Richard Hartshorne Quote

Geographers and agricultural economists have become increasingly interested in recent years in studying the associations of crops and livestock in different types of agriculture, in contrast to the separate consideration of individual crops or products.

R. Hartshorne, S.N. Dicken (1935) "A classification of the agricultural regions of Europe and North America on a uniform statistical basis". Annals of the Association of American. Vol 25 (2), p. 99