This page has only limited features, please log in for full access.

Unclaimed
Peter Ampim
Prairie View A&M University, USA

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Journal article
Published: 01 July 2021 in International Journal of Applied Geospatial Research
Reads 0
Downloads 0

This study quantified the relationships between soil, textural, and hydraulic properties at the field-scale for a conventional tilled Memphis silt loam that had undergone a 10-year corn and cotton rotation and described their spatial variability. Composite soil samples collected from the plow layer at 272 nodes on 15 x 15 m grids were analyzed for texture and bulk density. These values were used as pedotransfer functions to predict unsaturated (Ko) and saturated hydraulic (Ks) conductivities as well as the van Genuchten curve shape parameters α and n. Regression analyses quantified relationships between the measured and model predicted soil properties. While correlations between textural and model predicted soil properties including bulk density were significant (p<0.05), those between sand and clay, clay and n, clay and α were not. Sand and silt appeared to be better predictors of soil hydraulic conductivity and the van Genuchten curve shape parameters for the soil investigated. Spatial dependence was strong for sand, silt, bulk density, Ko, α and n, and moderate for clay and Ks.

ACS Style

Peter A. Y. Ampim; Alton B. Johnson; Samuel G. K. Adiku. Relationships and Spatial Structure of Soil Physical Properties in a Ten-Year Corn-Cotton Rotation Field. International Journal of Applied Geospatial Research 2021, 12, 34 -46.

AMA Style

Peter A. Y. Ampim, Alton B. Johnson, Samuel G. K. Adiku. Relationships and Spatial Structure of Soil Physical Properties in a Ten-Year Corn-Cotton Rotation Field. International Journal of Applied Geospatial Research. 2021; 12 (3):34-46.

Chicago/Turabian Style

Peter A. Y. Ampim; Alton B. Johnson; Samuel G. K. Adiku. 2021. "Relationships and Spatial Structure of Soil Physical Properties in a Ten-Year Corn-Cotton Rotation Field." International Journal of Applied Geospatial Research 12, no. 3: 34-46.

Journal article
Published: 06 May 2021 in Sustainability
Reads 0
Downloads 0

Agriculture in West Africa is constrained by several yield-limiting factors, such as poor soil fertility, erratic rainfall distributions and low input systems. Projected changes in climate, thus, pose a threat since crop production is mainly rain-fed. The impact of climate change and its variation on the productivity of cereals in smallholder settings under future production systems in Navrongo, Ghana and Nioro du Rip, Senegal was assessed in this study. Data on management practices obtained from household surveys and projected agricultural development pathways (through stakeholder engagements), soil data, weather data (historical: 1980–2009 and five General Circulation Models; mid-century time slice 2040–2069 for two Representative Concentration Pathways; 4.5 and 8.5) were used for the impact assessment, employing a crop simulation model. Ensemble maize yield changes under the sustainable agricultural development pathway (SDP) were −13 and −16%, while under the unsustainable development pathway (USDP), yield changes were −19 and −20% in Navrongo and Nioro du Rip, respectively. The impact on sorghum and millet were lower than that on maize. Variations in climate change impact among smallholders were high with relative standard deviations (RSD) of between 14% and 60% across the cereals with variability being higher under the USDP, except for millet. Agricultural production systems with higher intensification but with less emphasis on soil conservation (USDP) will be more negatively impacted by climate change compared to relatively sustainable ones (SDP).

ACS Style

Dilys MacCarthy; Myriam Adam; Bright Freduah; Benedicta Fosu-Mensah; Peter Ampim; Mouhamed Ly; Pierre Traore; Samuel Adiku. Climate Change Impact and Variability on Cereal Productivity among Smallholder Farmers under Future Production Systems in West Africa. Sustainability 2021, 13, 5191 .

AMA Style

Dilys MacCarthy, Myriam Adam, Bright Freduah, Benedicta Fosu-Mensah, Peter Ampim, Mouhamed Ly, Pierre Traore, Samuel Adiku. Climate Change Impact and Variability on Cereal Productivity among Smallholder Farmers under Future Production Systems in West Africa. Sustainability. 2021; 13 (9):5191.

Chicago/Turabian Style

Dilys MacCarthy; Myriam Adam; Bright Freduah; Benedicta Fosu-Mensah; Peter Ampim; Mouhamed Ly; Pierre Traore; Samuel Adiku. 2021. "Climate Change Impact and Variability on Cereal Productivity among Smallholder Farmers under Future Production Systems in West Africa." Sustainability 13, no. 9: 5191.

