The Experts below are selected from a list of 216 Experts worldwide ranked by ideXlab platform
Ayoade Olayiwola Ogunkunle - One of the best experts on this subject based on the ideXlab platform.
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Comparison of qualitative and quantitative approaches to soil quality assessment for agricultural purposes in South-western Nigeria
Cogent Food & Agriculture, 2016Co-Authors: Olateju Dolapo Adeyolanu, Ayoade Olayiwola OgunkunleAbstract:AbstractThere has been a major challenge on how to develop soil quality standards to assess changes which are practical and useful to farmers. This study assesses soil quality using qualitative and quantitative indicators and established the relationship between the two methods of assessment. Two locations (farmer’s fields) were chosen for the study in each of three States (Oyo, Osun and Ekiti) in south-western Nigeria. In each of the farmlands, soil quality was assessed qualitatively on the field using soil health cards for visual indicators produced by natural resources conservation services of United State Department of Agriculture, and quantitatively by laboratory analysis of measured properties. The values of indicators by each of the methods of assessment were separately integrated into quantitative index using soil management assessment framework. The relationship between qualitative and quantitative methods was established using correlation analysis at α0.05.Qualitative soil quality index ranged f...
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SOIL & CROP SCIENCES | RESEARCH ARTICLE Comparison of qualitative and quantitative approaches to soil quality assessment for agricultural purposes in South-western Nigeria
2016Co-Authors: Olateju Dolapo Adeyolanu, Ayoade Olayiwola OgunkunleAbstract:2 Abstract: There has been a major challenge on how to develop soil quality standards to assess changes which are practical and useful to farmers. This study assesses soil quality using qualitative and quantitative indicators and established the relationship between the two methods of assessment. Two locations (farmer's fields) were chosen for the study in each of three States (Oyo, Osun and Ekiti) in south-western Nigeria. In each of the farmlands, soil quality was assessed qualitatively on the field using soil health cards for visual indicators produced by natural resources conservation services of United State Department of Agriculture, and quantitatively by laboratory analysis of measured properties. The values of indicators by each of the methods of assessment were separately integrated into quantitative index using soil management assessment framework. The relationship between qualitative and quantitative methods was estab- lished using correlation analysis at α 0.05 .Qualitative soil quality index ranged from 65 to 90%. Quantitatively, the indices ranged from 64 to 87%. Significant positive relation- ships (r = 0.64 to 0.93) exist between qualitative and quantitative methods. From the results, the two methods can be used interchangeably for soil quality assessment but where fund is limiting as with peasant farmers, the qualitative approach is preferable.
Olateju Dolapo Adeyolanu - One of the best experts on this subject based on the ideXlab platform.
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Comparison of qualitative and quantitative approaches to soil quality assessment for agricultural purposes in South-western Nigeria
Cogent Food & Agriculture, 2016Co-Authors: Olateju Dolapo Adeyolanu, Ayoade Olayiwola OgunkunleAbstract:AbstractThere has been a major challenge on how to develop soil quality standards to assess changes which are practical and useful to farmers. This study assesses soil quality using qualitative and quantitative indicators and established the relationship between the two methods of assessment. Two locations (farmer’s fields) were chosen for the study in each of three States (Oyo, Osun and Ekiti) in south-western Nigeria. In each of the farmlands, soil quality was assessed qualitatively on the field using soil health cards for visual indicators produced by natural resources conservation services of United State Department of Agriculture, and quantitatively by laboratory analysis of measured properties. The values of indicators by each of the methods of assessment were separately integrated into quantitative index using soil management assessment framework. The relationship between qualitative and quantitative methods was established using correlation analysis at α0.05.Qualitative soil quality index ranged f...
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SOIL & CROP SCIENCES | RESEARCH ARTICLE Comparison of qualitative and quantitative approaches to soil quality assessment for agricultural purposes in South-western Nigeria
2016Co-Authors: Olateju Dolapo Adeyolanu, Ayoade Olayiwola OgunkunleAbstract:2 Abstract: There has been a major challenge on how to develop soil quality standards to assess changes which are practical and useful to farmers. This study assesses soil quality using qualitative and quantitative indicators and established the relationship between the two methods of assessment. Two locations (farmer's fields) were chosen for the study in each of three States (Oyo, Osun and Ekiti) in south-western Nigeria. In each of the farmlands, soil quality was assessed qualitatively on the field using soil health cards for visual indicators produced by natural resources conservation services of United State Department of Agriculture, and quantitatively by laboratory analysis of measured properties. The values of indicators by each of the methods of assessment were separately integrated into quantitative index using soil management assessment framework. The relationship between qualitative and quantitative methods was estab- lished using correlation analysis at α 0.05 .Qualitative soil quality index ranged from 65 to 90%. Quantitatively, the indices ranged from 64 to 87%. Significant positive relation- ships (r = 0.64 to 0.93) exist between qualitative and quantitative methods. From the results, the two methods can be used interchangeably for soil quality assessment but where fund is limiting as with peasant farmers, the qualitative approach is preferable.
