Essays about: "nurse trees"

Found 3 essays containing the words nurse trees.

  1. 1. Hybrid walnut : results from a five year field trial in southwest Sweden 2015-2020

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Stefan Juravle; [2020]
    Keywords : hybrid walnut; NG23; NG38; fertilization; fork; future crop tree; nurse trees;

    Abstract : A crossbreeding between american black walnut and Persian walnut lead to the development of a hybrid walnut (Juglans x intermedia). In a field trial from southwest Sweden have been tested the impact of different levels of nurse trees, fertilization and weed control on the early growth of two hybrid walnut varieties: NG23 and NG38. READ MORE

  2. 2. Effects of African elephant (Loxodonta africana) on forage opportunities for local ungulates through pushing over trees

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Janson Wong; [2013]
    Keywords : African elephants; cascade effects; forage; treefalls; fallen trees; common duiker; kudu; black rhinoceros;

    Abstract : African elephants (Loxodonta africana) are ecosystem engineers that have the ability to alter the physical structure of the landscape it inhabits and subsequently affect the livelihood of other local species. This study evaluated the landscape and plant level impacts by elephants by means of fallen trees in the Karoo ecosystem. READ MORE

  3. 3. Spruce quality in mixed stands

    University essay from SLU/Southern Swedish Forest Research Centre

    Author : Izabela Witkowska; [2008]
    Keywords : spruce; wood quality; mixed stands; competition; sheltered stands;

    Abstract : Due to changes in Swedish forestry there is an increasing interest in growing mixed stands. Earlier studies indicate that shelterwood systems combined with dense natural regeneration of spruce resulted in reduced branchiness and improved graded quality of spruce. READ MORE