quartz-silicon

Updated: May 3, 2025

Some sand soils, particularly residual sands, which often consist largely of quartz-silicon dioxid are very deficient in potassium; consequently the experiments or demonstrations conducted by the potash syndicate at Southern Pines, North Carolina, show very marked increases from the use of potassium salts on such soil, although the result ought not to be used to encourage the use of such fertilizers on normal soils, which are exceedingly rich in potassium.

Cyril G. (Cyril George) Hopkins - The Farm That Won't Wear Out