Alpha Y. Kamara
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View article: Agronomic and Intercropping Performance of Newly Developed Elite Cowpea Lines for the West African Savannas
Agronomic and Intercropping Performance of Newly Developed Elite Cowpea Lines for the West African Savannas Open
Cowpea production in Nigeria, the world’s largest producer, is insufficient to meet domestic demand due to significant yield gaps caused by various production constraints. Several high-yielding improved cowpea varieties have been developed…
View article: On-farm adoption and impacts of climate-smart agricultural practices on food security of smallholder farmers in Mali
On-farm adoption and impacts of climate-smart agricultural practices on food security of smallholder farmers in Mali Open
Climate-smart agriculture (CSA) has become a popular approach to build farmers’ adaptation capabilities to climate change effects in Sub-Saharan Africa. In Mali, a number of CSA practices have been promoted among smallholder farmers, but t…
View article: Fertilizer Use Efficiency and Profitability of Maize Varieties with Different Maturity Classes in Semi-Arid Ghana
Fertilizer Use Efficiency and Profitability of Maize Varieties with Different Maturity Classes in Semi-Arid Ghana Open
Optimizing the efficiency of fertilizer use is critical for sustainable maize production and food security, particularly in smallholder systems. Sub-optimal application rates pose a significant risk of soil nutrient depletion and low produ…
View article: Understanding cowpea yield: A comprehensive analysis of physiological traits' contribution through path analysis
Understanding cowpea yield: A comprehensive analysis of physiological traits' contribution through path analysis Open
This study investigates the physiological processes affecting the grain yield of cowpea (Vigna unguiculata), a key protein, vitamin, and mineral source in human diets. Gaining an understanding of these mechanisms can be crucial for develop…
View article: Modelling the potential impact of climate change on the productivity of soybean in the Nigeria Savannas
Modelling the potential impact of climate change on the productivity of soybean in the Nigeria Savannas Open
A well-calibrated and evaluated GROPGRO module of the Decision Support System for Agro-technological Transfer (DSSAT) was used to simulate productivity of soybean in northern Nigeria under climate change. Both historical (1990–2019) and pr…
View article: Analysis of Farmers’ Indigenous Knowledge, Perceptions, and Practices Used in the Control of Parasitic Weed Striga among Maize and Sorghum Farmers in Northern Nigeria
Analysis of Farmers’ Indigenous Knowledge, Perceptions, and Practices Used in the Control of Parasitic Weed Striga among Maize and Sorghum Farmers in Northern Nigeria Open
This study examined the socio-economic impact of the parasitic weed Striga infestation and the effectiveness of local and conventional control measures in Nigeria’s Gombe, Kano, and Jigawa States. Cross-sectional data from 925 respondents …
View article: The Impact of Planting Dates on the Performance of Soybean Varieties [Glycine max (L.) Merr.] in the Nigerian Savannas
The Impact of Planting Dates on the Performance of Soybean Varieties [Glycine max (L.) Merr.] in the Nigerian Savannas Open
Increasing delays in the onset of the rainy season and extended dry spells in the Nigerian savannas are complicating the determination of optimal planting dates for rain-fed crops, which increases risks for farmers. This study evaluated th…
View article: Molecular Identification of stink bug (Pentatomidae sp. BD39) and pod sucking bug (Mirperus sp.) associated with crops under rotation
Molecular Identification of stink bug (Pentatomidae sp. BD39) and pod sucking bug (Mirperus sp.) associated with crops under rotation Open
One of the problems facing agricultural production in Nigeria is the pests and diseases, which farmers depend heavily on the use of chemicals for their control. However, in time of outbreak of invasive species, difficulties amount on the p…
View article: Assessing the effects of plant density and nitrogen on millet yield in Southern Niger using the CERES-millet model
Assessing the effects of plant density and nitrogen on millet yield in Southern Niger using the CERES-millet model Open
Background The dryland production environments in Niger Republic (Niger) generate variable crop production risks that reduce crop yields and increase regional food insecurity. Optimal combinations of crop varieties and management are neede…
View article: Effect of combined use of supplementary irrigation, manure and P fertilization on grain yield and profitability of soybean in northern Nigeria
Effect of combined use of supplementary irrigation, manure and P fertilization on grain yield and profitability of soybean in northern Nigeria Open
Declining soil fertility particularly phosphorus deficiency, low organic carbon, moisture stress and high cost of input are factors limiting soybean yield in the Nigeria savanna. Supplementary irrigation, nutrient application and inoculati…
View article: Combined use of improved maize hybrids and nitrogen application increases grain yield of maize, under natural <i>Striga hermonthica</i> infestation
Combined use of improved maize hybrids and nitrogen application increases grain yield of maize, under natural <i>Striga hermonthica</i> infestation Open
Striga hermonthica (Del.) Benth infestation is one of the major constraints to maize production in the Nigeria savannas. The application of nitrogen fertilizer to Striga -resistant hybrids may reduce Striga infection and increase grain yie…
View article: Implication of blanket NPK application on nutrient balance of maize based on soil and tissue diagnosis approaches in the savannas of northern Nigeria
