Multiple Choice Identify the choice that best completes the statement or answers the question. __ 24. What is a soil horizon? a. A layer where all the rocks join to form soil. b. Where the roots grow to long onto the ground. __ 25. What would you add to raise the pH of a soil? a. peat moss b. ag lime c. A layer of soil that differs in color and texture from the layers above or below it. d. Where the clay and silt combine in the grown. c.fertilizer d.sulfur

## Step1<br />For question 24, we need to identify the correct definition of a soil horizon. A soil horizon is a layer of soil that differs in color and texture from the layers above or below it. This is a fundamental concept in soil science.<br /><br />## Step2<br />For question 25, we need to identify the substance that can be added to raise the pH of a soil. The pH of a soil is a measure of its acidity or alkalinity. Adding ag lime (calcium carbonate) to soil can raise its pH, making it less acidic. This is a common practice in agriculture to improve the soil's fertility.