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Improvement in physical quality of a Sahelian Arenosol and implications on millet yield

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Abstract
Poor soil fertility remains a threat to crop production and livelihoods in the Sahel. Understanding the impacts of proposed soil fertility management technologies on soil fertility status and millet yield is essential. We conducted a 2-year experiment to assess changes in selected physical properties of an Arenosol and their impacts on millet yields at Karabedji, Niger. Treatments consisted of four fertilizer rates applied on top and bottom farm types selected from a long-term experiment. Mixed-model analyses indicated considerable effects (P=0.055) of fertilizer rates and farm types on soil structural stability being higher in the top farm than in the bottom farm type. Dexter's soil physical quality index (S) varied significantly with soil depth. A significant correlation (R-2=0.24) was found between the aggregate stability index and S. Plant available water recorded in fertilizer-treated soil was higher than the control and higher on the top farm than in the bottom farm. Fertilizer rates and farm types influenced millet yields. Moreover, we obtained positive relationships between millet yield and soil aggregate stability, and plant available water, thereby elucidating the significant role played by soil physical properties in influencing crop yields. S can be a simple way for assessing the physical quality of Sahelian sandy soil.
Keywords
mixed model analysis, SOIL FERTILITY MANAGEMENT, Psammentic Paleustalfs, soil structural stability index, semi-arid Africa, Soil physical quality, SMALLHOLDER FARMS, WEST-AFRICA, EXPLORING DIVERSITY, ORGANIC-MATTER, PRODUCTIVITY, STRATEGIES, ALLOCATION, TILLAGE, KENYA

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Chicago
Garba, Maman, Vincent Logah, Jasmien Wildemeersch, Sabiou Mahaman, Guéro Yadji, Charles Quansah, Mensah Bonsu, Wim Cornelis, and Robert C Abaidoo. 2016. “Improvement in Physical Quality of a Sahelian Arenosol and Implications on Millet Yield.” Archives of Agronomy and Soil Science 62 (7): 947–962.
APA
Garba, Maman, Logah, V., Wildemeersch, J., Mahaman, S., Yadji, G., Quansah, C., Bonsu, M., et al. (2016). Improvement in physical quality of a Sahelian Arenosol and implications on millet yield. ARCHIVES OF AGRONOMY AND SOIL SCIENCE, 62(7), 947–962.
Vancouver
1.
Garba M, Logah V, Wildemeersch J, Mahaman S, Yadji G, Quansah C, et al. Improvement in physical quality of a Sahelian Arenosol and implications on millet yield. ARCHIVES OF AGRONOMY AND SOIL SCIENCE. 2016;62(7):947–62.
MLA
Garba, Maman, Vincent Logah, Jasmien Wildemeersch, et al. “Improvement in Physical Quality of a Sahelian Arenosol and Implications on Millet Yield.” ARCHIVES OF AGRONOMY AND SOIL SCIENCE 62.7 (2016): 947–962. Print.
@article{7001424,
  abstract     = {Poor soil fertility remains a threat to crop production and livelihoods in the Sahel. Understanding the impacts of proposed soil fertility management technologies on soil fertility status and millet yield is essential. We conducted a 2-year experiment to assess changes in selected physical properties of an Arenosol and their impacts on millet yields at Karabedji, Niger. Treatments consisted of four fertilizer rates applied on top and bottom farm types selected from a long-term experiment. Mixed-model analyses indicated considerable effects (P=0.055) of fertilizer rates and farm types on soil structural stability being higher in the top farm than in the bottom farm type. Dexter's soil physical quality index (S) varied significantly with soil depth. A significant correlation (R-2=0.24) was found between the aggregate stability index and S. Plant available water recorded in fertilizer-treated soil was higher than the control and higher on the top farm than in the bottom farm. Fertilizer rates and farm types influenced millet yields. Moreover, we obtained positive relationships between millet yield and soil aggregate stability, and plant available water, thereby elucidating the significant role played by soil physical properties in influencing crop yields. S can be a simple way for assessing the physical quality of Sahelian sandy soil.},
  author       = {Garba, Maman and Logah, Vincent and Wildemeersch, Jasmien and Mahaman, Sabiou and Yadji, Gu{\'e}ro and Quansah, Charles and Bonsu, Mensah and Cornelis, Wim and Abaidoo, Robert C},
  issn         = {0365-0340},
  journal      = {ARCHIVES OF AGRONOMY AND SOIL SCIENCE},
  keyword      = {mixed model analysis,SOIL FERTILITY MANAGEMENT,Psammentic Paleustalfs,soil structural stability index,semi-arid Africa,Soil physical quality,SMALLHOLDER FARMS,WEST-AFRICA,EXPLORING DIVERSITY,ORGANIC-MATTER,PRODUCTIVITY,STRATEGIES,ALLOCATION,TILLAGE,KENYA},
  language     = {eng},
  number       = {7},
  pages        = {947--962},
  title        = {Improvement in physical quality of a Sahelian Arenosol and implications on millet yield},
  url          = {http://dx.doi.org/10.1080/03650340.2015.1104414},
  volume       = {62},
  year         = {2016},
}

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