How Does Wild Grass Grow Without Any Plant Food?

Fields and hillsides in the wild are covered with dead flowers and plants. As they rot, food found inside them goes into the soil to become fertiliser. The grass uses this food to grow. On farmland, the crops are cut. Their food does not return to the soil, so farmers add fertilisers. Plants create a certain amount of their nutrient needs through the process of photosynthesis. The balance is picked up from the soil by the plant's roots. The most vital nutrients are nitrogen, phosphorous and potassium, which are the three prime constituents of fertiliser. In the wild, withered grass, fallen leaves and the bodies of small animals decompose to form a natural fertiliser. Worm and mite feces form another. Leaves eaten by insects are also turned into fertiliser.