Department of Forest and Environmental Economics

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Browsing Department of Forest and Environmental Economics by Subject "Agroforestry"

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    Attitude, adoption and economic potentials of Agroforestry in Kilosa district, Morogoro region - Tanzania
    (Sokoine University of Agriculture, 2014) Luumi, Fransisca
    Agroforestry have been proposed as the solution to the prevailing deforestation and land deterioration in developing countries like Tanzania. This study aimed at determining farmer’s attitude, adoption and economic potentials of agroforestry practices in Kilosa District. Specifically it was intended to describe agroforestry systems and technologies, examining the level of attitudes towards agroforestry, identifying socio-economic factors influencing agroforestry adoption and estimating costs and benefits of agroforestry. Primary data were collected using structured questionnaire which was administered to a random sample of 120 households in four villages while data from key informants were collected using checklist. Secondary data from various sources were used to supplement the primary data. Data were analysed using Excel Software where cost benefit analysis was generated and Statistical Package for Social Sciences where descriptive statistics, factor analysis and logistic model were generated. Results revealed that agroforestry systems practiced were agrosilvopastoral and agrosilvicultural arranged in mixed intercropping, boundary planting and homegardens. The majority of the respondents had a positive attitude towards; commercialization (90%), land resource conservation (89%) and land productivity (82%). Farm labour force, attitude towards; land productivity, commercialization and land resource conservation significantly influenced adoption of agroforestry at P <0.05. The selected agroforestry systems were economically viable at discount rate of 10% and on average had positive Net Present Value of 3,309,680Tshs, Benefit Cost Ratio of 1.6 and Internal Rate of Return was 73% indicating the worth of investing in agroforestry. Conclusively respondents appreciated the contribution of agroforestry in meeting the diverse needs to uplift their socio-economic status. The study suggested that the government and development agencies should strengthen education, training and agroforestry extension programs. Further, agroforestry disseminators should improve the benefits of agroforestry since high attitude towards agroforestry were due to the respondents’ perception that investment in agroforestry was associated with more benefits than costs.
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    Biomass, volume and nutrient accumulation by six-year old acacia albi da under agroforestry at Mafiga, Morogoro, Tanzania
    (Sokoine University of Agriculture, 1988) Okorio, John
    The study was conducted to evaluate the suitability of Acacia al bi da for fuelwood and environment fodder at production using Mafiga, Morogoro. agroforestry in a semi-humid The trial was planted in February, 1980 and arranged in a split - plot design with three main plots: 1)Acacia intercropped with maize, 2)Acacia intercropped with beans, and 3)Acacia monoculture cleanweeded. Each mainplotincluded at4 x4 m, planted four tree 5 x spacing subplots, no trees, trees 5 m and 6 x 6 m. The experiment had four replications covering an area of 4.32 ha. In March 1986, thirty trees representing all the diameter classes in the trial content. root harvested and used to determine volume, biomass and nutrient were addition, In di stribution, biomass collected sampleswere macronutrients. eight root systems were excavated to determine and nutrient content. Seventy-two soil from the different treatments and analysed for Data on height, diameter growth and food crop yields (maize and beans) for the past six years was compiled from past records. At the age of the whole neither six years, the mean height and DBH for Acacia al bi da in trial was 8.41 m and 10.7 cm respectively. affected Height growth was by intercropping nor tree spacing, but.diameter growth was affected by tree spacing. Volumeproduction varied from 9.9 to valuesranged 19.6 to 43.1 from 24.9 m3 ha 1 and total biomass tons ha'1 . Intercropping did not (p < 0.05) influence the production of volume and biomass. significantly significantly Spacing,however, biomassproduction with (p < 0.05) influenced both volume and higher volume and biomass under lower spacing and the lowest volume and biomass under the highest spacing. Nutrient concentrations were high and comparable to other tree legumes. Generally,nutrient brushwood,and least concentrations were highest in the foliage and in the stem, with concentrations in the roots and branches being intermediate. for Except the nutrient N, and brushwood roots, The Thenutrient accumulation (4 x 4 m) in Kg ha spacing 57.6, with the Mg and were highest in the stem, least amounts found in the foliage and highest inventory of N was concentrated in the foliage. branches. total accumulations 73.8, Na. in the aerial biomass at the closest were 262.9, N; 39.4 P; 156.7, K; 97.4, Ca; Corresponding values for the below ground . -1 biomass were 85.0; 8.1; 54.3; 23.5; 18.1; and 8.1 Kg ha . Althoughthere were trends of increasing nutrients under the trees the presenceof Acacia trees did not significantly influence the nutrient status of the soil. Food to -1 crop yields varied from 143.2 to 409.7 Kg ha for beans and 343.8 956.0 Kg ha-l for maize. The yield of the food crops were not
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    Economic potential of selected lesser known and underutilized indigenous agroforestry timber species in Kilosa District in Tanzania
    (Sokoine University of Agriculture, 2015) Mvanda, Godliva Angelus
    The main objective of this study was to determine the economic potential of Lesser Known (LK) indigenous agroforcstry timber tree species mainly Lonchocarpus capassa, Lannen schhnperi, Combrelum adenogonium, Psendolanchnostylis maprouneifolia and Vitex keniensis. Specifically the study aimed al estimating the standing volume of the LK Indigenous Agroforcstry Timber Species (1AGTS) in farms, determine their economic value and estimate their profitability for timber production. Structured and semi structured questionnaires, personal observation, focused group discussion and forest inventory methods were used in data collection. One hundred and twenty households in four villages were sampled purposively. The data was analyzed using the Statistical Package for Sosial Sciences (SPSS) programme version 16 and Microsoft Excel programme. Descriptive analysis was used to generate frequencies, percentages, sums and means which were used to discuss the results. Findings indicated that a total of 7247 trees with volume of 1114.3 m3 were obtained in conserved as Lesser Known IAGTS and hardwood woodlots respectively. The economic value for conserved LK IAGTS and planted hardwood woodlots per household was 328 900 TZS and 3 180 000 TZS respectively. Profitability' at 10% discounting factor, NPV were TZS 4 892 453 and TZS 6 161 247, at 22 and 19 years rotation ages for LK IAGTS practices and hardwood woodlots respectively. Obtained standing volume, total value and average annual income of LK IAGTS in conserved trees and woodlots increases additional income and serves as off farm income to households hence improves livelihoods as well as reducing dependence on the reserved forests. I therefore recommend optimizing production of IAGTS in woodlot at households’ level; hence will improve the conservation of the resources with positive socio-economic implication to farmers.