Search for dissertations about: "soil productivity"

Showing result 1 - 5 of 70 swedish dissertations containing the words soil productivity.

  1. 1. Soil salinity as a driver of microbial community structure and functioning

    University dissertation from Lund University, Faculty of Science, Centre for Environmental and Climate Research (CEC)

    Author : Kristin Rath; [2017-12]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Soil salinization; Soil Microbiology; soil microbial community; Bacteria; Aerobic; Fungi; Drying-rewetting; Microbial growth; Microbial biomass; Soil respiration; salinity tolerance; Saline soils; Salinity gradient;

    Abstract : Soil salinization is a pressing agricultural problem in many areas of the world, particularly in areas heavily reliant on irrigation agriculture. While the negative effects of salinity on crop plants have been widely studied, its effects on soil microorganisms have received less attention, and the impact of soil salinity on both microbial community structure and functioning is not well understood. READ MORE

  2. 2. Soil Degradation of Raised-beds on Orchards in the Mekong Delta Field and Laboratory Methods

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Quang Pham Van; Per-Erik Jansson; Khoa Le Van; Ingmar Messing; [2013]
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; citrus orchards; nutrient; soil fertility; soil strength; soil degradation; alluvial soil; Mekong delta;

    Abstract : Soil degradation is a complex process which may occur anywhere and at any time. It directly affects the physical, chemical and biological processes within the soil profile. Soil degradation can either be as a result of natural hazards or due to manmade actions, such as mismanagement on cropping patterns, soil preparation and cultivation practices. READ MORE

  3. 3. Tillage effects on soil respiration in Swedish arable soils

    University dissertation from ; Dept. of Soil and Environment, Swedish University of Agricultural Sciences

    Author : Veera Kainiemi; Sveriges lantbruksuniversitet.; [2014]
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : The amount of carbon (C) present in soil is greater than the sum of C present in terrestrial vegetation and the atmosphere combined. Small changes in soils can therefore affect atmospheric CO₂ levels and ultimately the global climate. Soil C is also one of the main soil properties involved in several soil functions critical for soil productivity. READ MORE

  4. 4. Ectomycorrhizal Fungal Mycelial Dynamics and its Role in Forest Soil Carbon Cycling

    University dissertation from ; Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences

    Author : Andreas Hagenbo; Sveriges lantbruksuniversitet.; [2017]
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Most boreal tree species rely on root-associated ectomycorrhizal fungi for nutrient acquisition, in exchange the trees allocate part of their photosynthetically fixed carbon (C) to these fungi. This has a feedback on soil C dynamics as mycorrhizal fungi are important in regulating soil C cycling and storage. READ MORE

  5. 5. Compost and fertilizer - alternatives or complementary? : management feasibility and long-term effects on soil fertility in an Ethiopian village

    University dissertation from ; Department of Soil and Environment, Swedish University of Agricultural Sciences

    Author : Workneh Bedada Chala; Sveriges lantbruksuniversitet.; [2015]
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Abstract : Decline in soil fertility due to nutrient depletion is a concern for low-input crop production in the highlands of Ethiopia. Fertilizer addition is insufficient due to infrastructural and socioeconomic constraints. READ MORE