This study assessing the adoption of three varieties of rice altitude marshes come from the Agricultural Research Center / RUBONA of Rwanda to the soil and climatic conditions of eastern DR Congo, specifically NSRF / Lwiro in Kabare territory in South Kivu. Furthermore, we observed that the rooting of these four varieties length corresponded to that determined by several authors, the longest being that of the control variety (Vo46) followed by the variety FACAGRO 56. This confirmed that soil of eastern DRC is of good structure and texture and is well ventilated; which facilitates root development and mineral nutrition. Variety FACAGRO 908 is placed in first position with respect to the number of productive tillers. This depends on factors like good spacing, early weeding, soil fertility and favorable genetic heritage. As regards the weight of 1000 grains, and Vo46 varieties WAT 1276-22-2 were considered good productivity as giving a higher weight of grain (32g). This difference in weight is due to the size of the seeds of these varieties with respect to others. Irrigated rice is the system that gives the greatest return with 4-8 t / ha of paddy, the results of these tests have shown that all tested varieties are profitable with the head of the ranking, the Vo46 variety. The variety Vo46 had produced 7,26t / ha followed by the variety FACAGRO 908 with 5,567t / ha then comes WAT1276-22-2 with 5,133t / ha and 56 FACAGRO with 5,033t / ha.

This research consisted to the assessment of the degree of pollution of the waters of the Kivu lake: case of the basin of Bukavu, being given the different affluents that himself pours there with all ways of garbages.
The objective of this last is to achieve a qualitative survey of the waters of the Kivu lake according to the ecological norms in the determination of the temperature, the pH, the alkalinity or the acidity, of the dissolved oxygen and of the biologic and chemical demand in oxygen on one hand; and on the other hand the comparison of the pollution degree in the different mentions retained: SNCC, BRALIMA, PHARMAKINA, BWINDI, KAZINGO and RUZIZI, the waters of large having served like witnesses.
After analysis of results, he/it cleared himself/itself what follows:
- The temperature of the waters of the Kivu lake is variable next one seasons with an average of 23°C;
- The waters of the lake are alkali and variable according to seasons;
- The dissolved oxygen is variable between 2,92 and 4,84mg/l, what is an admissible value for a better life in the aquatic middle because lower to 5mg/l.
He/it is therefore conclusive that the waters of the coastline of the Kivu lake in the basin of Bukavu are polluted in the decreasing order in sites of the following manner: SNCC, PHARMAKINA, KAZINGO, BRALIMA and BWINDI.

The environment in the country is threatened particularity in Sud-Kivu in different aspects and one of them which must be taken with care is the pollution made by plastics. Over their presence in dumps, there plastic rubish are found everywhere in roads, streets, avenues even in roads which lead to villages.
In addition, these rubbish are being found in the fields and pastures. After having observed most of beasts with the presence of strange plastics, an hypothesis given by some farmers is that there were plastics covered with oil and salt according to their opinion.
Surely, scientifically we wondered if humanly speaking that is possible whereas these farmers provide cows to butchery. There farmers make their cows swallow plastic materials in order to bring them elsewhere to be bred.
This study was done in order to comprehend exactly what is taking place and the consequences of plastic rubbish and ingested clothes.
With the sample of 1270 beasts slaughtered in the four slaughterhouses, we got 179 beasts having strange elements : 13,4% at Mugogo, 12,1% at Mudaka, 14,7% at Beach Muhanzi and 22,5% specialy for little ruminant at Beach Muhanzi/ Kachoma.
During the research of diagnosis protocol on an animal living emaciated, the reductions approved of ruminating constitute presumptive elements in our area deeply polluted.
The scarcity of farming lands and the one of forage (lack of integral agriculture) situation which render beast to be vulnerable on pica (sickness of flesh).
From there primary results, 24 beasts were diagnosed and confirmed after "laparotomie" in investigation followed by a "rumenotomie".
A experiment of healing by administrating beer "coca-cola" in its selling states destined in human beverage does not give any result as it is the case of "emollients" and "laxactifs". This drink doesn't affect these plastic rubbish in vitro conditions of dose in the mixture of a rumenal sac and coca-cola diluted rate of 50%.