Browsing by Author "Mwatawala, Maulid W."
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Item Contribution of round potato production to household income in Mbeya and Makete districts, Tanzania(Journal of Biology, Agriculture and Healthcare, 2014) Mende, Dorah H.; Kayunze, Kim A.; Mwatawala, Maulid W.In Tanzania, agriculture remains the largest sector of the economy, and hence its performance has substantial impacts on income and poverty. Round potatoes are grown in all continents under various climatic conditions. Smallholder farmers in Mbeya Rural and Makete Districts in Tanzania recognise the potential of round potatoes as a crop contributing significantly to household income and food security. The purpose of this study was to determine the contribution of potato production to household income in Mbeya and Makete Districts in the southern highlands of Tanzania. The specific objectives of the research were to: (1) analyse round potato production and other crops grown in the study area, (2) assess household income from round potato and from other sources in the study area and (3) determine the impact of round potato production on household income. A cross-sectional research involving 233 potato farmers was conducted in March 2012 through structured interviews using a questionnaire, focus group discussions and key informant interviews. The dependent variable, household income, was regressed on eight independent variables to find the impact of each of them on the dependent variable. The results showed that there was high positive significant impact of income from round potato per adjusted adult equivalent unit (AAEU) on household income (p < 0.001). It is concluded that round potatoes are more profitable than other major crops grown in the study area. Moreover, if given due attention and care, round potatoes can contribute greatly to household income. It is recommended that the government should support farmers in terms of availability of inputs, training on improved agricultural technologies and support for research on round potatoes so that they can help increase household income.Item Effects of Hexanal and Calcium Chloride Post-Harvest Treatments in Management of Fresh Mango (Mangifera indica) Quality(Springer, 2022-07) Baltazari, Anna; Mtui, Hosea D.; Mwatawala, Maulid W.; Chove, Lucy M.; Msogoya, Theodosy; Samwel, Jaspa; Paliyath, Gopinadhan; Subramanian, JayasankarAbstract Experiments were conducted at the Sokoine University of Agriculture to assess the effects of hexanal at (0.02%) (volume/volume) and calcium chloride (2%) (weight/volume), on post-harvest quality of mango (‘Palmer’ and ‘Apple’) under different storage conditions and durations. A three factors factorial experiment was used for each variety and replicated six times. The fruits were stored at ambient temperature (28 ± 2 °C) or reduced temperatures (18 ± 2 °C) storage conditions. Data included physiological weight loss (PWL), fruit firmness, total soluble solids (TSS), titrat- able acidity (TA), TSS/TA ratio, vitamin C, total flavonoids, reducing sugar and total sugars which was collected at 0, 4, 8 and 12 days after harvest. Results indicated that hexanal and calcium chloride significantly (p \ 0.001) reduced mango PWL and improved fruit firmness and TSS of both varieties compared to untreated fruits. Hexanal-treated fruits maintained high vitamin C, total flavonoids, total and reducing sugars irrespective of the storage conditions. Vitamin C and total flavonoids of mango fruits decreased with storage time, whereas total and reducing sugar contents increased with storage time. Both treatments maintained physico-chemical qualities of mango fruits, when stored under reduced temperature storage. Keywords; Physiological weight loss , Fruits firmness , Total soluble solids (TSS) , Titratable acidity (TA) ,TSS/TA ratio , Vitamin C , Flavonoids , Reducing sugar , Total sugarItem Effects of storage conditions, storage duration and post-harvest treatments on nutritional and sensory quality of orange (Citrus sinensis (L) Osbeck) fruits(Taylor & Francis Group, 2019-10-15) Baltazari, Anna; Mtui, Hosea D.; Mwatawala, Maulid W.; Chove, Lucy M.; Msogoya, Theodosy; Samwel, Jaspa; Subramanian, JayasankarThe fruits of Msasa and Jaffa orange varieties were harvested and subjected to post-harvest treatments namely; dipping in hexanal, dipping in calcium chloride and compared with untreated control; and they were stored at ambient (28 ± 2° C) and reduced temperatures (18 ± 2°C) conditions. Data were collected on the 0, 4 th , 8 th , and 12 th days from the date of fruit harvest. Chemical analyses were conducted to determine vita- min C content, total sugars, reducing sugars and total flavo- noids. Post-harvest