Sökning: "Crop"

Visar resultat 21 - 25 av 361 avhandlingar innehållade ordet Crop.

  1. 21. Hyperspectral Image Generation, Processing and Analysis

    Författare :Hamed Hamid Muhammed; Ewert Bengtsson; Tommy Lindell; Erkki Oja; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bildanalys; hyperspectral imaging; colour filter mosaics; remote sensing; crop reflectance; surface water quality; disease severity; plant density; linear system of equations; waste water detection; chlorophyll a; suspended paticulate matter; weighted fixed neural networks; weighted incremental neural networks; camera spectrometer; Bildanalys; Image analysis; Bildanalys;

    Sammanfattning : Hyperspectral reflectance data are utilised in many applications, where measured data are processed and converted into physical, chemical and/or biological properties of the target objects and/or processes being studied. It has been proven that crop reflectance data can be used to detect, characterise and quantify disease severity and plant density. LÄS MER

  3. 22. The Technology and Economy of Farm-Scale, High-Solids Anaerobic Digestion of Plant Biomass

    Författare :Mattias Svensson; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; farm-scale; Bioteknik; farmhouse construction; Lantbruksteknik; Biotechnology; agricultural machines; kontroll av utsläpp; Agricultural engineering; Miljöteknik; pollution control; Environmental technology; Lantbruksekonomi; straw bed priming; stratified bed digesters; nitrogen recycling; greenhouse gases; Sweden; Agricultural economics; sequential single-stage fed-batch; ley crops; sustainability; wheat straw; sugar beet tops; crop residues; high-solids; economy; Anaerobic digestion; biogas upgrading;

    Sammanfattning : Anaerobic digestion is a microbially mediated process occurring in nature in the absence of oxygen and other non-carbonaceous electron acceptors. The majority of the carbon of the organic matter degraded in the process is transformed into carbon dioxide and methane. LÄS MER

  4. 23. 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

    Författare :Daniel Larsson; Göteborgs universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; history; Sweden; transition; crop failure; demography; 17th century; 18th century; nuptiality; mortality; fertility; diseases; parish register; Tabellverket; Great Northern War; demographic change; grain prices;

    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

  5. 24. Food security in a changing climate : The role of cropland intensification and land acquisitions across Africa

    Författare :Altaaf Mechiche-Alami; Institutionen för naturgeografi och ekosystemvetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Agriculture; land grabbing; sustainability science; Network Analysis; Earth observation; Crop model;

    Sammanfattning : Food security is one of the world’s greatest challenges. The current food system shows an entanglement across the globe which means that local farmers reliant on subsistence agriculture no longer operate in isolation of larger-scale processes within the global economy or the changing biophysical system of the planet. LÄS MER

  7. 25. Phytostabilization of mine tailings covered with fly ash and sewage sludge

    Författare :Clara Neuschütz; Maria Greger; Lena Kautsky; Anthony R. Dexter; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ammonium; biosolids; cadmium; copper; energy crop; metal and nutrient leakage; nitrate; phosphate; phytoremediation; plant stress response; root exudates; zinc; Plant physiology; Växtfysiologi; växtfysiologi; Plant Physiology;

    Sammanfattning : Establishing plant communities is essential for the restoration of contaminated land. As potential cover materials, fly ash and sewage sludge can prevent formation of acid mine drainage from sulfidic mine waste. LÄS MER