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Glossary for agroforestry

Compiled and edited by Peter Huxley and Helen van Houten, International Centre for Research in Agroforestry - 1997


    Plant part harvested and the quantity of it. In agriculture, necessarily related to a specified crop or crops or to a group of animals or to an area, and to a period of time. For multipurpose trees, the amount of each specified part harvested. See also production

yield class

    1. The potential or actual yield of a forest, calculated as the total volume of wood produced divided by the age when maximum mean annual increment is achieved. Usually expressed as cubic metres per hectare per year.

    2. A way of expressing the productivity of a particular tree crop on a particular site. It is signifiedby a number that represents the annual production of timber averaged over its economic lifetime or, more correctly, to the age at which the 'mean annual increment' culminates. Thus a crop of 'yield class 10' produces 10 cubic metres of timber per year on average. See also current annual increment, mean annual increment, site class

University of Georgia The Bugwood Network Forestry Images   The Bugwood Network - The University of Georgia
College of Agricultural and Environmental Sciences and Warnell School of Forest Resources
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