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21 results on '"Nalivata P"'

4. Cereal grain mineral micronutrient and soil chemistry data from GeoNutrition surveys in Ethiopia and Malawi

Author

Kumssa, D. B., Mossa, A. W., Amede, T., Ander, E. L., Bailey, E. H., Botoman, L., Chagumaira, C., Chimungu, J. G., Davis, K., Gameda, S., Haefele, S. M., Hailu, K., Joy, E. J. M., Lark, R. M., Ligowe, I. S., McGrath, S. P., Milne, A., Muleya, P., Munthali, M., Towett, E., Walsh, M. G., Wilson, L., Young, S. D., Haji, I. R., Broadley, M. R., Gashu, D., and Nalivata, P. C.

Published
2022
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5. The nutritional quality of cereals varies geospatially in Ethiopia and Malawi

Author

Gashu, D., Nalivata, P. C., Amede, T., Ander, E. L., Bailey, E. H., Botoman, L., Chagumaira, C., Gameda, S., Haefele, S. M., Hailu, K., Joy, E. J. M., Kalimbira, A. A., Kumssa, D. B., Lark, R. M., Ligowe, I. S., McGrath, S. P., Milne, A. E., Mossa, A. W., Munthali, M., Towett, E. K., Walsh, M. G., Wilson, L., Young, S. D., and Broadley, M. R.

Published
2021
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8. Preparing for a community-based agriculture-to-nutrition trial in rural Malawi: formative research to assess feasibility and inform design and implementation decisions

Author

Chiutsi-Phiri, Gabriella, Kalimbira, Alexander A., Banda, Leonard, Nalivata, Patson C., Sanuka, Marion, Kalumikiza, Zione, Matandika, Limbanazo, Mfutso-Bengo, Joseph, Allen, Elizabeth, Ferguson, Elaine, Sturgess, Joanna, Broadley, Martin R., Langley-Evans, Simon, Millar, Kate, Gashu, Dawd, and Joy, Edward J. M.

Published
2021
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11. Can selenium deficiency in Malawi be alleviated through consumption of agro-biofortified maize flour? Study protocol for a randomised, double-blind, controlled trial

Author

Joy, Edward J. M., Kalimbira, Alexander A., Gashu, Dawd, Ferguson, Elaine L., Sturgess, Joanna, Dangour, Alan D., Banda, Leonard, Chiutsi-Phiri, Gabriella, Bailey, Elizabeth H., Langley-Evans, Simon C., Lark, R. Murray, Millar, Kate, Young, Scott D., Matandika, Limbanazo, Mfutso-Bengo, Joseph, Phuka, John C., Phiri, Felix P., Gondwe, Jellita, Ander, E. Louise, Lowe, Nicola M., Nalivata, Patson C., Broadley, Martin R., and Allen, Elizabeth

Published
2019
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12. Maize-nutrient response information applied across Sub-Saharan Africa

Author

Wortmann, Charles S., Milner, Maribeth, Kaizzi, Kayuki C., Nouri, Maman, Cyamweshi, Athanase R., Dicko, Mohammed K., Kibunja, Catherine N., Macharia, Martin, Maria, Ricardo, Nalivata, Patson C., Demissie, Negash, Nkonde, Davy, Ouattara, Korodjouma, Senkoro, Catherine J., Tarfa, Bitrus Dawi, and Tetteh, Francis M.

Published
2017
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13. Cereal grain mineral micronutrient and soil chemistry data from GeoNutrition surveys in Ethiopia and Malawi

Author

Kumssa, D.B., Mossa, A.W., Amede, T., Ander, E.L., Bailey, E. H., Botoman, L., Chagumaira, C., Chimungu, J. G., Davis, K., Gameda, S., Haefele, S. M., Hailu, K., Joy, E. J. M., Lark, R. M., Ligowe, I. S., McGrath, S. P., Milne, A., Muleya, P., Munthali, M., Towett, E., Walsh, M. G., Wilson, L., Young, S. D., Haji, I. R., Broadley, M. R., Gashu, D., Nalivata, P. C., Kumssa, D.B., Mossa, A.W., Amede, T., Ander, E.L., Bailey, E. H., Botoman, L., Chagumaira, C., Chimungu, J. G., Davis, K., Gameda, S., Haefele, S. M., Hailu, K., Joy, E. J. M., Lark, R. M., Ligowe, I. S., McGrath, S. P., Milne, A., Muleya, P., Munthali, M., Towett, E., Walsh, M. G., Wilson, L., Young, S. D., Haji, I. R., Broadley, M. R., Gashu, D., and Nalivata, P. C.