Implication of blanket NPK application on nutrient balance of maize based on soil and tissue diagnosis approaches in the savannas of northern Nigeria Open
Improper nutrient management reduces the yield and affects the nutrient status of crops. This study aimed to diagnose the nutrients limitation in maize. A three-year multi-location (348 sites) nutrient experiments were conducted in randomi…
View article: Breeding Cowpea for Adaptation to Intercropping for Sustainable Intensification in the Guinea Savannas of Nigeria
Breeding Cowpea for Adaptation to Intercropping for Sustainable Intensification in the Guinea Savannas of Nigeria Open
Cowpea is a multifaceted crop; however, considerable challenges affect the production of this crop despite its comparatively better adaptation to harsh environments. Most smallholder farmers in West Africa cultivate this crop in intercropp…
View article: Evaluating the use of nitrogen and phosphorous fertilization as crop management options for maize adaptation to climate change in the Nigeria savannas
Evaluating the use of nitrogen and phosphorous fertilization as crop management options for maize adaptation to climate change in the Nigeria savannas Open
Poor soil fertility and climate variability are major constraints to maize production in the Nigeria savannas. The application of nitrogen (N) and phosphorus (P) as adaptation strategy may enhance maize yield under climate change. In this …
View article: Establishing Optimal Planting Windows for Contrasting Sorghum Cultivars across Diverse Agro-Ecologies of North-Eastern Nigeria: A Modelling Approach
Establishing Optimal Planting Windows for Contrasting Sorghum Cultivars across Diverse Agro-Ecologies of North-Eastern Nigeria: A Modelling Approach Open
In the context of climate change, the sowing date and cultivar choice can influence the productivity of sorghum, especially where production is constrained by low soil fertility and early terminal drought across the challenging agro-ecolog…
View article: Spatial modelling indicates <i>Striga</i> seedbank density dependence on rainfall and soil traits in the savannas of northern Nigeria
Spatial modelling indicates <i>Striga</i> seedbank density dependence on rainfall and soil traits in the savannas of northern Nigeria Open
Striga is one of most notorious weeds devastating crop production in the dry savannas of northern Nigeria. The weed attacks most cultivated cereals and legumes with crop losses as high as 100% when no control measure is employed. Studies c…
View article: Simulating potential yield of rainfed soybean in northeast Nigeria
Simulating potential yield of rainfed soybean in northeast Nigeria Open
We used the CROPGRO-Soybean model to simulate the production potential of rainfed soybean in northeast Nigeria. Data from ten soybean experiments conducted under optimal conditions in 2016-2018 at Kano and Dambatta in the Sudan savanna (SS…
View article: Compositional nutrient diagnosis and associated yield predictions in maize: A case study in the northern Guinea savanna of Nigeria
Compositional nutrient diagnosis and associated yield predictions in maize: A case study in the northern Guinea savanna of Nigeria Open
Developing optimal strategies for nutrient management of soils and crops at a larger scale requires an understanding of nutrient limitations and imbalances. The availability of extensive data ( n = 1,781) from 2‐yr nutrient omission trials…
View article: Identification of soil properties influencing DRIS indices of maize in the savannas of northern Nigeria
Identification of soil properties influencing DRIS indices of maize in the savannas of northern Nigeria Open
AimsImproper nutrient management reduces yield and affects the nutrient status of crops. This study aimed at diagnosing nutrient limitation in maize.MethodsA three-year multi-location (348 sites) nutrient experiments were conducted in rand…
View article: Assessing the Spatial Variability of Soil Properties to Delineate Nutrient Management Zones in Smallholder Maize-Based System of Nigeria
Assessing the Spatial Variability of Soil Properties to Delineate Nutrient Management Zones in Smallholder Maize-Based System of Nigeria Open
Spatially explicit information on soil variability is relevant for agronomic decisions; however, such information is limited in the northern Guinea savanna (NGS) agroecological zone of Nigeria. This study was conducted to delineate soil nu…
View article: Evaluation and application of the CROPGRO-soybean model for determining optimum sowing windows of soybean in the Nigeria savannas
Evaluation and application of the CROPGRO-soybean model for determining optimum sowing windows of soybean in the Nigeria savannas Open
Soybean production is limited by poor soil fertility and unstable rainfall due to climate variability in the Nigeria savannas. There is a decline in the amount and duration of rainfall as one moves from the south to north of the savanna zo…
View article: Optimum Stand Density of Tropical Maize Varieties: An On-farm Evaluation of Grain Yield Responses in the Nigerian Savanna
Optimum Stand Density of Tropical Maize Varieties: An On-farm Evaluation of Grain Yield Responses in the Nigerian Savanna Open
Selection of appropriate sowing density is an important yield enhancing management decision in maize ( Zea mays L.) production particularly in rainfed conditions. This study aimed at evaluating the optimum stand densities (OSDs) of 10 rece…
View article: Maize nutrient yield response and requirement in the maize belt of Nigeria
Maize nutrient yield response and requirement in the maize belt of Nigeria Open
Absence of site-specific nutrient recommendation and high spatial variability of soil fertility are major factors affecting maize response to applied nutrients in Nigeria. In this study, we assessed maize response to applied nutrients and …