The study looked at how different types of soil affect the growth of rice plants and the movement of water through the soil. They used special containers called lysimeters to simulate rice fields with sandy loam, clay loam, and clay soil. In the first year, clay loam needed the most water for irrigation, while sandy loam needed the least. In the second year, sandy loam needed the most water. Water moved through sandy loam soil the most in both years. The roots of the rice plants grew the most in clay soil. The researchers found that the amount of water moving through the soil was influenced by both the type of soil and the growth of the rice roots.