> as lemmas

1921 Proc. 41st Ann. Meeting Soc. Promotion Agric. Sci., 1920 (U.S.) 118 A great deal of fundamental work has been done in Russia. It has been concerned..with the working out of the principles and the formulation of the laws of soil development.

1972 J. G. Cruickshank Soil Geogr. ii. 57 The origin of parent materials is not significant for soil development except as an indication of the soil properties that may be expected.