholder Farming in Ghana." Agriculture 10, no. 9: 420.

Preprint
Published: 19 November 2018
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With about 70% of yam tuber been water, yield is critically affected during bulking as a result of onset of temporal drought. As a consequence of climate change, farmers who are into Dioscorea rotundata (white yam) production for local and international market lose their investments mainly due to erratic precipitation, drought spells culminating into low yields of just 12t/ha compared to the potential of about 22-49t/ha depending on the variety. Innovative land uses technologies with higher and sustained productivity for yam production are imperative. This study verifies improved agronomic package for sustainable yam production in yam growing areas in the forest – savannah transition zone of Ghana during the 2015 and 2016 cropping seasons. The improved agronomic package included use of ridging as seedbed, seed treatment before planting, fertilizer application at a rate of 30:30:36 N:P205:K20 kg/ha plus 15 kg/ha Mg and 20 kg/ha S as MgSO4 and the use of minimum stakes (trellis; 30-50% less number of stakes used by farmers staking). This was compared with farmers’ practice which consisted of mounding, no fertilizer application and no seed treatment. The results revealed significant (P ≤ 0.01) yam yields of more than 60% difference between the improved agronomic practice and farmers’ practice from Ejura, Atebubu and Kintampo yam growing communities. Adoption of improved agronomic practices does not only sustain yam production and address deforestation but also provide higher returns on investments promoting climate resilience by small holders.

ACS Style

Felix Frimpong; Danquah E. Owusu; Stella Ama Ennin; Henry Asumadu; Atta Kwasi Aidoo; Norbert Maroya; Eric Owusu Danquah. Sustaining yam yields amidst climate threat in the forest – savannah transition zone of Ghana. 2018, 474247 .

AMA Style

Felix Frimpong, Danquah E. Owusu, Stella Ama Ennin, Henry Asumadu, Atta Kwasi Aidoo, Norbert Maroya, Eric Owusu Danquah. Sustaining yam yields amidst climate threat in the forest – savannah transition zone of Ghana. . 2018; ():474247.

Chicago/Turabian Style

Felix Frimpong; Danquah E. Owusu; Stella Ama Ennin; Henry Asumadu; Atta Kwasi Aidoo; Norbert Maroya; Eric Owusu Danquah. 2018. "Sustaining yam yields amidst climate threat in the forest – savannah transition zone of Ghana." , no. : 474247.

Journal article
Published: 12 October 2014 in Sustainable Agriculture Research
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The study evaluated staking options to address the problem of deforestation for sustainable yam production in the Forest and Forest-Savannah Transition zones of Ghana. A split-plot design with three yam varieties (Dente, Water Yam and TDR95/19177 line) and three staking options (No staking, Vertical staking and Trellis with 50% and 30% number of vertical stakes for 2012 and 2013 respectively) as main plots and subplots respectively were used. Results revealed a significant (P < 0.05) interaction between yam variety and staking options on yam tuber yields in both locations and years. While water yam had similar tuber yields under all staking options, Dente and TDR95/19177 under no staking had significant yield reductions ranging from 37 to 65% compared to the other staking options. The observed yield reduction under no staking of Dente and TDR95/19177 could be attributed to higher incidence of yam mosaic virus leading to significantly lower fresh leaf biomass production. Reducing the number of stakes in trellis to as low as 30% of the vertical/optimum staking option did not result in a significant reduction in tuber yields for TDR95/19177 and Water yam. The economic analysis revealed that it is more profitable to produce water yam and TDR95/19177 under no staking and trellis (50% and 30% number of optimum staking) respectively in both locations. The results suggest trellis/minimum staking can be used to minimize the use of stakes, yam mosaic virus disease infection and for sustainable yam production in the face of climate change.

ACS Style

Eric Owusu Danquah; Stella A. Ennin; Joseph N. L. Lamptey; Patricia P. Acheampong. Staking Options for Sustainable Yam Production in Ghana. Sustainable Agriculture Research 2014, 4, 1 .

AMA Style

Eric Owusu Danquah, Stella A. Ennin, Joseph N. L. Lamptey, Patricia P. Acheampong. Staking Options for Sustainable Yam Production in Ghana. Sustainable Agriculture Research. 2014; 4 (1):1.

Chicago/Turabian Style

Eric Owusu Danquah; Stella A. Ennin; Joseph N. L. Lamptey; Patricia P. Acheampong. 2014. "Staking Options for Sustainable Yam Production in Ghana." Sustainable Agriculture Research 4, no. 1: 1.