Although it is commonly believed that plants require soil to grow, most plants do not. In fact, it is not the soil itself that causes a plant to grow, but rather the nutrients found in the soil.
For a plant to grow, a few basic things are required. Plants need nutrients, support, protection against the elements, moisture and oxygen for the roots. These things are usually found in soil, but plants can grow properly in other ways as well. In fact, most plants grow well in hydroponics systems, growing systems that use only nutrient-rich water, when the necessary support and nutrients are provided.Learn More
According to the Department of Primary Industries, the presence of worms improves the quality of the soil and leads to better plant growth. As worms are decomposers, the dead organic material they eat in an area becomes concentrated within their digestive tracts, and they release nutrient-rich casts into the soil.Full Answer >
Plants provide food to people and animals, regulate the water cycle, create oxygen and provide a habitat for other species. Without plants, life on Earth would not be sustainable for most species, including humans.Full Answer >
Plants are necessary because they are a primary food source and provide the oxygen that is vital to animals' and humans' existence. A majority of the calories that people consume comes from plants, and most meat comes from animals that eat plants. Plants are at the bottom of the food chain, and animals could not survive without them. Plants also release the oxygen that humans and animals breathe.Full Answer >
Plants are green because of a pigment called chlorophyll. Chlorophyll absorbs all colors of visible light except for green, which is reflected. Thus, the reflection of the green part of visible light is what causes plants to look green.Full Answer >