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Water flow on pastoral slopes following rainfall transfers sediment and contributes to slope erosion. Pasture cover reduces flow rate allowing more time for water absorption. Trees also influence water flow in ways that complement and enhance the effect of pasture.
Topics: Erosion Control; Farms; Poplar Information; Trees for the Farm;
Document Type: Research Briefs;
This research brief reports on the performance of poplar clones in a trial established in 1990 by Environment Canterbury on the banks of the Rakaia River. The trial was to compare the performance of five New Zealand-bred poplar clones, with the ‘Veronese’ (Populus deltoides × P. nigra) poplar clone.
Topics: Poplar Information; Trees for the Farm; Timber;
Document Type: Research Briefs;
What is pollarding? Pollarding is reducing a tree to a stump by removing all branches. For poplars on farms the stump is left at 2 m height so animals cannot eat off the new shoots.
Topics: Cultivation; Poplar Information; Trees for the Farm;
Document Type: Research Briefs;
A single deposit of fertiliser, either N (80g urea), P (180g superphosphate) or both was supplied at 30 cm upslope of the pole and at 15 cm depth to ‘Veronese’ poplar trees on sloping pastoral land two months after the trees were planted as poles.
Topics: Cultivation; Nutrition and Fertiliser; Poplar Information; Trees for the Farm;
Document Type: Research Briefs;
Water flow on pastoral slopes following rainfall transfers sediment and contributes to slope erosion. Pasture cover reduces flow rate allowing more time for water absorption. Trees also influence water flow in ways that complement and enhance the effect of pasture.
Topics: Erosion Control; Farms; Poplar Information; Trees for the Farm;
Document Type: Research Briefs;
A range of willow (Salix) and poplar (Populus) clones were used in the study. This information is important for river engineers, land managers and landowners seeking to match planting material to situation.
Topics: Erosion Control; Rivers; Root Systems; Poplar Information; Willow Information;
Document Type: Research Briefs;
We measured and modelled pasture production over a 10-month period under poplar trees aged either 11 or 22 years (TP) and in open pasture (OP), to determine the effect of spaced conservation trees on pasture production.
Topics: Fodder; Cultivation; Poplar Information; Trees for the Farm;
Document Type: Research Briefs;
Poplar is widely planted internationally as a forestry and agroforestry species. The poplar cultivar ‘Kawa’ has been planted in Northland as an agroforestry tree. ‘Kawa’ has a higher wood density than most other poplar cultivars, with a straight stem.
Topics: Poplar Information; Trees for the Farm; Timber;
Document Type: Research Briefs;
Trunk diameter data from two wide spaced poplar trials planted in rows, with within row spacing of 10 m, at 20 m apart up a slope are used to provide insights into how slope position affects poplar growth.
Topics: Erosion Control; Root Systems; Cultivation; Poplar Information; Trees for the Farm;
Document Type: Research Briefs;
Poplar (Populus deltoides × nigra) Trees were grown from 3 m-long poles on pastoral hill slopes in three different soil types, pumice, sandy loam and clay loam, differing in their bulk density.
Topics: Erosion Control; Root Systems; Cultivation; Poplar Information;
Document Type: Research Briefs;
Natural water catchments extend from mountains to sea, collecting water on the way. The erosive power of flowing water increases during periods of high water runoff, e.g. rainstorms. The heavier the rainfall the greater the water volumes and velocity the greater the erosive forces.
Topics: Erosion Control; Farms; Rivers; Willow Information;
Document Type: Research Briefs;
Poplar and willow provide fodder of sufficient quality and quantity to warrant using then as supplements for feeding to livestock during summer droughts. In addition to the feed quality, the tannins and phenolic glucosides present in the leaves provide pharmaceuticals benefits to stock.
Topics: Fodder; Poplar Information; Trees for the Farm; Willow Information;
Document Type: Research Briefs;
Farm milled poplar provides valuable wood products for both on-farm and off-farm use e.g. treated posts, battens and timber. On-farm, the timber was used for railings and gates in both cattle and sheep yards.
Topics: Poplar Information; Trees for the Farm; Timber; Farm milling & uses;
Document Type: Research Briefs;
Two wide-spaced trials were planted on each of two farms in Tararua District to evaluate the effect of sap-sucking Tuberolachnus salignus, giant willow aphid (GWA), on ‘Tangoio’ tree willow growth
Topics: Pests; Giant Willow Aphid Tuberolachnus salignus ; Willow Information;
Document Type: Research Briefs;
This study investigated the effects of poplar tree spacing on soil properties (infiltration rate, bulk density, soil moisture content and soil organic matter content) in two Nelder tree plots, with different soil types.
Topics: Cultivation; Poplar Information; Trees for the Farm;
Document Type: Research Briefs;
Willow trees planted for soil conservation confer beneficial effects on the soil through canopy litter, roots and shade.
Topics: Erosion Control; Farms; Trees for the Farm; Willow Information;
Document Type: Research Briefs;
We evaluated the response of Populus and Salix trees to elevated carbon dioxide (CO2) and temperature, and the interaction of these factors with drought, in a controlled environment.
Topics: Poplar Information; Trees for the Farm; Willow Information;
Document Type: Research Briefs;
Large or old poplar trees considered a safety risk can be poisoned, killed and left standing, using an appropriate herbicide applied to the conducting tissue in the trunk.
Topics: Poplar Information;
Document Type: Research Briefs;
This study investigated farmers’ perspectives and experiences of poplar and willow trees planted on their farms for erosion reduction.
Topics: Erosion Control; Poplar Information; Trees for the Farm; Willow Information;
Document Type: Research Briefs;