As illustrated by these North Dakota soil samples, most topsoils look similar to the naked eye. But as the test tubes CS (Carrington), LS (Langdon), GS (Galesburg) and FS (Fargo) show, subsoil can look markedly different. The subsoil samples on the far right and third tube from the right contain lots of white particles of lime – an indicator of poorly drained soils. Carrie Snyder / The Forum
Read the article: The dirt on dirt
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