Browsing by Author "Stuetz, W."

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Consumption intensity and production constraints of indigenous vegetables: a step in African food and nutrition security
(Margraf Publishers GmbH, Weikersheim Kanalstrasse 21, 97990Weikersheim, 2018) Mbwana, H.; Kinabo, J.; Stuetz, W.; Rybak, C.; Mutabazi, K. D.; Sieber, S.; Konrad, H.; Ski, B.
Food and nutrition insecurity has been a major challenge in Africa. Farmers need to diversify food production in order to alleviate food and nutrition insecurity. With climate change at hand, indigenous vegetables can provide prospects to diversify production systems and improve food, nutrition and income security in many countries. Regardless of their potential, the extent of consumption and diversity of indigenous vegetables in lessening food, nutrition and economic insecurity are not fully exploited in Tanzania. Estimation of consumption intensity of these vegetables is important to understand how their utilisation can be enhanced at the household level. The study evaluated consumption intensity and production constraints of indigenous vegetables. The study was carried out on 600 farm households from four villages in Dodoma and Morogoro, Tanzania. A multi-stage sampling procedure was used to select districts, villages and households. Districts were selected purposively based on their different agro-ecological characteristics and data was collected using a structured questionnaire. The mean consumption of indigenous vegetables was high in 74% of households, but the quantities were below 80% the recommended daily intake (RDI) in 72–96% of households. The mean intakes of vegetables were significantly (p < 0.001) different among the two agro ecological zones. Age of household head, household size and distance to a water source influenced consumption intensity of indigenous vegetables. Identified production constraints were lack of knowledge on the vegetables for example; production practices, cooking methods, utilisation and preservation methods; lack of seeds, low yields and competition with some exotic. The diets of rural community were somehow deficient in terms of different vegetables and amount consumed thus contributing to high prevalence of undernutrition and micronutrient malnutrition. Therefore, strategies that could promote consumption intensity of indigenous vegetables such as health and nutrition education and involving young and male decision makers, extension services and production of these vegetables in home gardens should be employed.
Consumption of dark green leafy vegetables predicts vitamin a and iron intake and status among female small-scale farmers in Tanzania
(Nutrients/ MDPI, 2019) Stuetz, W.; Gowele, V.; Kinabo, J.; Bundala, N.; Mbwana, H.; Rybak, C.; Eleraky, L.; Lambert, C.; Biesalski, H. K.
Inadequate consumption of micronutrient-dense foods such as vegetables and meat are an important contributing cause for anemia and deficiencies of iron and vitamin A in rural communities of Tanzania. A cross-sectional study was conducted in 2016 to examine nutritional and micronutrient status and their associations to the diet of female small-scale farmers in the sub-humid Kilosa (n = 333) and the semi-arid Chamwino (n = 333) districts, in the Morogoro and Dodoma region. An overall higher prevalence of overweight (19.7%) and obesity (7.1%) than of underweight (5.9%) was detected. Significantly more women in the two villages of Kilosa (27–40%) than in the two villages of Chamwino district (19–21%) were overweight/obese, but also more frequently had anemia (34–41% vs. 11–17%), iron deficiency (24–32% vs. 15–17%), and low serum retinol (21–24% vs. 8–9%). Overall, only a small proportion of women reached recommended daily micronutrient intakes: 27% for vitamin A, 17% for iron, 7% for zinc, and 12–38% for B-vitamins. The amount of dark green leafy vegetables (DGLV) consumed was the main determinant of vitamin A and iron intake by women in Chamwino and corresponded to higher hemoglobin, serum retinol and iron status than in the villages of the Kilosa district; in agreement, DGLV consumption also predicted iron and vitamin A intake in Kilosa district. DGLV consumed with wholemeal millet was advantageous in terms of women’s vitamin A and iron intake and status over the predominantly maize-rice-based diet lacking vegetables.
Farmers' knowledge and traditional processing practices of pigeon peas (Cajanus cajan) in Rural Areas in Lindi Region Tanzania: a quantitative and qualitative mixed study
(AJOL, 2024) Tiisekwa, A.B.; Chove, B.E.; Mongi, R.; Raybak, C.; Stuetz, W.
