Avancerad sökning
Visar resultat 1 - 5 av 11 avhandlingar som matchar ovanstående sökkriterier.
1. Den dolda transitionen : om ett demografiskt brytningsskede i det tidiga 1700-talets Sverige : The Hidden Transition. A Demographic Long-term Change in Early 18th Century Sweden
Sammanfattning : Historical agricultural and economical research indicates that the extensive changes in society that occurred in Sweden (within agriculture, trade, landownership and production) at the end of Sweden's Time of Greatness in 1720 should have noticeably affected the living conditions of the population. A systematic study that compares the 17th and 18th century's demography has however still not been made. LÄS MER
2. Anaerobic digestion of crop and waste biomass: Impact of feedstock characteristics on process performance
Sammanfattning : Anaerobic digestion provides an array of positive environmental benefits such as reducing greenhouse gas emissions, replacing mineral fertilizers, producing renewable energy and treating waste. However, pitfalls in anaerobic digestion such as poor methane yields, process instability, process failure and regional shortages of feedstock have limited the full exploitation of the anaerobic digestion process. LÄS MER
3. From fields to landscapes : effects of agricultural land use and landscape heterogeneity on farmland birds
Sammanfattning : Farmland biodiversity has declined because of agricultural intensification. Agri-environment schemes (AESs) seem to have limited effect in stopping and reversing declines. LÄS MER
4. On-farm agrohydrological analysis of the Sahelian yield crisis : rainfall partitioning, soil nutrients and water use efficiency of pearl millet
Sammanfattning : Sub-Saharan Africa is presently experiencing a steadily aggravated food security crisis. This crisis is a result of a rapidly growing population combined with insignificant yield increases of the major cereal crops maize, millet and sorghum, during the last decades. LÄS MER
5. Volatility, integration and grain banks : studies in harvests, rye prices and institutional development of the parish magasins in Sweden in the 18th and 19th centuries
Sammanfattning : This study is the first to focus primarily on the Swedish parish magasins, the country’s most widespread credit institution in the last half of the 18th, and the first part of the 19th, century. During the Early Modern Period, grain price volatility was a matter of great concern. LÄS MER