treatments had a significant effect on vitamin C and total flavonoids of Jaffa orange fruit. Hexanal treated fruit had higher values of total flavonoids, vitamin C, and total sugars compared to calcium chloride treated and control fruit. The storage durations showed significant effects on the vitamin C content of Jaffa, total flavonoids, the total and reducing sugars of both fruit varieties. Vitamin C and total flavonoids decreased with increasing storage duration of fruit. The significant interactions of factors were observed on total sugar which was increasing with increasing storage duration, but higher in hexanal treated and ambient stored fruit. Based on consumer acceptance test, the hexanal treated fruits were the most liked followed by calcium chloride treated and untreated fruits based on the appearance, taste, texture and overall acceptability.Item Entitlement to food security approach explaining food security in the Southern Highlands of Tanzania more than other theories(Asian Economic and Social Society, 2015) Mende, Dorah H.; Mwatawala, Maulid W.; Kayunze, Kim A.Data for this paper were collected in Mbeya and Makete Districts, Tanzania, in 2012 from 233 households with the specific objectives to determine proportions of food secure and food insecure households; rank some indicators of entitlements and those of Malthusians, Anti-Malthusians and Woldemeskel‟s contentions with regard to their relationship with food security; and determine the impact of the above indicators on dietary energy consumed per adult equivalent per day, which was the dependent variable. The independent variables were household size, number of agricultural technologies used, number of cattle owned, income from non-agricultural activities, monetary values of household assets, farmer group membership, years of schooling of household head and kilograms of fertilizer used. The dependent variable was regressed on the eight independent variables to find the impact of each of them on it. Entitlement to food security in terms numbers of cattle owned, farmers‟ group membership and non-agricultural activities were found to be more important factors enhancing food security. Addressing these factors could improve food security in the study area. It is recommended that the government and policy makers should support farmers in other income generating activities besides agriculture to increase their purchasing power for higherItem Food security incidences based on monetary and caloric poverty lines in Mbeya and Makete Districts, Tanzania(IISTE - Developing Country Studies, 2014) Mende, Dorah H.; Kayunze, Kim A.; Mwatawala, Maulid W.In Tanzania, a food monetary poverty line of TZS1 10,219 per adult equivalent for 28 days in 2007 prices and a caloric poverty line of 2,200 kcal per adult equivalent per day are used. However, it is not known where their uses give similar incidences of food security. Generation of empirical information on this was worthwhile to inform choices of which of the lines should be more preferable. This study sought to determine food security based on monetary and caloric poverty lines in Mbeya and Makete Districts. The specific objectives of the study were to: (1) Determine food security based on the national monetary poverty line, (2) Determine food security based on caloric food poverty line, and (3) Compare food security incidences based on the two poverty lines. Multistage sampling was used to select 233 households. The research was a cross-sectional one and was conducted through structured interviews using a questionnaire, focus group discussions and key informant interviews. Using the national food monetary and calorific food poverty lines, it was found that 82.8% and 79.0% of the 233 sampled households were food secure in Mbeya and Makete respectively. Monetary and caloric food poverty lines gave almost similar results of food security incidences, albeit the monetary food poverty line gives slightly higher food security incidences. It is concluded that the two poverty lines give almost similar food security incidences and have good potential to give reasonable results of food security status. It is recommended that the government and other stakeholders dealing with food security should use both food poverty lines almost equally since they give almost the same results.Item Impact of round Potato production on household food security in the Southern Highlands of Tanzania(Food Science and Quality Management, 2015) Mende, Dorah H.; Kayunze, Kim A.; Mwatawala, Maulid W.Smallholder farmers in Mbeya Rural and Makete Districts recognise food insecurity as a problem affecting them. They also recognise the potential of round potato as a crop contributing to household food