Abstract

The dataset comprises primary data for the concentration of 29 mineral micronutrients in cereal grains and up to 84 soil chemistry properties from GeoNutrition project surveys in Ethiopia and Malawi. The work provided insights on geospatial variation in the micronutrient concentration in staple crops, and the potential influencing soil factors. In Ethiopia, sampling was conducted in Amhara, Oromia, and Tigray regions, during the late-2017 and late-2018 harvest seasons. In Malawi, national-scale sampling was conducted during the April–June 2018 harvest season. The concentrations of micronutrients in grain were measured using inductively coupled plasma mass spectrometry (ICP-MS). Soil chemistry properties reported include soil pH; total soil nitrogen; total soil carbon (C); soil organic C; effective cation exchange capacity and exchangeable cations; a three-step sequential extraction scheme for the fractionation of sulfur and selenium; available phosphate; diethylenetriaminepentaacetic acid (DTPA)-extractable trace elements; extractable trace elements using 0.01 M Ca(NO3)2 and 0.01 M CaCl2; and isotopically exchangeable Zn. These data are reported here according to FAIR data principles to enable users to further explore agriculture-nutrition linkages.

Published
2022

14. Soil and landscape factors influence geospatial variation in maize grain zinc concentration in Malawi

Author

Botoman, L., Chagumaira, C., Mossa, A. W., Amede, T., Ander, E. L., Bailey, E. H., Chimungu, J. G., Gameda, S., Gashu, D., Haefele, S. M., Joy, E. J. M., Kumssa, D. B., Ligowe, I. S., McGrath, S. P., Milne, A. E., Munthali, M., Towett, E., Walsh, M. G., Wilson, L., Young, S. D., Broadley, M. R., Lark, R. M., and Nalivata, P. C.

Subjects
Malawi, Minerals, Soil, Zinc, Multidisciplinary, Humans, Pentetic Acid, Edible Grain, Zea mays
Abstract

Dietary zinc (Zn) deficiency is widespread globally, and in particular among people in sub-Saharan Africa (SSA). In Malawi, dietary sources of Zn are dominated by maize and spatially dependent variation in grain Zn concentration, which will affect dietary Zn intake, has been reported at distances of up to ~ 100 km. The aim of this study was to identify potential soil properties and environmental covariates which might explain this longer-range spatial variation in maize grain Zn concentration. Data for maize grain Zn concentrations, soil properties, and environmental covariates were obtained from a spatially representative survey in Malawi (n = 1600 locations). Labile and non-labile soil Zn forms were determined using isotopic dilution methods, alongside conventional agronomic soil analyses. Soil properties and environmental covariates as potential predictors of the concentration of Zn in maize grain were tested using a priori expert rankings and false discovery rate (FDR) controls within the linear mixed model (LMM) framework that informed the original survey design. Mean and median grain Zn concentrations were 21.8 and 21.5 mg kg−1, respectively (standard deviation 4.5; range 10.0–48.1). A LMM for grain Zn concentration was constructed for which the independent variables: soil pH(water), isotopically exchangeable Zn (ZnE), and diethylenetriaminepentaacetic acid (DTPA) extractable Zn (ZnDTPA) had predictive value (p

Published
2021

17. Selenium deficiency risks in sub-Saharan African food systems and their geospatial linkages

Author

Ligowe, I. S., primary, Phiri, F. P., additional, Ander, E. L., additional, Bailey, E. H., additional, Chilimba, A. D. C., additional, Gashu, D., additional, Joy, E. J. M., additional, Lark, R. M., additional, Kabambe, V., additional, Kalimbira, A. A., additional, Kumssa, D. B., additional, Nalivata, P. C., additional, Young, S. D., additional, and Broadley, M. R., additional

