Nature conservation had become an international preoccupation due to the global rate of deforestation which goes beyond 12 millions hectares. Until 2012, in the whole Congo bassin, the Democratic Republic of Congo had the high rate of deforestation (0.32%) while its reforestation rate was 0.1±0.3%. In this paper, criterion of classification for forest with high value for consevation are studied so to help decision maker on Uma forest conservation.
Biologic diversity, ecosystems and mosaic at the landscape scale, threatened or rare ecosystems and habitats, critic ecological services, needs for community livelihood and cultural value are those criterion of classification. The results are : the mean of the value of plant diversity of Uma was 33.2 ± 6.5; the mean species richness of Uma is higher than other sites. The hugeness of this forest let that it successes to the second criterion and, the presence of some rare habitats to the third criterion. Uma forest is the source of Tshopo river which is used for fishing and on it is built the hydroelectrical station of Tshopo. This forest has many animal and plant species whose are very used by autochthon. Cultural value of this forest is most due to its inselbergs considered as sacral area. Verification of all these criterion is a great proof that Uma forest can be classified among forests with high value for conservation.

Despite their potential yield, the adoption of climbing beans in mountainous South Kivu is limited by the lack of technologies. Thus, appropriate technologies corresponding to poor farmer incomes should be adapted in terms of labour, soil and investment in capital so that intercropping would replace stakes and allow a better soil cover. This study was carried out at Burhale during two cultural seasons A2011 and A2012 in four sites comprising 9 trials each. The varieties used were: maize, soya-bean and beans. NPK and manure were also used. The MOJA was applied in 1st and 3rd trials and the MBILI in 2nd and 4th ones. Monoculture was practiced in 6th, 7th, 8th and 9th trials. Beans were sown 10 to 15 days after maize in 1st and 3rd trials. In 2nd, 4th and 7th trials this happened 20 to 30 days after maize. Soya-beans were sown simultaneously with maize in the 5th MBILI trial and in the 8th monoculture trial. Maize was sown on the experiment launching day. Leguminous plant yield was inferior (259.26; 271.88; 0 and 0 kg.ha-1 respectively for 1st, 2nd, 3rd and 4th trials) to that of monoculture (2711.11 and 1100.18kg.ha-1 respectively for 6th and 7th trials). Maize yield was inferior (7564.4; 5397; 10279.61 and 842.91kg.ha-1 respectively for 1st, 2nd, 3rd and 4th trials) to that of the 9th monoculture trial (7957.4kg.ha-1). Good LERs of 1.01 and 1.25 were found for 1st and 3rd; they were bad (0.76; 0.92 and 0.69) for 2nd, 4th and 5th trials.