Agricultural science is largely a race between the emergence of new pests and the emergence of new techniques for their control.

Land is not merely soil, it is a fountain of energy flowing through a circuit of soils, plants and animals.

There is yet no ethic dealing with man's relation to land and to the animals and plants which grow upon it. Land, like Odysseus' slave-girls, is still property. The land-relation is still strictly economic, entailing privileges but not obligations.

Tell me of what plant-birthday a man takes notice, and I shall tell you a good deal about his vocation, his hobbies, his hay fever, and the general level of his ecological education.

To those devoid of imagination a blank place on the map is a useless waste; to others, the most valuable part.

The first law of intelligent tinkering is to save all the parts

Conservation is a state of harmony between men and land.