Using farmer-prioritized vertisol management options for enhanced green gram and tomato production in central Kenya

Wamari, Joab Onyango; Macharia, Jm.; Sijali, I. V.

doi:10.18697/ajfand.76.15540

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…[84] found that soil pH negatively correlated with available zinc levels. In the MIS, instances of continuous waterlogging due to inadequate drainage infrastructure have been reported, particularly in areas with black cotton soils containing high clay content [85]. Such persistent flooding prevalent in cluster MW, is commonly associated with low soil pH [86,74].…”

Section: Micronutrientsmentioning

confidence: 99%

Using Principal Component Analysis to Assess Soil Chemical Properties in the Mwea Irrigation Scheme, Kenya: Implications for Rice Agronomic Management

Menge,

Musila,

Kagito

et al. 2024

IJPSS

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Sub-Saharan Africa faces significant challenges as a net importer of rice, with self-sufficiency rates plummeting to as low as 14% in countries like Kenya. The Mwea irrigation scheme shoulders the bulk of rice cultivation, contributing over 80% of the country’s production. However, productivity within the scheme has seen a concerning decline, dropping from 5.6 ─ 6.0 t ha-1 to 1.3 ─ 4.6 t ha-1 between 1977 and 2018. This decline could be attributed to site-specific nutritional deficiencies and/or toxicities, rendering generalized agronomic recommendations ineffective in certain areas. To address this problem, our study aimed to assess soil chemical properties variability within the Mwea irrigation scheme, identify clusters with similar nutritional status, and tailor area-specific agronomic recommendations. During May to September 2020, we collected and analyzed four hundred samples from five sections of the scheme for total organic carbon, soil pH, macro and micronutrients, and exchangeable cations. Principal component analysis was conducted on the mean values of the soil chemical properties to identify significant contributors to variation and establish zones with similar patterns. Principal components 1 to 4 collectively explained 72.2% of the total variability. Cluster analysis revealed four distinct clusters, namely MW, TB, KT, and MU. Within cluster MW, soil pH was below the optimum range for rice cultivation, suggesting a need for liming. Potassium deficiency was observed across all clusters, with rice straw incorporation recommended as a long-term solution. Furthermore, zinc deficiency was noted in cluster WU, necessitating zinc fertilizer application. Conversely, iron toxicity was a concern in cluster MW, suggesting the adoption of alternating wetting and drying techniques and cultivating tolerant varieties. By proving tailored recommendations based on localized soil conditions, we aim to bolster rice productivity within the Mwea irrigation scheme and contribute to regional food security efforts.

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Section: Micronutrientsmentioning

confidence: 99%

Using Principal Component Analysis to Assess Soil Chemical Properties in the Mwea Irrigation Scheme, Kenya: Implications for Rice Agronomic Management

Menge,

Musila,

Kagito

et al. 2024

IJPSS

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Multi-variate Analysis of the Soil Chemical Properties in the Mwea Irrigation Scheme, Kenya and its Implications on Agronomic Management

Menge,

Musila,

Kagito

et al. 2023

Preprint

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Sub-Saharan Africa is a net importer of rice with self-sufficiency rates of as low as 14% in countries such as Kenya. More 80% of the rice produced in the country is cultivated in the Mwea irrigation scheme. Productivity in the irrigation scheme declined from 5.6 ─ 6.0 t ha− 1 to 1.3 ─ 4.6 t ha− 1 between 1977 and 2018 that could be attributed to site specific nutritional deficiencies and /or toxicities rendering the generalized agronomic recommendations inapplicable in some areas. This study aimed to evaluate variability in soil chemical properties within the irrigation scheme, cluster areas with similar nutritional status and provide area-specific agronomic recommendations. Four hundred samples were collected from the five sections of the Mwea irrigation scheme and analyzed for total organic carbon, soil pH, macro nutrients, micro nutrients and exchangeable cations. Principal components (PC) 1 ─ 4 accounted for 72.2% of the total variability within the irrigation scheme. Four clusters were generated in a scatter plot between PC1 and 2 and there were significant differences among the clusters for all the elements evaluated except for Na. Soil pH, potassium and zinc levels were found to be below optimum while available phosphorus and iron were above the critical levels leading to deficiencies and /or toxicities. Based on the findings of cluster analysis and variability of each nutrient among the clusters, specific management strategies were suggested to guide in developing of a package of good agronomic practices to improve rice productivity in the irrigation scheme.

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A systematic scoping review of the impacts of community food production initiatives in Kenya, Cameroon, and South Africa

Hutton

Brugulat-Panés

Bhagtani

et al. 2021

Journal of Global Health Reports

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Background Even before the COVID-19 pandemic, one in two people in Africa were food insecure. The burden of malnutrition remains high (e.g. childhood stunting, anaemia in women of reproductive age) or are increasing (e.g. overweight and obesity). A range of coordinated actions are required to improve this situation, including increasing local food production and consumption. The aim of this review was to provide a systematic and comprehensive overview of recently published research into the health, social, economic, and environmental impacts of community food production initiatives (CFPIs) in Kenya, Cameroon and South Africa. Methods We searched eight electronic databases covering health, social, environmental, economic and agricultural sciences. Primary research studies published from 1 January 2014 to 31 December 2018 were considered. Data on geographic location, study design, type of CFPI and the impacts assessed were abstracted from eligible articles. Findings We identified 4828 articles, 260 of which required full-text review and 118 met our eligibility criteria. Most research was conducted in Kenya (53.4%) and South Africa (38.1%). The categories of CFPIs studied were (in order of decreasing frequency): crop farming, livestock farming, unspecified farming, fisheries, home / school gardens, urban agriculture, and agroforestry. The largest number of studies were on the economic and environmental impacts of CFPIs, followed by their health and social impacts. The health impacts investigated included food security, nutrition status and dietary intake. One study investigated the potential impact of CFPIs on non-communicable diseases. Over 60% of studies investigated a single category of impact. Not one of the studies explicitly used a theoretical framework to guide its design or interpretation. Conclusions Our findings on research studies of CFPIs suggest the need for a greater focus on interdisciplinary research in order to improve understanding of the relationships between their health, environmental, economic, and social impacts. Greater use of explicit theoretical frameworks could assist in research design and interpretation, helping to ensure its relevance to informing coordinated intersectoral interventions and policy initiatives. Diet, nutrition and food insecurity in Sub-Saharan Africa remain major public health concerns, with its people being some of the most nutritionally insecure in the world. 1 Factors compounding the risk of malnutrition and poor health are conflict, climate variability, poor infrastructure, and a dietary transition towards processed and ultra-processed foods that are energy dense as well as high in refined sugars, saturated fats, and salt. 2 This shift in dietary patterns, to

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Using farmer-prioritized vertisol management options for enhanced green gram and tomato production in central Kenya

Cited by 3 publications

References 4 publications

Using Principal Component Analysis to Assess Soil Chemical Properties in the Mwea Irrigation Scheme, Kenya: Implications for Rice Agronomic Management

Using Principal Component Analysis to Assess Soil Chemical Properties in the Mwea Irrigation Scheme, Kenya: Implications for Rice Agronomic Management

Multi-variate Analysis of the Soil Chemical Properties in the Mwea Irrigation Scheme, Kenya and its Implications on Agronomic Management

A systematic scoping review of the impacts of community food production initiatives in Kenya, Cameroon, and South Africa

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