Published
2020
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18. Selenium deficiency risks in sub-Saharan African food systems and their geospatial linkages

Author

Ligowe, I. S., Phiri, F. P., Ander, E.L., Bailey, E. H., Chilimba, A. D. C., Gashu, D., Joy, E. J. M., Lark, R. M., Kabambe, V., Kalimbira, A. A., Kumssa, D. B., Nalivata, P. C., Young, S. D., Broadley, M. R., Ligowe, I. S., Phiri, F. P., Ander, E.L., Bailey, E. H., Chilimba, A. D. C., Gashu, D., Joy, E. J. M., Lark, R. M., Kabambe, V., Kalimbira, A. A., Kumssa, D. B., Nalivata, P. C., Young, S. D., and Broadley, M. R.

Abstract

Selenium (Se) is an essential element for human health. However, our knowledge of the prevalence of Se deficiency is less than for other micronutrients of public health concern such as iodine, iron and zinc, especially in sub-Saharan Africa (SSA). Studies of food systems in SSA, in particular in Malawi, have revealed that human Se deficiency risks are widespread and influenced strongly by geography. Direct evidence of Se deficiency risks includes nationally representative data of Se concentrations in blood plasma and urine as population biomarkers of Se status. Long-range geospatial variation in Se deficiency risks has been linked to soil characteristics and their effects on the Se concentration of food crops. Selenium deficiency risks are also linked to socio-economic status including access to animal source foods. This review highlights the need for geospatially-resolved data on the movement of Se and other micronutrients in food systems which span agriculture–nutrition–health disciplinary domains (defined as a GeoNutrition approach). Given that similar drivers of deficiency risks for Se, and other micronutrients, are likely to occur in other countries in SSA and elsewhere, micronutrient surveillance programmes should be designed accordingly.

Published
2020

19. Doctoral training to support sustainable soil geochemistry research in Africa

Author

Manzeke-Kangara, M. G., Ligowe, I. S., Kaninga, B., Nalivata, P., Kabambe, V., Mbewe, E., Chishala, B. H., Sakala, G. M., Mapfumo, P., Mtambanengwe, F., Tendayi, T., Murwira, A., Chilimba, A. D. C., Phiri, F. P., Ander, E. L., Bailey, E. H., Lark, R. M., Millar, K., Watts, M. J., Young, S. D., and Broadley, M. R.

Abstract

Africa’s potential for scientific research is not yet being realized, for various reasons including a lack of researchers in many fields and insufficient funding. Strengthened research capacity through doctoral training programmes in higher education institutes (HEIs) in Africa, to include collaboration with national, regional and international research institutions, can facilitate self-reliant and sustainable research to support socio-economic development. In 2012, the Royal Society and the UK’s Department for International Development (now the Foreign, Commonwealth and Development Office) launched the Africa Capacity Building Initiative (ACBI) Doctoral Training Network which aimed to strengthen research capacity and training across sub-Saharan Africa. The ACBI supported 30 core PhD scholarships, all registered/supervised within African HEIs with advisory support from the UK-based institutes. Our ‘Soil geochemistry to inform agriculture and health policies’ consortium project, which was part of the ACBI doctoral training programme network, was implemented in Malawi, Zambia and Zimbabwe between 2014 and 2020. The aims of our consortium were to explore linkages between soil geochemistry, agriculture and public health for increased crop productivity, nutrition and safety of food systems and support wider training and research activities in soil science. Highlights from our consortium included: (i) the generation of new scientific evidence on linkages between soils, crops and human nutrition; (ii) securing new projects to translate science into policy and practice; and (iii) maintaining sustainable collaborative learning across the consortium. Our consortium delivered high-quality science outputs and secured new research and doctoral training funding from a variety of sources to ensure the continuation of research and training activities. For example, follow-on Global Challenges Research Funded Translation Award provided a strong evidence base on the prevalence of deficiencies in children under 5 years of age and women of reproductive age in Zimbabwe. This new evidence will contribute towards the design and implementation of a nationally representative micronutrient survey as an integral part of the Zimbabwe Demographic and Health Surveys conducted by the Ministry of Health and Child Care. The award also generated new evidence and a road map for creating quality innovative doctorates through a doctoral training landscape activity led by the Zimbabwe Council for Higher Education. Although our project and the wider ACBI has contributed to increasing the self-reliance and sustainability of research within the region, many challenges remain and ongoing investment is required.

