In gardening, an overhead structure of evenly spaced slats of wood or other materials used to create shade. The soil around over fertilized plants can be leached clean by large quantities of fresh water used to 'wash' the soil. Areas of extremely high rainfall sometimes lose the nutrients from the soil by natural leaching. A rich soil composed of clay, sand, and organic matter. Organic matter, excreted by animals, which is used as a soil amendment and fertilizer.
Green manures are plant cover crops which are tilled into the soil.
If the plants you are growing require specific 'trace elements' and they are not available in the soil, they must be added. Usually this is a coarse organic matter, such as leaves, clippings or bark, but plastic sheeting and other commercial products can also be used. Any plant that occurs and grows naturally in a specific region or locality. The idea is to create the effect that the plants grew in that space without man's help, such as you would find wild flowers growing. The part of a stem from which a leaf or new branch starts to grow.