<http://schema.org/description>
"With the advent of uniform narrow canopy training systems on dwarfed trees with a simple branching structure that is enforced by renewal pruning, the \u201Cartistry\u201D of pruning can be phased out in favor of pruning to a few scientifically sound principals. This article describes a prioritized set of pruning rules based upon these principles."^^<http://www.w3.org/2001/XMLSchema#string>
<http://extension.psu.edu/plants/tree-fruit/news/2013/renewal-pruning-for-high-density-apple-plantings>