Checked content



English: Map of yam production (average percentage of land used for its production times average yield in each grid cell) across the world compiled by the University of Minnesota Institute on the Environment with data from: Monfreda, C., N. Ramankutty, and J.A. Foley. 2008. Farming the planet: 2. Geographic distribution of crop areas, yields, physiological types, and net primary production in the year 2000. Global Biogeochemical Cycles 22: GB1022
Date 3 March 2003
Source Own work
Author AndrewMT


I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
This file is licensed under the Creative Commons Attribution 3.0 Unported license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).

The following pages on Schools Wikipedia link to this image (list may be incomplete):

More information

Schools Wikipedia has been carefully checked to give you the best learning experience. SOS Children helps those who have nothing and no one, giving them back the famly they have lost and bringing them the very best opportunities for a happy, healthy future. Sponsoring a child is a great way to help children who need your support.