Sökning: "radial growth"

Visar resultat 1 - 5 av 24 uppsatser innehållade orden radial growth.

  1. 1. Forest fertilization does not cause any long-term effects on tree growth or vegetation composition

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Yixian Chen; [2023]
    Nyckelord :density; ground vegetation; height; stem radial growth; legacy nitrogen effect; soil total N and C N ratio; tree;

    Sammanfattning : Forest fertilization is considered one of the most effective management options to improve forest productivity. In Fennoscandia, nitrogen (N) fertilization has been practiced for over 50 years and is normally added in the form of granules of NH4NO3 at least 15 years prior to the final harvest. LÄS MER

  3. 2. Effekten av Årsringsbredd, Sommarvedsandel, Svällning och Växtplats på Utvalda Mekaniska Egenskaper av Contorta (Pinus Contorta)

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Carl Holmquist; [2023]
    Nyckelord :lodgepole pine; latewood; latewood ratio; year ring; growth ring; growth ring width; swelling; bending strength; Contorta; sommarved; sommarvedsandel; årsring; årsringsbredd; medelårsringsbredd; svällning; korrelation; växtplats; hållfasthet; böjhållfasthet; e-modul; elasticitet; densitet;

    Sammanfattning : I dagsläget finns ca 600 000 ha Contortaskog i Sverige varav en stor del planterades runt 70- till 80-talet. Contorta har sitt ursprung i västra USA och Kanada och introducerades i Sverige som en lösning på en förutspådd fibersvacka. LÄS MER

  4. 3. Fungicide tolerance in Phytophthora infestans

    Master-uppsats, SLU/Dept. of Forest Mycology and Plant Pathology

    Författare :Nadja Kvick Nastaj; [2023]
    Nyckelord :Phytophthora infestans; Fungicide tolerance; Fungicide dose;

    Sammanfattning : For the last 180 years, the pathogen P infestans, responsible for the late blight disease, has been a severe problem for farmers. Despite the large efforts and financial investments done in the management of the disease, 15-30% of the potato production is lost to this disease globally each year. LÄS MER

  5. 4. Effect of tree age on masting signal in tree-ring chronologies of beech in southern Sweden

    Master-uppsats, SLU/Southern Swedish Forest Research Centre

    Författare :Jeppe Van Der Lee; [2023]
    Nyckelord :beech; masting; masting signal; proxy; tree-ring chronologies; age; dominance; social position; southern Sweden; climate change; tree growth; regeneration success;

    Sammanfattning : Masting is a synchronous and highly variable production of seeds in tree species. Masting may reflect a reproduction strategy to cope with seed predation. In beech, temperature is the cue controlling annual variability in seeding. Masting behaviour in beech typically begins around the age of 40 years. LÄS MER

  7. 5. Have Radial Velocity Surveys Missed Any Planets?

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

    Författare :Shah Raj; [2021]
    Nyckelord :radial velocity survey; transit method; exoplanet; habitable zone; habitable zone boundaries; HZ; early Mars; recent Venus; stability; instability; chaos; REBOUND; MEGNO; MEGNO maps; Hill sphere; stable systems; unstable systems; Physics and Astronomy;

    Sammanfattning : The project was aimed at numerically assessing exoplanetary systems to distinguish their capabilities of hosting additional planets. The shortcomings of the radial velocity method sometimes causes hindrance in the detection of terrestrial planets. LÄS MER