After severe dust storms in the 1930s, practices were put in place to reduce soil erosion. Which practice best helped to reduce soil erosion?

Farmers were paid to practice soil-conserving techniques like crop rotation and terracing

Explanation:

read about it here: https://www.pbs.org/wgbh/americanexperience/features/dust-bowl-surviving-dust-bowl/

keep the soil wet

Explanation: if the song wet it will not cause as much dust storms

there is none because earth is stationary and flat.