Spring 2009: multiple choice: circle the best answer for each question; 2 pts. each, a soil property that cannot be changed by management: 1: the two major minerals that weather by hydrolysis to form clay minerals are (circle two)-, muscovite b. feldspar. Fill-in: write the best term or response in the blank; 1 pt each. 10__________________ most common type of structure in a horizons. 11__________________ bulk density of a soil that has 50% pore space. 12__________________ most common rock found around the athens area. 13__________________ term for a land area that drains surface water to a single outlet. 14__________________ process of soil formation responsible for formation of bt horizons. 15__________________ movement of rainwater into the surface of the soil. 16__________________ symbol for o horizon with partially decomposed plant remains. 17__________________ symbol for the master horizon that is illuvial. 18__________________ continent that collided with n. american 300 million years ago.