text: The mnemonic "CLORPT" summarizes Hans Jenny's state equation for these materials' formation.
full_question: The mnemonic "CLORPT" summarizes Hans Jenny's state equation for these materials' formation. Ammonium acetate extraction is a way to measure the cation exchange capacity of these materials. The composition of these materials distinguishes edaphic communities. Their USDA classification has 12 orders, of which inceptisols and entisols are the most common. If their effective stress is near zero, these materials may undergo (*) liquefaction, as when they are saturated. They form from a parent material through the process of pedogenesis. The profiles of these materials are divided into layers called horizons, and they contain decayed organic matter called humus as well as sand and silt. For 10 points, name these mixtures of weathered rock that support plant life.
first_sentence: The mnemonic "CLORPT" summarizes Hans Jenny's state equation for these materials' formation.
raw_answer: soils