Browsing by Author "Nsenga, Justus Vincent"

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Resource governance using a hybrid institution in Momba district tanzania: a process approach
(2021-08) Mahonge, Christopher Paul; Nsenga, Justus Vincent; Itani, Juichi; Kurosaki, Ryugo
Natural resource governance fragmentation across scales can inhibit coordinated action and reduce innovation capacity. The presence of bridging actors who connect relevant stakeholder inside governance networks can aid in the resolution of this problem. In this regard, community organization is crucial for effective resource governance. Within the framework of community-based approaches, and using a case study, this study explores the use of a hybrid institution to organize resource governance in Mfuto village in Momba district, Tanzania. The authors use hierarchical and co-governance modes of interactive governance theory to guide the process of data analysis. By applying content and thematic analyses, our observation suggests that building the capacity of the institution and linking it to the wider range of stakeholders are essential steps towards the attainment of anticipated outcomes. Following this, the study highlights four salient steps of an inverted pyramid model (IPM) and are derived from the resource governance initiatives. The study’s implications and limitations as well as future research directions are presented in the concluding section of the study.
The effect of times of contact and rates of minjingu phosphate rock (mpr) on its dissolution in an oxic (kanhaplic) haplustults
(Sokoine University of Agriculture, 2001) Nsenga, Justus Vincent
An incubation glasshouse pot experiment was conducted at the Sokoine University of Agriculture Morogoro, Tanzania to study the effect of time of contact and rates of Minjingu phosphate rock (MPR) applied to an Oxic (Kanhaplic) Haplustults on its dissolution and the release of P and Ca for plant uptake. The soil was mixed with MPR at rates equivalent to 0, 50, 75, 100 and 150 kg P/ha. The incubation periods were 120, 90, 60, 30 and zero days prior to sowing the maize (Zea mays. L. var. Staha). The moisture content in the soil was maintained at about field capacity during the incubation period and throughout the maize growing period with distilled water. Results from this study showed that MPR dissolution increased significantly with increase in MPR rates and incubation period. However, the increase in the amounts of P released tended to increase with time of incubation up to about 75 days and decreased thereafter. Presumably the P released was largely sorbed by Al and Fe oxides in the soil. The amounts of MPR dissolved ranged from 1.17 to 13.11 mg P/kg and 10.74 to 15.91% as regards to extractable P and AP% values, respectively. The interaction between equilibration periods and MPR rates explained about 86.8% of the variation in MPR dissolution, MPR rates predicted about 76.6% of the dissolution of MPR, and 10.3% of the dissolution predicted by equilibration period. The soil pH and extractable Ca were found to increase slightly with increase in MPR rates but decreased with increase in incubation period. The exchangeable acidity and exchangeable Al decreased with increase in MPR rates, and slightly increased with increase in incubation periods. Maize dry matter yields, P and Ca uptakes were found to increase significantly with increase in MPR levels. Elemental P and Ca contents in the plant materials were found to decrease significantly with the increase in MPR rates probably indicating the effect of dry matter yield on nutrient dilution or depletion of phosphate and Ca2+ in the soil. Application of MPR at sowing time led into higher dry matter yields than when applied prior to sowing and increase in incubation period decreased the uptakes of P and Ca though inconsistent with %P and %Ca in the plant shoots. Application of MPR at sowing time was recommended for Oxic Haplustults which are strongly acid, with low amounts of P and exchangeable Ca in order to increase the agronomic effectiveness of MPR.