security. However, the extent to which the crop contributes to food security had not been quantified. The purpose of this study was to determine the contribution of potato production to household food security in Mbeya and Makete Districts in the Southern Highlands of Tanzania. The specific objectives of the paper are to: (1) analyse round potato production and other crops grown in the study area, (2) assess food security in terms of dietary energy consumed (DEC) and (3) determine the impact of round potato production on food security. Multistage sampling was used to select 233 potato farmers. The research was a cross-sectional one and was conducted mainly through structured interviews using a questionnaire, which was supplemented with focus group discussions and key informant interviews. The dependent variable, food security in terms of dietary energy consumed per adult equivalent per day, was regressed on seven independent variables to find the impact of each of them on the dependent variable. The variables were household size, age of household head, DEC from potato, income from potato, income from other crops, years of schooling of household head and income from non-agricultural activities. The results showed that there were positive significant impacts of DEC from potato, household size and income from nonagricultural activities on food security. It is recommended that the government should support farmers in terms of availability of inputs, training on improved technologies and support research on round potato.Item Impact of sugarcane contract farming arrangements on smallholder farmers’ livelihood outcomes in Kilombero valley, Tanzania(IISTE, 2019) Machimu, Gervas M.; Kayunze, Kim A.; Mwatawala, Maulid W.Sugarcane Contract Farming (CF) has been mentioned to be an important practice and an engine for improving livelihoods among farmers in Africa. However, in Tanzania there has been limited research on explaining the impact of sugarcane contract farming arrangements on smallholder farmers’ livelihood outcomes. The purpose of this paper was to determine the impact of sugarcane CF arrangements on smallholder farmers’ livelihood outcomes. The specific objectives of the study (from which this paper is based) were to: (i) identify CF arrangements experienced by smallholder farmers, (ii) measure levels of livelihood outcomes, and (iii) determine the impact of CF arrangements on smallholder farmers’ livelihood outcomes. Data were collected from 300 sugarcane outgrowers in February and March 2014 in Kilombero Valley using a structured questionnaire and an interview guide used for interviews with 14 key informants. Data were analysed descriptively and inferentially whereby the multiple (linear) regression model was used to determine the impact of some CF arrangement’ variables on farmers’ livelihood outcomes. The findings indicated that CF arrangements, variables such as price negotiations made by farmers’ association leaders, sugarcane harvesting arrangements, loans or goods by farmers and the payments follow up made by farmers’ association leaders for the sugarcane sold; expose smallholder farmers to higher risks of low livelihood outcomes. It is recommended that the Sugar Board of Tanzania and farmers’ associations should make sure that the few CF arrangements which negatively affected farmers’ livelihood outcomes are addressed timely. It is recommended that contractual supports provided by sugarcane farmers’ associations should increase farmers’ association leaders’ ability to negotiate for better prices of their sugarcane outputs.Item Oyster mushroom (Pleurotus spp.) cultivation technique using re-usable substrate containers and comparison of mineral contents with common leafy vegetables(Journal of Applied Biosciences, 2014) Mamiro, Delphina P.; Mamiro, Peter S.; Mwatawala, Maulid W.Alternative re-usable substrate containers for fructification are required because plastic bags currently used suffocate soil biotic entities. They are a cost for mushroom farmers who purchase plastic bags in every oyster mushroom crop and they are left as non-biodegradable wastes, which are disposed of to the environment after every oyster mushroom cropping. On the other hand, oyster mushroom contains essential nutritional elements comparable to leafy vegetables. Objectives: The objectives of this study were to determine the effects of substrate types and substrate containers on yield, biological efficiency, size and solid content of oyster mushroom Pleurotus ostreatus; and to compare mineral content of mushrooms produced from different types of substrates to common leafy vegetables. Methodology and results: Substrate containers: clear plastic bags, re-usable substrate containers (RSC), coloured