maintaining soil productivity is one of the key factors in sustainable agriculture. soil erosion reduces soil productivity over a long-term period of time. therefore, determining soil erosion tolerance is necessary for sustainable agriculture production. in this study, the long-term effects of erosion on soil productivity in the typical kohin watershed were evaluated. the soil productivity inde...

Abstract The scientific basis of the paper is concept renewability oil and gas resources. In accordance with this concept, purpose to estimate volumetric rate natural replenishment reservoir using example long-developed Bibieybat Garadag condensate fields in South Caspian Basin (SCB). methodological approach assessment based on authors' assumption that at late stage field development, recoverab...

this experiment was conducted to study the effect of transplanting date of onion set and transplant on earliness of onionpopulationsin khuzestan province at behbahan agriculture research station in khuzestan province and farm of baghe-e- malek region within one year (2013-14). experiment was performed in split factorial based on rcbd with three replications. main plot consisted of propagule typ...

Onion (Allium cepa L.) is a vegetable that is widely consumed due to its flaouring and healthpromoting properties. A randomized complete block factorial experiment was carried out in Payame Noor University, Marivan center, in order to study the effects of rates of nitrogen, phosphorus and sheep manure on the yield and quality of onion. The first factor consisted of two sheep manure levels (0 an...

This paper deals with variations in biomass and in the production of Eichhornia crassipes (water hyacinth) in a eutrophic tropical reservoir. Net production was assessed by both a traditional method and a demographic approach. The initial biomass ranges from 96 g DW.m-2 to a maximum of 2027 g DW.m-2. Net production estimates varied greatly according to which method was used to calculate them (t...

In an on-going effort of the FoSHoL project of ActionAid Bangladesh to evaluate the farmers’ perception and effect of system of rice intensification on the yield, 85 farm families of Tala, Satkhira Sadar, Biswamvampur, Noakhali, Ulipur and Koira Upazilla of Satkhira, Sunamganj, Noakhali, Kurigram and Khulna districts conducted the study in their own lands in a participatory action research appr...

Formulation of the problem. The basis modern energy − various types power plants, which thermal plants is about 40 %. technology electricity production at harmful due to generation large amounts waste. They account for more than 30 % emissions substances from total industrial enterprises. Increased demand causes an increase in their production, leads amount ash and slag waste into atmosphere. p...

introduction energy and environmental issues are two common concerns of modern societies. fossil fuels consumption is believed to be the primary factor contributing to severe environmental problems, such as global warming, climate change and acid rain, which are a serious threat to the world’s ecosystems. in order to stabilize the earth’s climate and prevent further global warming, the earth re...

Approximately 2 X 10 ton biomass is produced on land and in water annually (l). Cellulose is the principal structural material in the cell wall of all plants (2). In addition, cellulose can be found in algae, bacteria, and animals (tunicates). Assuming that the average source contains 50% cellulose (Table 1) (35), then approximately 1 X 10 ton cellulose is formed each year. This makes cellulose...