Search for dissertations about: "Fertilizers"

Showing result 1 - 5 of 23 swedish dissertations containing the word Fertilizers.

  1. 1. Ecostrategies in theory and practice : Farmer's perspectives on water, nutrients and sustainability in low-resource agriculture in the dry zone of Sri Lanka

    University dissertation from Linköping : Linköpings universitet

    Author : Klas Sandell; Karlstads universitet.; Linköpings universitet.; Linköpings universitet.; [1988]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Kulturgeografi; Human Geography; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN; Attitudes towards nature; Alternative development; Carrying capacity; Development strategies; Development theory; Diffusion; Dry zone of Sri Lanka; Ecodevelopment; Ethnoperspective; Fertilizers; Green revolution; Human ecology; Human geography; Low-resource agriculture; Small-scale farming; Sustainable development; Village irrigation.;

    Abstract : PROBLEMThe need for a sustainable man - nature relationship has long been a neglected aspect of development theory. The increasing awareness of this negligence has led to a search for development strategies alternative to conventional industrial growth. READ MORE

  2. 2. Phosphorus recycling from wastewater to agriculture using reactive filter media

    University dissertation from Stockholm : KTH

    Author : Victor Cucarella Cabañas; KTH.; [2007]
    Keywords : Filtra P; phosphorus; Polonite; recycling; sorption; wollastonite; INTERDISCIPLINARY RESEARCH AREAS Water in nature and society; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN Vatten i natur och samhälle;

    Abstract : This thesis focused on testing the suitability of reactive filter media used for phosphorus (P) removal from wastewater as fertilizers, thus recycling P to agriculture. The work compared the P sorption capacity of several materials in order to assess their suitability as a source of P for plants. READ MORE

  3. 3. Traditional lowland rice agriculture in Sri Lanka : Nitrogen cycling and options for biofertilizers

    University dissertation from Linköping : Linköpings universitet

    Author : Ola Palm; Linköpings universitet.; Linköpings universitet.; [1988]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Abstract : The aim of this thesis has been: to study the dynamics of soil organic-matter, with regard to nitrogen in a traditional lowland-rice agricultural system; to consider options for and nitrogen cycling of biofertilizers, especially the green-manure legume Sesbania sesban; to discuss fertilizer sources and management constraints as parts of a sustainable agricultural development; and to discnss the methodological problems of controlled experiments vs. investigations in farmer's fields. READ MORE

  4. 4. Evaluation of Modern Irrigation Techniques with Brackish Water

    University dissertation from Lund University

    Author : Tarek Selim Aboulila; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2012]
    Keywords : Soil Salinity; Soil water; Drip irrigation; HYDRUS-2D 3D; El-Salam Canal; Egypt.; TEKNIKVETENSKAP; TECHNOLOGY;

    Abstract : Modern irrigation techniques are becoming increasingly important in water-scarce countries especially in arid and semiarid regions. Higher crop production and better water use efficiency are usually achieved by drip irrigation as compared to other irrigation methods. READ MORE

  5. 5. Phosphorus removal in reactive filter materials : factors affecting the sorption capacity

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Charlotte Nilsson; KTH.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Phosphorus is an essential component in all living organisms; it is one of the components of the DNA and the key element in the energy supplying molecule adenosine triphosphate (ATP). Throughout the history, humans have been recycling phosphorus to agriculture; thereby increasing the yield, examples of this includes the burning of plants and the use of manure. READ MORE