Three options for the sampling design of the field plot clusters of NAFORMA II biophysical survey are compared in this report. Option 1 consists of re-measuring all NAFORMA I field sample plots (3 205 clusters) and Option 2 of re-measuring only those that were established as permanent (848 clusters). The recommended Option 3 is a compromise between these two “extreme” options: Re-measure a subset (1 405 clusters) of NAFORMA I field sample plots including (almost) all permanent clusters and a carefully selected set of other NAFORMA I field plot clusters to obtain a uniform sample within each TFS zone. Design Option 3 has the following features: •Sampling intensity is uniform within each TFS zone. This makes it simple to use the data. For example, mean volumes can be estimated by averages over the plots. •The selected clusters are well-spread over the target population. •The anticipated precision of land-class area and mean wood volume relative to sample size is nearly as good as that of NAFORMA I. •All proposed clusters were measured in NAFORMA I, which enables precise estimation of change based on repeated measurements. The costs and precision were anticipated by utilizing NAFORMA I field data, information about subsequent improvements in the road network, and changes in land-use using satellite imaging derived land-class maps.

What level of government holds powers over forests – and decisions affecting forests – in mainland Tanzania? Which powers and responsibilities are centralized, and which are decentralized? What role can citizens play?

Research Paper (undergraduate) from the year 2015 in the subject Agrarian Studies, , course: BSc. forestry, language: English, abstract: There is high deforestation and forest degradation estimated to be 400,000ha per annum between 1990 and 2013 in Tanzania forests. This is due to the increase in wood demand for energy and for industrial raw materials. The study was conducted to assess forest condition of Sokoine University of Agriculture - Kitulangalo Forest Reserve (SUA KFR). A total of 52 nested circular plots with radii of 2, 5, 10, and 15 m were used to collect data such as diameter at breast height (DBH), height and number of regenerants. Parameters computed for data analsysis were stem per ha (N), number of regenerants, dominant tree species, exotic species, basal area per ha (G) and volume (standing and removed) per ha (V). A total of 71 tree species were identified and recorded during inventory, the average 995±256 stems/ha of different tree species of various DBH class, the average basal area per ha, G=7.961268±0.8 m2/ha and the mean standing total volume, 54.72914±11.3 m3/ha were also computed. The mean total volume removed is 0.58 m3 per ha which is very small compared to stocking. The dominant tree (richness) species includes Julbernardia globiflora (17%), Brachystegia speciformis (8%), Acacia nigrescens (7%), Acacia robusta (6%), Albizzia harveyi (5%), Scierocaryabirrea spp/ Caffra (5%) and others i.e total of all