== Eksterne henvisninger ==
*[http://www.agrophys.ru/ Agrophysical Research Institute of the Russian Academy of Agricultural Sciences]
*[https://web.archive.org/web/20060217193937/http://www.ipan.lublin.pl/en/about_us/index.html Bohdan Dobrzański Institute of Agrophysics, Polish Academy of Sciences in Lublin]
*[https://web.archive.org/web/20060108064756/http://pmalabs.tf.czu.cz/ Free Association of PMA Labs, Czech University of Agriculture, Prague]
*[https://web.archive.org/web/20060329085420/http://www.ipan.lublin.pl/en/editorial_activities/international_agrophysics/search.html?stan=form International Agrophysics]
*[https://web.archive.org/web/20120920005220/http://www.international-agrophysics.org/en/general_information.html?link=general International Agrophysics - quarterly journal focused on applications of physics in environmental and agricultural sciences]
*[http://www.pta.lublin.pl/english.htm Polish Society of Agrophysics]
*[https://web.archive.org/web/20050914193229/http://www.nal.usda.gov/afsic/AFSIC_pubs/srb9902.htm Sustainable Agriculture: Definitions and Terms]
Erhvervsliv Jordbrug