piaget conservation

King ( 1978) and Koppelman dkk., ( 1996) [is] such as those which cited [by] Sa’Ad ( 2002) mentioning that system of agroforestry can be grouped according to function and structure, as environmental adaptation and agroekologi, nature of economic sosio, cultural aspect and habit ( custom), and way of its management.

System Implementation of Agroforestry