Plants obtain nutrients from the soil through their root system. The roots of the plants absorb water and essential minerals from the soil through a process called nutrient uptake. This process involves the roots taking in nutrients such as nitrogen, phosphorus, and potassium, along with other micronutrients required for their growth and development. The absorbed nutrients are then transported through the plant's vascular system to various parts of the plant where they are utilized for functions like photosynthesis, growth, and reproduction.