plastic bags, shelved clear plastic bags and substrates: banana leaves, rice straws and maize cobs were used to grow oyster mushrooms. The experiment was carried out in complete randomized block design (CRBD) in a factorial arrangement. The mineral content of oyster mushroom grown on rice straws, Leucaena leucocophala, sorghum grains, banana leaves and maize cobs substrates were compared in a CRBD to those of pumpkin leaves (Curcubita spp.), narrow-leaved African night shade (Solanum villosum), broad-leaved African night shade (Solanum scabrum), cowpea leaves (Vigna unguiculata), cabbage (Brassica spp.), sweet potato leaves (Ipomea batatas), amaranth (Amaranthus spp.) and cassava leaves (Manihot esculentus L.). Mushroom yields and BE in RSC were comparable to non-RSC. The highest yields (1,116.25 g/g) and BE (105.75%) were produced from rice straws substrate in coloured bags followed by RSC (yield 694.6 g/g, BE 65.6%). Mushroom solids content (19.4%) was highest from banana leaves substrates. The highest Fe, Zn, Se and Ca were obtained from amaranth, oyster mushrooms produced from rice straws, narrow- and broad-leaves African nightshade and pumpkin leaves respectively. Conclusion and application of results: The utilization of RSC to produce oyster mushrooms protects the environment from disposed plastic bags which are non-biodegradable and if burned may cause ill-health effect to the human. Additional research is needed to specify quality of material to be used in the manufacture of RSC and specifications to suit cultivation of oyster mushrooms. In addition, consumption of oyster mushrooms in combination with other vegetables complements availability of various essential dietary elements such as Fe, Zn, Se and Ca.Item Reduction of preharvest and postharvest losses of sweet orange (citrus sinensis l. osberck) using hexanal in Eastern Tanzania(John Wiley & Sons, Inc., 2019) Mwatawala, Maulid W.; Baltazari, Anna; Msogoya, Theodosy J.; Mtui, Hosea D.; Samwel, Jaspa; Chove, Lucy M.Fruits are rich in phytochemicals that protect human populations against diseases (Hung et al. 2004; Dauchet et al. 2006; Bellavia et al. 2013). Nutrients contained in fruits include essential vitamins, minerals, antioxidants, fibers, and carbohydrates that improve the quality of the human diet (Barrett 2007). For example, sufficient daily consumption of fruits can reduce the risks of diabetes, hypertension, heart diseases, and certain types of cancer (Bazzano et al. 2002; Yao et al. 2004). According to FAO/WHO (2003), up to 2.7million lives could potentially be saved each year with sufficient intake of fruits and vegetables. Much of the world’s population, however, does not consume the recommended intake of at least 100g per day of fruits daily. Global production of citrus fruits increased from 144 876 944 tonnes in 2015 to 146 429 018 tonnes in 2016 (FAO 2017). This was coupled with increased global demand for fresh fruits (Weinberger and Lumpkin 2007). Sweet orange (Citrus sinensis L. Osberck) is an important tropical fruit with high global demand. Sweet oranges are consumed fresh or processed as juice. Although citrus production increased moderately in several countries in the last decade, it fell in the USA. However, citrus fruit continues to be an important crop for satisfying food and nutrition needs (United States Department of Agriculture 2018). Sweet orange is a good source of potassium, folate, and vitamin C (Turner and Burri 2013). Vitamin C is an antioxidant that lowers risks of cancer, cataract formation, and heart‐related diseases (Harats et al. 1998; Jacques et al. 1997). Folate is necessary for DNA and protein synthesis (Turner and Burri 2013), while potassium helps to maintain normal blood pressure. Sweet orange also contains phenolic compounds that are important antioxidants (Rapisarda et al. 1999; Turner and Burri 2013). Production of sweet orange is a source of employment, income, and livelihood to large, medium, and smallholder farmers in various parts of the globe. Global production of sweet orange increased from 116 million tonnes in 2008 to 124 million tonnes in 2017 (FAO 2017). However, despite the demand due to the nutritional and health benefits, many fruits are highly seasonal and perishable with high preharvest and postharvest losses and wastages (Idah and Aderibigbe 2007). Postharvest losses in fruits and vegetables were estimated to be 30–40% in developing countries (Karim and Hawlader 2005). This chapter presents findings from trials on the effectiveness of different preharvest and postharvest treatments on orange fruit quality. The chapter also provides background information on production, socioeconomic importance, and constraints to orange production in Tanzania.