Published
2024
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20. Maize-Nutrient Response Functions for Eastern and Southern Africa.

Author

Wortmann, Charles S., Senkoro, Catherine, Cyamweshi, Athanase R., Kibunja, Catherine, Nkonde, Davy, Munthali, Moses, Nalivata, Patson, Nabahungu, Léon N., and Kaizzi, Kayuki

Abstract

Information is scarce for maize (Zea mays L.) response to nutrient application for many production areas in tropical Africa. Research was conducted to determine macronutrient response functions and to diagnose Mg-S-Zn-B deficiencies. Site-year × N-rate interactions within countries often accounted for little variation in yield relative to the N-rate effect. Country mean grain yield responses to N-rate were curvilinear to plateau, but linear in Malawi. Although mean yields differed, the response to N was similar for Kenya, Tanzania, and Zambia with a mean yield increase of 0.94 Mg ha-1 due to 50 kg ha-1 N compared with 1.59 Mg ha-1 for Malawi and Rwanda. Response to N was related to yield with no fertilizer applied (r = 0.40). Only Rwanda had mean responses to P and K with respective yield increases of 0.99 and 0.22 Mg ha-1 due to 15 kg ha-1. Application of Mg-S-Zn-B caused a mean yield increase of 0.73 Mg ha-1 in Rwanda but had no effect in other countries. Application of affordable fertilizer to twice as much land at 50% compared with 100% of the economically optimum rate results in mean gains of 50% for production and agronomic efficiency and 72% for profit/cost ratio. Soil test results were not related to response to applied nutrients but historical yield appears to be weakly predictive of N response. The determined country-level P and K response functions can be widely applied, except for Kenya, in consideration of other available information. The response to Mg-S-Zn-B in Rwanda needs further investigation. [ABSTRACT FROM AUTHOR]

Published
2018
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21. Prevalence of Plastic and Hardware Foreign Bodies among Goats at Malawi Markets.

Author

Airs PM, Tinsley JHI, Mvula W, Ventura-Cordero J, Takahashi T, Nalivata P, van Wyk JA, Morgan ER, and Safalaoh ACL

Abstract

Smallholder goat production plays a major role in rural livelihoods and food security in Malawi, but suffers from drastic and unpredictable production losses. While goat production is closely linked to small-scale local markets for slaughter and butchering, the perspectives of butchers and their potential as a source of animal health information are largely untapped. Butchers can provide insights into goat health status at slaughter as well as issues that go unseen before slaughter, such as the presence of indigestible foreign bodies (IFBs). IFBs include solid materials such as plastics and hardware (metals, stones, and other hard objects) that cause foreign body syndrome and can lead to impaction, oedema, malnutrition, and death. To estimate the presence of IFBs, 150 market stand butchers were surveyed across five districts in Malawi, focusing on a distinction between hardware and single-use plastics, which are still widely present in Malawi despite bans on production. Most butchers found plastic IFBs (80.7%), with over half (56.7%) reporting plastic IFBs recently among the past five slaughters. Hardware IFBs were less common, reported by 45.3% of butchers. While some butchers commented on the impact of IFBs on meat quality metrics ex-post, the majority observed no differences. While butchers unanimously considered health to be an important characteristic when sourcing goats, 70.7% consider injury status to be less important or not important. Overall, this study highlights the issue of anthropogenic waste pollution on goat production in Malawi and demonstrates the potential for the surveillance of goat health at market.

Published
2024
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