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Trunk injection or endotherapy also known as vegetative endotherapy, [1] [2] [3] is a method of target-precise application of pesticides, [4] [5] [6] plant resistance activators, [7] or fertilizers [8] into the xylem vascular tissue of a tree with the purpose of protecting the tree from pests, or to inject nutrients to correct for nutrient deficiencies.
The trees are also threatened by diminished seed availability and distribution due to a reduction in native bird species that dispersed the seeds, such as the kererū. Although some non-native birds, such as the common blackbird , are also prolific seed-spreaders, survival of the kahikatea seeds are further threatened by introduced mice and rats.
Fertilizers are materials that can be added to soil or plants, in order to provide nutrients and sustain growth. Typical organic fertilizers include all animal waste including meat processing waste, manure, slurry, and guano; plus plant based fertilizers such as compost; and biosolids. [2] Inorganic "organic fertilizers" include minerals and ash.
Christmas tree cultivation is an agricultural, forestry, and horticultural occupation which involves growing pine, spruce, and fir trees specifically for use as Christmas trees. The first Christmas tree farm was established in 1901, but most consumers continued to obtain their trees from forests until the 1930s and 1940s.
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As a result, ground water is held near the surface. The local ponderosa pines make use the moisture held in the porous soil above the caliche barrier. In addition, scientists have found that the pine seeds from the Lost Forest trees germinated more quickly than other ponderosa pine seeds, suggesting a local adaptation to the arid environment is ...
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