Welcome to SUAIRE
Sokoine University of Agriculture Institutional Repository (SUA IR). This repository was built and is maintained by the university library (Sokoine National Agricultural Library-SNAL) , in order to collect, preserve and disseminate scholarly output generated by University research community (staff and students) members.
This repository hosts a variety of openly accessible materials including: scholarly articles and books, theses and dissertations, conference proceedings and technical reports. For assistance about depositing your research output in the repository click here. SUA IR Policy click here or any queries contact us at snal@sua.ac.tz.
Communities in SUAIRE
Select a community to browse its collections.
- The Agroforesty Community is a collaborative network dedicated to advancing sustainable land-use practices that integrate trees, crops, and livestock. It serves as a platform for knowledge exchange, research dissemination, and practical innovations in Agroforestry. By fostering connections among researchers, practitioners, policymakers, and local communities, the Agroforestry Community promotes environmental conservation, enhanced agricultural productivity, and resilient livelihoods.
Recent Submissions
Effect of growth regulators on in vivo shoot proliferation and rooting selected local banana (Musa spp.L.) cultivars
(Sokoine University of Agriculture, 2014) Mwakisitu, Juliana Amos
Dipping banana corms in BAP at 1.5 mg /litre for 12 hours enhances banana sucker
proliferation. Thidiazuron (TDZ) is a growth regulator with both cytokinin and auxin
effect and has a higher residual effect than BAP. The influence of TDZ on shoot
proliferation and root formation in banana is hardly known. The objectives of this study
were to evaluate the effect of (1) in vivo propagation combined with temporary TDZ
treatments on sucker multiplication and growth and (2) indole-3-butyric acid on rooting
and growth of TDZ in vivo derived suckers of banana. The study was conducted at
Sokoine University of Agriculture and comprised of two experiments established in a split
plot arrangement in a randomized complete block design (RCBD). The main factor for
both experiments was banana cultivars (Mtwike, Mzuzu and Bukoba). The sub-factor for
experiment one was TDZ concentrations (0.5, 1.0. 2.0 and 3.0 mg/1) while the sub-factor
for experiment two was 1BA at 0.06 % and control (no 1BA). Data were subjected to
analysis of variance (ANOVA) and mean separation was done based on Student-Newman-
Keuls at P < 5% using GenStat Statistical Programme I2lh Edition. Results showed that
TDZ at 2.0 mg/1 led to the highest proliferation of 6.3 suckers per conn followed by TDZ
at 3.0 and 1.0 mg/1 with 4.6 and 4.0 suckers per corm, respectively. Banana cv. Bukoba
produced the highest number of 6.4 suckers per corm followed by cv. Mzuzu and cv.
Mtwike with 2.9 and 2.3 suckers per corm, respectively. Treatments of TDZ-derived
suckers in IBA powder at 0.06 % reduced root formation and growth. Further studies are
required to determine alternative cytokine-based growth regulators for enhancing banana
shoot productivity under in vivo multiplication
Socio-economic factors influencing adoption of improved goat husbandry practices among smallholder livestock keepers in Chemba District Council, Dodoma Region, Tanzania
(Sokoine University of Agriculture, 2018) Shilangalila, Sebastian Sylvanus
This study was conducted to assess socio-economic factors influencing adoption of
improved goat husbandry practices among smallholder livestock keepers in Chcmba
District Council, Dodoma region. Specifically, the study sought to determine the extent of
adoption of improved goat husbandry practices; to describe the socio-economic factors
that influence adoption of improved goat husbandry practices among smallholder goat
keepers; and to determine the perception of smallholder goat keepers on the adoption of
improved goal husbandry practices. A cross-sectional design was employed involving 128
respondents selected from four villages of Mondo. Paranga, Kclcma balai and Waida.
Structured questionnaire was used to collect primary data; and secondary data were
collected from relevant reports and documents. Focus group discussion and key informant
interview were used to collect qualitative information related to goat husbandry practices.
The Statistical Package for Social Sciences (SPSS) was employed in analyzing primary
data. Content analysis was also used to analyze the qualitative data. Findings showed that
improved goal husbandry practices such as de-worming. dipping, health records were the
most adopted by the smallholder livestock keepers. Improved goat husbandry practices
such as feeding mineral supplement, concentrates, chopped fodder, maintenance of goat
house and orientation of goat shed practices were not adopted. On the other hand, the
results from multiple linear regression analysis showed that annual income farming
experience, sex. household size, herd size, contacting with extension officer and
occupation had statistically significant impact on adoption (p < 0.01 and p < 0.05). The
results further show that, majority of the respondents had positive perception (65.6%)
towards improved goat husbandry practices. The results suggest that the use of improved
goat husbandry practices is an effective way in increasing productivity among smallholder
livestock keepers. However, challenges revolving around financial constraints affected trained goat keepers in making effective use of certain improved goat husbandry practices.
It is recommended that effort should be made by the Government to ensure accessibility
and affordability of inputs.
