Sökning: "top soil removal"

Hittade 4 uppsatser innehållade orden top soil removal.

  1. 1. Effect of soil tillage system and straw retention on soil aggregation and water capacity

    Kandidat-uppsats, SLU/Dept. of Biosystems and Technology (from 130101)

    Författare :Emma Lindqvist; [2015]
    Nyckelord :soil; tillage; structure; aggregation; straw; water capacity;

    Sammanfattning : Arable land supplies food and it is therefore important to develop the production and land-use in a sustainable way. To grow crops for food should be both economical and environmentally sustainable and the soil structure and quality should be taken in consideration when cultivating our land. LÄS MER

  3. 2. Långsiktig förändring av fosforhalt och skördenivåer för jordar med höga P-AL-tal : en analys av försöksserien "Exploatering av höga fosfortillstånd"

    Kandidat-uppsats, SLU/Dept. of Soil and Environment

    Författare :Sabina Braun; [2014]
    Nyckelord :fosfor; P-AL; exploatering av höga P-AL-tal;

    Sammanfattning : The field trial Exploatering av höga P-AL-tal (Exploiting P in heavily P dressed soils) started in 1982-1983 and included seventeen study sites placed across Sweden. Each site included three treatments, one unfertilized control (A), one aiming at replenishment of harvest removal, i.e. LÄS MER

  4. 3. Restoration of a Rich Fen by Top Soil Removal : Temporal and Spatial Responses among Vascular Plants, Bryophytes and Land Snails during 15 years

    Magister-uppsats, Institutionen för biologisk grundutbildning

    Författare :Liselott Evasdotter; [2011]
    Nyckelord :rich fen; restoration; top soil removal; succession; land snails;

    Sammanfattning : Rich fens are calcareous and nutrient poor wetlands with a rich flora of orchids, sedges and mosses. As many as one hundred plant species are rich fen specialists. Many wetlands have been drained historically, and transformed to agricultural land or production forests. Today rich fens cover only 2-3% of the total mire area in Sweden. LÄS MER

  5. 4. Spårelement i Sveriges jordbruksmark : flöden, trender och fältbalanser

    Magister-uppsats, SLU/Dept. of Soil and Environment

    Författare :Per Knutson; [2011]
    Nyckelord :fältbalanser; balansberäkningar; spårelement; tungmetaller; tillförsel; bortförsel; förändringstakt;

    Sammanfattning : Field balances based on supply and removal of trace elements from the topsoil have been calculatedfor farms specialized in crop, dairy and pig production in Sweden. Today's field balances have beencompared with the field balances of 1990 in order to examine if, and then how, the situation haschanged. LÄS MER