Sökning: "Agriculture"

Visar resultat 16 - 20 av 1387 avhandlingar innehållade ordet Agriculture.

1. 16. Chlorine Cycling in Terrestrial Environments

   Författare :Malin Montelius; David Bastviken; Teresia Svensson; Katarina Abrahamsson; Linköpings universitet; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Chloride; organic chlorine; chlorination; dechlorination; 36Cl; risk assessment modelling; Klorid; organiskt klor; klorering; deklorering; klor-36; riskmodellering;

   Sammanfattning : Chlorinated organic compounds (Clorg) are produced naturally in soil. Formation and degradation of Clorg affect the chlorine (Cl) cycling in terrestrial environments and chlorine can be retained or released from soil. LÄS MER

3. 17. Soil microbial diversity in agriculture : Responses to land-use and extreme weather events

   Författare :Katja Kozjek; Biodiversitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; agriculture; drought; soil microbial communities; taxonomic diversity; functional diversity;

   Sammanfattning : Land-use intensification of agricultural soils and increased occurrence and intensity of extreme weather events like drought periods are two of the main threats responsible for soil biodiversity declines. These changes in soil biodiversity can alter ecosystem functions performed especially by soil microbial communities that could further contribute to those threats. LÄS MER

4. 18. Effects of Agriculture on Abundance, Genetic Diversity and Fitness in the Common Frog, Rana temporaria

   Författare :Markus Johansson; Anssi Laurila; Juha Merilä; Craig R. Primmer; Michael W. Bruford; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; agriculture; agrochemicals; amphibians; effective population size; genetic diversity; genetic structure; hierarchical sampling; microsatellites; Rana temporaria; Biologi; Biology; Biologi;

   Sammanfattning : The aims of this thesis were to evaluate the effects of agriculture on amphibians in terms of (i) population genetic consequences of agriculture-induced spatial changes of the landscape and (ii) local adaptation and tolerance to frequently used agrochemicals. The study was performed using the common frog Rana temporaria as a model. LÄS MER

5. 19. Bondens val: System, samspel och stödjande strukturer under moderniseringsprocessen i norra Thailand

   Författare :Lena Örnberg; Lunds universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; agriculture; farmers; contract farming; institutions; Thailand; organisations; agriculture-led development;

   Sammanfattning : There is a variety of options in the Thai countryside today, especially in an area like San Sai in Northern Thailand, situated in the vicinity of a city. What are the arguments for staying within the agricultural sector? As the economy grows, the demand for new products is increasing, creating opportunities for those who want to invest in agriculture. LÄS MER

7. 20. Inget landskap är en ö : dialektik och praktik i öländska landskap

   Författare :Katarina Saltzman; Avdelningen för konsthistoria och visuella studier; []
   Nyckelord :HUMANIORA; HUMANITIES; Cultural anthropology; utopianism; world heritage; land-use conflicts; tourism; agriculture; sustainability; countryside; values; nature culture; processuality; Landscape; dialectics; ethnology; Kulturantropologi; etnologi; History of agriculture; Agrarhistoria;

   Sammanfattning : The complex character of rural landscapes implies a constant interaction between mind and matter as well as between nature and society. In landscapes, the established division of reality into nature and culture appears all but natural. This book points to the possibilities of regarding landscape as a dialectical process. LÄS MER