Pigeon peas (Cajanus cajan) are an important protein source in many parts of tropical and sub-tropical regions of the world. However, their quality and availability may be affected by post-harvest handling and processing practices in use. In the present study, knowledge and practices of pigeon pea growers (PPG) in Lindi Region were evaluated with respect to harvesting, storage, processing and cooking preparation. A sample of 597 randomly selected PPG from two villages, were interviewed and 60 farmers participated in focus group discussions. Majority PPG (83.6%) harvested pigeon peas (PPs) by cutting and putting them in polyethylene sacks while 86.6% had knowledge on only one storage method. Also, majority of PPG (77%) lacked any processing knowledge on mentioned methods such as hulling and solar drying. Results also indicated 75.7% of PPG having no knowledge on cooking preparation methods out of which 94.5% had no knowledge on soaking, 89.6% on use of bicarbonate and 89.9% on methods to increase shelf life of PPs. Overall, 49.4% had little/limited knowledge on harvesting, storage, processing, and cooking preparation practices, with no significant gender difference. All PPG prepared stew using green or dry PPs. A sizeable proportion (45%) of PPG used dry PPs for stew preparation, after traditional hulling. The threshing of peas from pods was carried out manually. Traditional methods in the Lindi Region are laborious and time-consuming; resulting in poorly prepared products thus affecting the appearance of processed PPs. Training farmers on proper postharvest handling and processing can improve food security and market appeal.
Farmers' knowledge and traditional processing practices of pigeon peas (cajanus cajan) in rural areas in Lindi region Tanzania: a quantitative and qualitative mixed study
(Tanzania Journal of Agricultural Sciences, 2024) Tiisekwa, A.B; Chove,B.E; Mongi,R; Rybak, C; Stuetz, W.
Pigeon peas (Cajanus cajan) are an important protein source in many parts of tropical and sub-tropical regions of the world. However, their quality and availability may be affected by post- harvest handling and processing practices in use. In the present study, knowledge and practices of pigeon pea growers (PPG) in Lindi Region were evaluated with respect to harvesting, storage, processing and cooking preparation. A sample of 597 randomly selected PPG from two villages, were interviewed and 60 farmers participated in focus group discussions. Majority PPG (83.6%) harvested pigeon peas (PPs) by cutting and putting them in polyethylene sacks while 86.6% had knowledge on only one storage method. Also, majority of PPG (77%) lacked any processing knowledge on mentioned methods such as hulling and solar drying. Results also indicated 75.7% of PPG having no knowledge on cooking preparation methods out of which 94.5% had no knowledge on soaking, 89.6% on use of bicarbonate and 89.9% on methods to increase shelf life of PPs. Overall, 49.4% had little/limited knowledge on harvesting, storage, processing, and cooking preparation practices, with no significant gender difference. All PPG prepared stew using green or dry PPs. A sizeable proportion (45%) of PPG used dry PPs for stew preparation, after traditional hulling. The threshing of peas from pods was carried out manually. Traditional methods in the Lindi Region are laborious and time-consuming; resulting in poorly prepared products thus affecting the appearance of processed PPs. Training farmers on proper postharvest handling and processing can improve food security and market appeal.
Provitamin a carotenoids, tocopherols, ascorbic acid and minerals in indigenous leafy vegetables from Tanzania
(MDPI, 2019) Gowele, V. F.; Kinabo, J.; Jumbe, T.; Kirschmann, C.; Frank, J.; Stuetz, W.
The essential micronutrients in indigenous leafy vegetables (ILVs) could substantially contribute to the micronutrient supply in rural communities in Tanzania, but concentrations differ between species. Provitamin A carotenoids, tocopherols, ascorbic acid, minerals, and phytate were analysed in 13 different species using HPLC-, ICP-OES, and photometric techniques. Eight of the 13 ILVs, including Amaranthus ssp. and Sesamum angustifolium, had high -carotene concentrations (2.91–4.84 mg/100 g fresh weight), which could provide 50% of vitamin A’s recommended nutrient intake (RNI). Six ILVs including Cleome hirta and Sonchus luxurians had high iron contents (34.5–60.4 mg/100 g, >50% RNI); Amaranthus ssp. represented the ILV with high calcium, magnesium and zinc contents (85%, 207% and 21% of RNI per 100 g); Cleome hirta and Cleome gynandra had high ascorbic acid contents (>15 mg/100 g, 34–35% of RNI), while Sesamum angustifolium was the only ILV with a high tocopherol content (7.34 mg -TE/100 g). The highest phytate concentration was found in Amaranthus ssp., which could negatively affect its role as a very good source of minerals. Results indicate that the analysed ILVs could make a substantial contribution to the vitamin A and iron supply in the diets of rural Tanzanian populations.
