Shale Regolith Produces Coarse-Textured Soil and Limits Soil Development

Q68: Ultisols generally lack _.<br>A) clay<br>B) iron<br>C) humus<br>D)

Q69: Three-quarters of the soil's metabolic activity is

Q70: The process of eluviation in soils is

Q71: A dark color is a sure indication

Q72: Soils are considered part of the _.<br>A)

Q74: This soil order is developed from volcanic

Q75: The measure of acidity/alkalinity in soils is

Q76: Seeds germinate mainly in the _ horizon.<br>A)

Q77: A soil with a large percentage of

Q78: Acid soils deprive plants of nutrients by