Here are entered works on gardens with raised flat sections on sloped surfaces and hillsides. Works on gardening on patios, decks, and porches, typically using containers, wall planters, hanging baskets, and/or trellises are entered under [Patio gardening.] Works on the method of farming and soil and water conservation practiced on hills and sloped lands by constructing ridges and channels across the slope are entered under [Terracing.]