Journal article
Published: 28 April 2021 in Sustainability
Reads 0
Downloads 0

Changes in land cover (LC) can lead to environmental challenges, but few studies have investigated LC changes at a country wide scale in Ghana. Tracking LC changes at such a scale overtime is relevant for devising solutions to emerging issues. This study examined LC changes in Ghana for the past almost two and half decades covering 1995–2019 to highlight significant changes and opportunities for sustainable development. The study used land cover data for six selected years (1995, 2000, 2005, 2010, 2015, and 2019) obtained from the European Space Agency. The data was analyzed using R, ArcGIS Pro and Microsoft Excel 365 ProPlus. The original data was reclassified into eight LC categories, namely: agriculture, bare area, built-up, forest, grassland, other vegetation, waterbody, and wetland. On average, the results revealed 0.7%, 131.7%, 23.3%, 46.9%, and 11.2% increases for agriculture, built-up, forest, waterbody, and wetland, respectively, across the nation. However, losses were observed for bare area (92.8%), grassland (51.1%), and other vegetation (41%) LCs overall. Notably, agricultural land use increased up to 2015 and decreased subsequently but this did not affect production of the major staple foods. These findings reveal the importance of LC monitoring and the need for strategic efforts to address the causes of undesirable change.

ACS Style

Peter Ampim; Michael Ogbe; Eric Obeng; Edwin Akley; Dilys MacCarthy. Land Cover Changes in Ghana over the Past 24 Years. Sustainability 2021, 13, 4951 .

AMA Style

Peter Ampim, Michael Ogbe, Eric Obeng, Edwin Akley, Dilys MacCarthy. Land Cover Changes in Ghana over the Past 24 Years. Sustainability. 2021; 13 (9):4951.

Chicago/Turabian Style

Peter Ampim; Michael Ogbe; Eric Obeng; Edwin Akley; Dilys MacCarthy. 2021. "Land Cover Changes in Ghana over the Past 24 Years." Sustainability 13, no. 9: 4951.

Journal article
Published: 13 March 2021 in Energies
Reads 0
Downloads 0

Different strategies are reported in the literature for energy saving in Closed Plant Production Systems (CPPS). However, not reliable evidences about energy consumption with the use of pulsed LED light technique in lighting system available in Plant Factory and Vertical Farm. In this work, three key points to determine the effects of pulsed LED light versus continuous LED light are presented: (1) A mathematical model and its practical application for stabilizing the energy equivalence using LED light in continuous and pulsed mode in different light treatments. (2) The quantum efficiency of the photosystem II was used to determine positive and/or negative effects of the light operating mode (continuous or pulsed) on chili pepper plants (Capsicum annuum var. Serrano). (3) Evaluation of energy consumption with both operation modes using ten recipes from the literature to grow plants applied in Closed Plant Production Systems, different Photosynthetic Photon Flux Density at 50, 110, and 180 µmol m−2 s−1, Frequencies at 100, 500, and 1000 Hz, and Duty Cycles of 40, 50, 60, 70, 80, and 90%. The results show no significant statistical differences between the operation modes (continuous and pulsed LED light). For each light recipe analyzed, a pulsed frequency and a duty cycle were obtained, achieving significant energy savings in every light intensity. The results can be useful guide for real-life applications in CPPS.

ACS Style

Ernesto Olvera-Gonzalez; Nivia Escalante-Garcia; Deland Myers; Peter Ampim; Eric Obeng; Daniel Alaniz-Lumbreras; Victor Castaño. Pulsed LED-Lighting as an Alternative Energy Savings Technique for Vertical Farms and Plant Factories. Energies 2021, 14, 1603 .

AMA Style

Ernesto Olvera-Gonzalez, Nivia Escalante-Garcia, Deland Myers, Peter Ampim, Eric Obeng, Daniel Alaniz-Lumbreras, Victor Castaño. Pulsed LED-Lighting as an Alternative Energy Savings Technique for Vertical Farms and Plant Factories. Energies. 2021; 14 (6):1603.

Chicago/Turabian Style

Ernesto Olvera-Gonzalez; Nivia Escalante-Garcia; Deland Myers; Peter Ampim; Eric Obeng; Daniel Alaniz-Lumbreras; Victor Castaño. 2021. "Pulsed LED-Lighting as an Alternative Energy Savings Technique for Vertical Farms and Plant Factories." Energies 14, no. 6: 1603.