Economic valuation of forests on general land in Kilosa District, Tanzania
(Sokoine University of Agriculture, 2007) Msemwa, Simeon Charles
The study was conducted to estimate total economic value (TEV) of forests on general
land in Kilosa District, Tanzania. The overall objective was to examine and to capture the
use and non-use values of forest ecosystem in order to estimate the TEV of forests on
general land in the study area. The specific objectives included; identification of forest
goods and services that can be obtained from the forests on general land, quantification of
forest products and estimation of their use and non-use values and the determination of the
opportunity cost of converting the forests on general land into agricultural land. Finally,
the estimation of TEV of current and potential benefit flows to the communities
surrounding the forests on general land. Primary data were collected mainly using
structured questionnaires and secondary data were obtained through literature search. The
willingness to pay (WTP) was used to elicit unit values of the identified forest benefits.
The data collected were coded and analysed statistically using descriptive and inferential
statistics. The estimated current TEV of forests on general land (with their annual present
values in brackets) included direct forest use value (USD 146.1 million), water use value
(USD 17.6 million), soil erosion value (USD 5.5 million), biodiversity and option values
(USD 5.7 million), carbon value (USD 29.4 million) and non-use values (USD 2.6
million). The total current TEV was USD 206.9 million as a total annual net present value
of the forests on general land in Kilosa District, Tanzania. Sensitivity analysis of the forest
TEV was performed using different discount rates (i.e. 1%, 5%, 15% and 20%) as a
variable of interest. The results indicate decrease in the percent change of forest TEV with' ’
the increase in discount rate. Other general land use options in the study area were
mentioned, the main one being agriculture. Agricultural opportunity cost (converting the
forest land into agricultural land) indicates that agriculture is more paying than forest by
USD 5113.69 per hectare per year. The findings of the study reflect the economiciii
importance of the forests on general land to the livelihoods of the rural communities in
Tanzania. The communities are familiar with the benefits from the forests although they
perceive low value of forest products from general land. It is recommended that the forests
on general land should change the current property right regime to a respective formalized
organization, which will define legal and ownership status and thus, influencing the
management options and increase use and non-use values of the forest resource. All
economic values (TEV) of forests on general land should be captured, appreciated and
integrated in any forest management plan. The forest TEV should be used as a
contribution of the forests, in calculating the GDP of Tanzania and also, the TEV should
be used in informing the forestry sector on what forest economic instruments such as right
policies on forest taxes, charges and fees to be put in place.
Peer learning and technology adoption in a digital farmer-to-farmerg network
(Elsevier, 2025-03) Violet Lasdun; Aurélie P. Harou; Chris Magomba; Davíd Guereña
Utilization of dalbergia melanoxylon ( guill.pcrr.) in Tanzania: a case study of Nachingwea District
(Sokoine University of Agriculture, 2011) Opulukwa, Meshack Jeremiah
The study was designed to assess the current status of Dalbergia
melanoxylon (Guill. & Perr.) and examine its uses in Nachingwea
district. Data collection was done using two methods; social survey and
forest inventory. Standard methods for data collection and analysis for
both social survey and inventory' were used. A total of 44 sample plots
(3.08 hectares) were laid out on public land for resource assessment.
Parameters determined included height, stems per hectare, basal area
pei' hectare, volume per hectare and diameter classes. It was estimated
that in 1999 about 1,500 m3 or 37 % of harvested D. melanoxylon in
the country' was exported in the form of carvings and timber
respectively. Internationally, the main use of D. melanoxylon (Guill. &
Perr.) is for the manufacture of musical instruments. For example,
guitar necks or face veneer on piano cabinet. The remaining 63 % was
used for building poles, fuel wood, charcoal, household and household
utensils. Seventy eight percent of people in Nachingwea district did not
prefer D. melanoxylon (Guill. & Perr.) either for fuel wood or for house
construction. This was due to its inferior firewood, fierce flame and
stinging smoke it produces. Also the species does not produce good
poles. Most of the trees are crooked and require too much effort to cut.
Further, the trees are found far away from village centres. The study identified 103 tree species. The number of stems, basal area
and volume per hectare for D. melanoxylon (Guill. & Perr.) was found to
be 20, 1.2 m2 and 8.6 m3 respectively. The stems were distributed in
five diameter classes. The species contributed 8.3 % by volume out of
all tree species. The number of stems, basal area and volume per
hectare for other tree species were 507,
14 m2 and
103.7 m3
respectively also distributed in five diameter classes. Several causes of
depletion of D. melanoxylon were identified in Nachingwea. The major
ones were shifting cultivation, lack of inventory on D. melanoxylon
(Guill. & Perr.), inadequate control of timber harvesting activities and
lack of information on awareness of value and importance of D.
melanoxylon (Guill. & Perr.). About 63 % of the people interviewed did
not now how much a cubic metre of D. melanoxylon (Guill. 8 g Perr.)
costs at the world market. It is recommended that forestry and
environmental education be included in school syllabi and that,
national inventory for the species be carried out in order to know the
existing stock and prescribing sustainable harvesting regime.