Conservation practices are based on a need to retain the best features of soils, plants, and animals. These are the raw materials of commerce. Commercialization has accelerated until most land areas are now exploited.
Iowa Science Teachers' Journal
© Copyright 1969 by the Iowa Academy of Science
Stempel, M. E.
"Conservation and the Biology Teacher,"
Iowa Science Teachers Journal: Vol. 7
, Article 5.
Available at: https://scholarworks.uni.edu/istj/vol7/iss1/5