منابع مشابه
Isolating a Leaf in Rooted Trees via Random Cuttings
We consider a recursive procedure for destroying rooted trees and isolating a leaf by removing a random edge and keeping the subtree, which does not contain the original root. For two tree families, the simply generated tree families and increasing tree families, we study here the number of random cuts that are necessary to isolate a leaf. We can show limiting distribution results of this param...
متن کاملEffects of Pre-Planting Soaking on Growth and Survival of Black Willow Cuttings
Black willow ( Salix nigra ) uses periodic flood events for dispersal of vegetative propagules, subjecting them to periods of soaking before their deposition along the streambank. It was hypothesized that this life history trait results in optimal conditions for willow growth and survival. To test this hypothesis, a greenhouse experiment was conducted using 1.2-m-long black willow cuttings (pos...
متن کاملEffects of soil conditions on survival and growth of black willow cuttings.
Current streambank restoration efforts focus on providing bank stability, enhancing water quality, and improving woody habitat using native vegetation rather than traditional engineering techniques. However, in most cases harsh site conditions limit restoration success. A two-year field study was conducted at Twentymile Creek, in northern Mississippi, investigating edaphic factors governing the...
متن کاملPartial flooding enhances aeration in adventitious roots of black willow (Salix nigra) cuttings.
Black willow (Salix nigra) cuttings are used for streambank stabilization where they are subjected to a range of soil moisture conditions including flooding. Flooding has been shown to adversely impact cutting performance, and improved understanding of natural adaptations to flooding might suggest handling and planting techniques to enhance success. However, data assessing the root aeration in ...
متن کاملEfficiency of Seedlings and Rooted Cuttings for Testing and Selection in Pinus taeda
Predicted genetic gains of polymix, cloned polymix, full-sib and cloned full-sib testing and selection options for a breeding population were estimated for Pinus taeda L. Heritabilities for volume from the clonal testing were considerably greater than the heritabilities from the seedling testing. Cloned options had higher expected genetic gains than seedling options, even after adjusting for th...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1969
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1969.tb06508.x