131 uppsatser · sida 7 av 9
… energy source which is produced through anaerobic (oxygen free) digestion of organic material. The gas is a mixture of methane (CH4) and carbon dioxide (CO2) and can be among others used as fuel in vehicles. Greengas is biogas produced from grains. The aim with this master’s …
… In this study the production of biogasthrough anaerobic digestion from the organic fraction of municipal solidwaste (OFMSW) was compared to incineration of the waste. At the momentalmost all of the OFMSW in Singapore is incinerated. Three differentscenarios were compared to the …
… herds. Heifers were also found to live longer in loose housing barns and in organic systems. Heifers born or having their first calf during summer or autumn were more likely to live longer than cows born or having their first calf during winter or spring.
… during the ice-free season which contributed to elevated amount of available organic carbon to be mineralized to gas during winter. The absence of a fertilization effect in the very high humic lake is most likely due to light-limitation being the key limitator in that lake, thus …
… role in the winter resistance of many species. Potassium is not found in any organic compounds in the tree, but is present in cell and tissue fluids. A fertilization trial was started in 1978 in Siljansfors Experimental Forest. The plots in the experiment were fertilized with …
en litteratursammanställning om såtid, radavstånd och utsädesmängd
… compensate for a likely yield level reduction caused by the wider spacing. In organic cultivation wider row spacing is an opportunity for developed mechanical weed control, where a lower weed amount can increase the yield. Seed rate should be adapted to the growing location …
… There is a great demand for vegetable-based proteins, especially in the organic production where synthetic amino acids are banned. However, the current production of soy beans is not environmentally sound and that combined with the long transport distances amplifies the need of …
möjligheter och begränsningar
… structure and drainage is a common situation, as well as low soil humidity and organic matter content. There is heavy competition for access to the urban land. Different practices aiming to make surfaces available to urban farmers are applied, for instance roof gardening.
ekologisk gård självförsörjande med drivmedel
… All the regulas crops and the crops for ethanolproduction in the system are organically cultivated. The goal for this study is to compare the final environmental load for the whole system of ethanol production, cultivation and usage of the ethanol in the end. This is assessed by …
en studie på fastigheten Bodsjölandet 1:14 avseende den nedlagda tjärfabriken i Grötingen
… and surface water together with sample analysis of heavy metals and organic pollutants. The result of the analysis shows that very high levels of the contaminants PAH, aromatics and lead are found in both soil and groundwater. The sediment contamination level is high while that …
… gas, which is an energy rich gas that can be used for heat and electricity production. To receive a relatively large amount of gas, the decomposition requires a high moisture content in the waste. Therefore the landfill is dependent on precipitation input, although when the …
… of clothes (and other textiles) in the future. The retting water contains organic matter (BOD = biological oxygen demand) and should not be led out directly into rivers or lakes because the retting products that are still left in the water will be degraded by microorganisms, who …
Rådande trender inom media : En analys av en framstående designtrend
… production company in Stockholm. This essay intends to define this trend as an organic formation of digital material and to identify the key characteristics which form the basis of how to create a production of this nature.
… for laying hens and broiler chickens, and may replace the use of fish meal in organic poultry production. Lead and cadmium are heavy metals which occur in the environment and can be accumulated in mussels. When poultry are exposed to heavy metals, the metals are absorbed in the …
… major alternative to anthelmintic treatment for preventive use, particulary in organic production, is a well adapted grazing system. A good grazing system is also important to reduce the use of anthelmintic drugs and reduce the risk that the parasites develop resistance to the …
