Sandy soil consists of large particles that allow for good drainage but can dry out plants. Clay soil is made of very fine particles that make it difficult to work with due to poor drainage and risk of waterlogging. Loamy soil balances sand, silt and clay for good texture, water retention and drainage. Chalky soil is alkaline with many stones and prone to dryness. Peaty soil is rich in organic matter but low in nutrients unless well fertilized and drained. The subsoil below the topsoil may not contain nutrients for plants.