It's called "Pe'ah" (corner) and it's in the Hebrew Bible. See http://www.chabad.org/library/article_cdo/aid/961516/jewish/Positive-Commandment-120.htm http://

It's called "Pe'ah" (corner) and it's in the Hebrew Bible. See http://www.chabad.org/library/article_cdo/aid/961516/jewish/Positive-Commandment-120.htm http://www.chabad.org/library/article_cdo/aid/961516/jewish/... It applies to grain harvest and fruit trees and is taken very seriously here in Israel.