Rural agriculture for improved nutrition: stakeholder insights from different sectors in Tanzania
(CUVILLIER VERLAG, 2017-09) Mbwana, H.; Kinabo, J.; Reif, C.; Stuetz, W.; Sieber, S.; Mutabazi, K. D.; Biesalski, H. K.
Nutrition sensitive pathways and approaches involving agriculture are being recognised as essential to guarantee nutrition security and lessen undernutrition. In Tanzania, the majority of the population lives in the rural areas and 80% depend on agriculture as the main source of livelihood. Although agriculture can play a big role in alleviating undernutrition, its role in tackling malnutrition needs to be dealt with based on policies to the actual implementation. This study aimed to investigate perspectives of stakeholders on links between rural agriculture and nutrition, opportunities and challenges, evidences and policy inferences. Methodology: Open ended interviews were conducted with 11 stakeholders identified for the Scale-N project in Tanzania who contribute in one way or another to the nutrition sector. Two focus group discussions with 20 farmers from Mzula and Tindiga villages in Dodoma and Kilosa were conducted. Stakeholders acknowledged obstacles to better achievement of undernutrition reduction which included absence of clear cut motivations in the agriculture sector regarding enhancing nutrition, concentrating on cash crops, lack of accountability for agriculture matters for improving nutrition, policies exist but putting them into action is hindered, limited competence in the available human resources, absence of coordination between sectors, lack of proof that agriculture works for nutrition and economic constraints to support agriculture. Possible measures mentioned to be taken to improve rural agriculture for better nutrition including home gardening with different crops, nutrition training, better access to markets and labour saving technologies to women. From the farmers’ side, 13 mentioned lack of extension services, 17 mentioned lack of access to agricultural productive resources, lack of knowledge about nutritious and safe food and the majority mentioned increased occurrences of natural disasters such as floods and serious drought. Numerous possibilities are present to strengthen the role of agriculture on nutrition in Tanzania, however, there is need to strengthen the structure and making of policies which will in turn need proper implementation for the desired success.
A tailored nutrition education intervention improves women’s nutrition knowledge and dietary practices in farming households of Tanzania
(Symbiosis Group, 2020-02-17) Bundala, N.; Kinabo, J.; Jumbe, T.; Rybak, C.; Stuetz, W.; Sieber, S.
A study was carried out to assess the effectiveness of a nutrition education intervention among women residing in the villages of Dodoma and Morogoro regions of Tanzania. Prior to the intervention, a baseline survey was conducted in July-August 2016. The survey involved 663 women who completed a pre-test assessment for nutrition knowledge and practice and enrolled in nutrition education intervention. The intervention was carried out for 8 months (September 2017 to April 2018) including a 10 days group training per village with six-month individual training follow-ups in the household. Spouses/ adult men were also invited to participate in the intervention. Training content included; functions of food, food groups, malnutrition, food preparations, food consumption and homestead food production. Women were given a post-test during the endline survey (July-August 2018) to assess the intervention. Nutrition knowledge (NK), Nutrition Practice (NP) as well as a combination of Nutrition Knowledge and Practice (NKP) were computed using a scoring method as per FAO guidelines. The test was scored in a range of 0-10 for NK and NP and 0-20 for NKP. The median scores before and after the intervention were compared using the Wilcoxon signed-rank test. The NKP scores among sub-groups of respondents were computed using Mann–Whitney and Kruskal Wallis tests. Changes in proportions were calculated using a McNemar test. Results indicated a significant increase in the post-intervention median scores (interquartile range) than the pre-intervention median scores (interquartile range) for NK, NP, and NKP; 7(5,7) vs 4(3,5), 5(4,6) vs 3(2,4) and 12(10,13) vs 7(5,9) respectively, p<0.01. Higher scores were found among those who had received nutrition education, those who had frequently been exposed to nutrition education, those whose spouses/men participated in the intervention and those with a formal level of education than their counterparts. A significant increase in the frequencies of consumption of vegetables, fruits and legumes were noted from the baseline to the post-intervention phase in the end-line (87%-98%, 63%-69% and 76%-87%) respectively. The findings suggest the effectiveness of the nutrition education in the promotion of nutrition knowledge and desirable dietary practices in farming households of Tanzania.