O. Eruteya - One of the best experts on this subject based on the ideXlab platform.
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Listeria spp. in Raw Cow and Goat Meat in Port Harcourt, Nigeria
British Biotechnology Journal, 2014Co-Authors: O. EruteyaAbstract:Aims: To determine the occurrence of Listeria monocytogenes and other Listeria spp. in raw cow and goat meat. Study Design: This work was based on a completely randomized design with two replication and the average values calculated for mean comparison. Place and Duration of Study: Department of Microbiology, University of Port Harcourt, Nigeria and Nigeria Institute of Medical Research, Yaba, Lagos, Nigeria. Isolation of Listeria spp. was between March 2011 and February 2012. Methodology: In this study, a total of 240 raw cow and goat meat samples were analyzed for the presence of Listeria monocytogenes and other Listeria species. The techniques recommended by the United State Department of Agriculture (USDA) revised and the Health Products and Food Methods of the Government of Canada were employed using Fraser broth and polymixin acriflavin lithium chloride ceftazidime aesculin mannitol (PALCAM) agar. Results: The results of conventional and polymerase chain reaction (PCR) characterization of the isolates revealed that 81 samples (33.75%) were positive for Listeria spp. The highest prevalence of Listeria was found in cow flesh samples (19 of 36 samples; 52.78%) followed by cow intestine samples (8 of 20; 40%) and least was goat kidney samples (5 of 28; 17.86%). Out of the 310 characterized Listeria spp., L. Original Research Article British Biotechnology Journal, 4(2): 204-214, 2014 205 monocytogenes were 4(1.29%). Other species isolated were L. innocua 20(6.45%), L. ivanovii 4(1.29%), L. seeligeri 72 (23.23%), L. welshimeri 139 (44.84%) and L. grayi 71(22.90%). No L. monocyogenes was isolated from cow samples. A higher incidence was noted during the raining season 216 (69.68%) than the dry season 94(30.32%). Conclusion: This study demonstrated the occurrence and distribution of Listeria species in retail raw cow and goat meat in Port Harcourt, Nigeria.
Ni-bin Chang - One of the best experts on this subject based on the ideXlab platform.
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Skin cancer incidence is highly associated with ultraviolet-B radiation history.
International journal of hygiene and environmental health, 2010Co-Authors: Ni-bin Chang, Rui Feng, Zhiqiang Gao, Wei GaoAbstract:Recently, the increased amount of ultraviolet-B (UV-B) exposure due to ozone depletion has been found to be associated with increased incidence of skin cancer across the world. The quantification of individual, regional, and historical UV exposure directly affects establishment of the association between skin cancer and UV exposure, but accurate assessment and measurement have been challenging for decades. As a sequence, cumulative studies using different metrics reported conflicting results on whether UV radiation, including sunburns, early childhood sun exposure, and chronic exposure, increases melanoma risk. This paper aims to establish the relationship between UV-B and melanoma incidence across the continental U.S. using an ecological approach that incorporate more accurate UV-B exposure measured by the National Aeronautical and Space Administration Nimbus-7 total ozone mapping spectrometer, and the United State Department of Agriculture ground-based network. Using statistical linear mixed models, we found strong positive associations between the skin cancer and the past UV exposure or the past cumulative 3-year UV exposure 3 or 4 years ago. UV has regional distributions and its regional effects on the skin cancer incidence are still significant after adjusting the effect of UV exposure. Research findings yield deepened understanding of spatiotemporal distribution of melanoma incidence rates and a greater appreciation for the complexity and heterogeneity of melanoma risk factors especially the UV-B exposure at different temporal and spatial scales.
