The type of land and the shape of the land affect the nutrients in the soil. Different types of land have different amounts of organic matter, nitrogen, phosphorus, and potassium in the soil. The altitude and slope of the land also play a role in the amount of these nutrients. For example, higher altitudes have more organic matter and nitrogen, while phosphorus levels peak at a certain altitude and then decrease. Slope direction also matters, with shady slopes having more nutrients than sunny slopes. The combination of land type and topography can impact the amount of organic matter in the soil, with grasslands having more at higher altitudes and shadier slopes.