Sökning: "AGRICULTURAL SCIENCES"

Visar resultat 11 - 15 av 1912 avhandlingar innehållade orden AGRICULTURAL SCIENCES.

  1. 11. Recycling Filter Substrates used for Phosphorus Removal from Wastewater as Soil Amendments

    Författare :Victor Cucarella Cabañas; Gunno Renman; Greg Morrison; KTH; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Compact filter; Filtra P; Phosphorus recycling; Polonite; Soil amendment; Sorption isotherms; Soil science; Markvetenskap; Solution chemistry; Lösningskemi; Agricultural engineering; Jordbruksteknik; Water engineering; Vattenteknik; Environmental chemistry; Miljökemi;

    Sammanfattning : This thesis studied the viability of recycling filter substrates as soil amendments after being used in on-site systems for phosphorus (P) removal from wastewater. Focus was put on the materials Filtra P and Polonite, which are commercial products used in compact filters in Sweden. LÄS MER

  3. 12. Felling Forests from Afar: Quantifying Deforestation Driven by Agricultural Expansion and International Trade

    Författare :Florence Pendrill; Chalmers tekniska högskola; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Forest transitions; Land cover; Carbon footprints; Agriculture; Forestry; Carbon emissions; Land use; International trade; Deforestation;

    Sammanfattning : Deforestation is a major source of human-caused greenhouse gas emissions and the largest threat to terrestrial biodiversity. Most forest loss is due to the expansion of agricultural land use increasingly driven by international demand for food, fuel and fibre. LÄS MER

  4. 13. Harvesting from land and sea : Social relationships, trade networks, and spatial connectivity in changing social-ecological systems

    Författare :Blanca González García-Mon; Maja Schlüter; Örjan Bodin; Emilie Lindkvist; Bonnie McCay; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; social-ecological systems; food; trade; networks; embeddedness; supply chain; diversification; mobility; fisheries; agriculture; mixed-methods; vetenskap om hållbar utveckling; Sustainability Science;

    Sammanfattning : In the era of global change, the connectivity of aquatic and terrestrial food production systems across spatial scales is increasing. At the same time, diverse actors that participate in food systems, from production to consumption, face the need to adapt their daily activities to an increasingly changing context. LÄS MER

  5. 14. Jordbrukspolitiska stödformer : en studie av SR-, A- och B-stödens lokala effekter 1961-1981

    Författare :Rolf S. Johnsson; Umeå universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Swedish agriculture; structural rationalization; government support; government subsidy; special rationalization SR ; evaluation; agricultural policy;

    Sammanfattning : The aim of this study has been to analyse the effects of state subsidies within agriculture. The goal of these policies was to build up long-term sound and profitable farms by means of both general and selective support measures. LÄS MER

  7. 15. Ethological control of the Mediterranean fruit fly Ceratitis capitata (Wied.)

    Författare :Ilich Figueroa; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The Mediterranean fruit fly Ceratitis capitata (Diptera: Tephritidae) is a serious threat for the Bolivian fruit sector. Despite its importance, few efforts have focussed on the development of alternative techniques to broad spectrum pesticides, especially those that suppress the pest using odour-mediated behavior manipulation. LÄS MER