Browsing by Author "Amuri, Nyambilila A"

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Climate Impacts on Agricultural and Natural Resource Sustainability in Africa
(Springer) Singh, Bal Ram; Safalaoh, Andy; Amuri, Nyambilila A; Eik, Lars Olav; Sitaula, Bishal K; Lal, Rattan
Climate Impacts on Agricultural and Natural Resource Sustainability in Africa
(Springer, 2020) Singh, Bal Ram; Safalaoh, Andy; Amuri, Nyambilila A; Eik, Lars Olav; Sitaula, Bishal K; Lal, Rattan
The major challenge related to sustainable management of natural resources, agricultural and livestock production, and the assessment of innovative technologies and policies is to identify solutions for these problems. Soil degradation, a serious problem in sub-Saharan Africa, is affected by climate change through emission of greenhouse gases (GHGs). Thus, restoration and sustainable management of soil to minimize risks of soil degradation are important to adaptation and mitigation of climate change and to advancing sustainable development goals of the United Nations. Livestock is a source of animal proteins for humans on the one hand and a source of nutrients and energy (biogas) on the other. However, livestock is vulnerable to many climate change-induced disasters such as prolonged droughts and floods, resulting in loss of animals and feed resources. In order to fully benefit from livestock, the targeted interventions needed include adoption of feed preservation technologies, including hay and silage for use during lean periods, controlled planning and management of com- munal grazing areas, rehabilitation of degraded communal grazing areas, and range- lands as a way of improving pasture availability. Research and development priorities and emerging issues include conservation agriculture (CA), use of legume-based crop- ping systems, integrated nutrient management (INM), climate-resilient livestock and feed systems, value addition policies, and adoption of innovative technologies.
Effects of tillage and cropping systems on maize and beans yield and selected yield components in a semi-arid area in of Kenya
(Tropical and Subtropical Agroecosystems) Karuma, Anne N; Gachene, Charles K. K; Gicheru, Patrick T; Mtakwa, Peter W; Amuri, Nyambilila A
Farmer-Focused tools to improve soil health monitoring on smallholder farms in the Morogoro region of Tanzania
(The American Phytopathological Society) Testen, Anna L; Mamiro, Delphina P; Nahson, Jackson; Amuri, Nyambilila A; Culman, Steven W; Miller, Sally A
Increasing maize yields with soil testing and subsides in Tanzania
(FEED THE FUTURE) Harou, Aurélie P; Madajewicz, Malgosia; Michelson, Hope; Palm, Cheryl A; Amuri, Nyambilila A; Magomba, Christopher; Semoka, Johnson M; Tschirhart, Kevin; Weil, Ray
Increasing maize yields with soil testing and subsides in Tanzania
(FEED THE FUTURE, 2020-09) Harou, Aurélie P; Madajewicz, Malgosia; Michelson, Hope; Palm, Cheryl A; Amuri, Nyambilila A; Magomba, Christopher; Semoka, Johnson M; Tschirhart, Kevin; Weil, Ray
Though the use of fertilizers can enhance productivity and increase profits for small-scale farming families, two barriers to their adoption have proved critical. First, many farmers often cannot afford to buy fertilizers; second, use recommendations from government sources may not be appropriate for specific farms. In Tanzania, 1 our multi-disciplinary team used low-cost soil testing to pair field-specific recommendations with subsidy vouchers to help cover the cost of fertilizer purchase. Our results show that farmers benefitted significantly in both yields and profits when (1) fertilizer recommendations were calibrated to the needs of individual farms and (2) a subsidy made the recommended fertilizers affordable.
Potential of soil fertility management to improve essential mineral nutrient concentrations in vegetables in Dodoma and Kilombero, Tanzania
(Scientific Research Publishing Inc., 2017) Amuri, Nyambilila A; Mhoro, Lydia; Mwasyika, Tumaini; Semu, Ernest
Collective efforts to fight mineral nutrient malnutrition in humans require consideration of soil fertility management practices (SFMP) in vegetable pro duction. This study aimed at establishing the relationship between SFMP and vegetable nutrient concentration for human health in farming systems of Tanzania. Soil and vegetable samples collected from vegetable growing areas in Kilombero and Dodoma were analyzed for chemical properties and mineral nutrient concentration. Descriptive statistics, analysis of variance and correla tion analysis were employed. The results showed that soil pH in Kilombero ranged from 6.04 to 6.8 and in Dodoma ranged from 6.23 to 8.58. The organic C was low, ranged from 0.10% to 1.87%. All soils studied had sufficient Zn (0.45 to 29.3 mg/kg), Cu (0.71 to 3.23 mg/kg), Fe (3.70 to 171.7 mg/kg) and Mn (2.84 to 41.38 mg/kg). Zinc concentration in all vegetables ranged from 12.57 to 134.54 mg/kg, 14% of vegetables had low Zn (<20 mg/kg) for human health. The Cu concentration in vegetables ranged from 0.07 to 52.37 mg/kg, and vegetables from Kilombero had very low Cu (<0.10 mg/kg) for plant and human nutrition. Vegetable Fe and Mn concentration ranged from 152.95 to 1780 mg/kg and 35.10 to 321.82 mg/kg, respectively. The SFMP used did not affect mineral micronutrients concentration in vegetables, but affected soil Zn, Cu, Fe and Mn concentrations. Soil pH, Zn, and CEC correlated with vegeta ble Cu, K, Mg, Zn, P and Fe concentrations, and differed among soils. There fore, soil properties differed with SFMP, and both determined mineral con centrations in vegetables for human health.