Soils in Malaysia from sedimentary rocks are important for farming. The researchers studied these soils in different areas to see how they vary. They found that forests have the most nutrients, followed by rubber plantations and then oil palm plantations. The type of soil also changes with altitude, with different properties at different heights. The researchers also looked at soil variability in an oil palm plantation. Overall, they found that different factors like weathering and soil use affect soil quality, and a good strategy is needed to keep nutrients in the soil for sustainable farming.