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comparative analyses of the ultraviolet b flux over the continental United State based on the nasa total ozone mapping spectrometer data and usda ground based measurements
Journal of Applied Remote Sensing, 2010Co-Authors: Zhiqiang Gao, Wei Gao, Ni-bin ChangAbstract:In recent years, the risk of health effects caused by the increased exposure to Ultraviolet-B (UVB) due to stratospheric ozone depletion has received wide attention. In the US, there are two ways to accurately measure the UVB. They include: 1) the National Aeronautical and Space Administration (NASA) Nimbus-7 total ozone mapping spectrometer (TOMS), and 2) the United State Department of Agriculture (USDA) ground-based network. This paper compares these two sensors' data for the ultraviolet index (UVI) nationally and regionally to support possible public health, agricultural, and ecological analyses in the future. The major findings of our study are: 1) although there are discrepancies between these two data sets, the temporal correlation coefficients can be as high as 98%. 2) Both types of data sources depict the macroscopic spatial pattern of the UVI across the continental US.indicating a strong spatial correlation; 3) The two data sources are generally consistent though the UVI of the NASA TOMS data are often about 0.13-1.05 units larger than those of the USDA ground-based measurements; and 4) Varying differences can be seen between the Midwest and two coastal regions. While the level of the UVI on the west coast has shown a decreasing trend in the past few years, its counterpart on the east coast showed an opposite trend in between 2000 and 2005. It is hard to conclude that the changes are due to variations of total ozone concentrations in this study period. The USDA ground-based measurements may be better applied for time series analysis for public health, ecological, and agricultural applications due to their ability to provide intensive calibrated point measurements.
Wei Gao - One of the best experts on this subject based on the ideXlab platform.
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Skin cancer incidence is highly associated with ultraviolet-B radiation history.
International journal of hygiene and environmental health, 2010Co-Authors: Ni-bin Chang, Rui Feng, Zhiqiang Gao, Wei GaoAbstract:Recently, the increased amount of ultraviolet-B (UV-B) exposure due to ozone depletion has been found to be associated with increased incidence of skin cancer across the world. The quantification of individual, regional, and historical UV exposure directly affects establishment of the association between skin cancer and UV exposure, but accurate assessment and measurement have been challenging for decades. As a sequence, cumulative studies using different metrics reported conflicting results on whether UV radiation, including sunburns, early childhood sun exposure, and chronic exposure, increases melanoma risk. This paper aims to establish the relationship between UV-B and melanoma incidence across the continental U.S. using an ecological approach that incorporate more accurate UV-B exposure measured by the National Aeronautical and Space Administration Nimbus-7 total ozone mapping spectrometer, and the United State Department of Agriculture ground-based network. Using statistical linear mixed models, we found strong positive associations between the skin cancer and the past UV exposure or the past cumulative 3-year UV exposure 3 or 4 years ago. UV has regional distributions and its regional effects on the skin cancer incidence are still significant after adjusting the effect of UV exposure. Research findings yield deepened understanding of spatiotemporal distribution of melanoma incidence rates and a greater appreciation for the complexity and heterogeneity of melanoma risk factors especially the UV-B exposure at different temporal and spatial scales.
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comparative analyses of the ultraviolet b flux over the continental United State based on the nasa total ozone mapping spectrometer data and usda ground based measurements
Journal of Applied Remote Sensing, 2010Co-Authors: Zhiqiang Gao, Wei Gao, Ni-bin ChangAbstract:In recent years, the risk of health effects caused by the increased exposure to Ultraviolet-B (UVB) due to stratospheric ozone depletion has received wide attention. In the US, there are two ways to accurately measure the UVB. They include: 1) the National Aeronautical and Space Administration (NASA) Nimbus-7 total ozone mapping spectrometer (TOMS), and 2) the United State Department of Agriculture (USDA) ground-based network. This paper compares these two sensors' data for the ultraviolet index (UVI) nationally and regionally to support possible public health, agricultural, and ecological analyses in the future. The major findings of our study are: 1) although there are discrepancies between these two data sets, the temporal correlation coefficients can be as high as 98%. 2) Both types of data sources depict the macroscopic spatial pattern of the UVI across the continental US.indicating a strong spatial correlation; 3) The two data sources are generally consistent though the UVI of the NASA TOMS data are often about 0.13-1.05 units larger than those of the USDA ground-based measurements; and 4) Varying differences can be seen between the Midwest and two coastal regions. While the level of the UVI on the west coast has shown a decreasing trend in the past few years, its counterpart on the east coast showed an opposite trend in between 2000 and 2005. It is hard to conclude that the changes are due to variations of total ozone concentrations in this study period. The USDA ground-based measurements may be better applied for time series analysis for public health, ecological, and agricultural applications due to their ability to provide intensive calibrated point measurements.
