Soil

aeration = the process of making it possible for air to become mixed with soil, water, etc.

silt = sand, mud, etc. that is carried by flowing water and is left at the mouth of a river soil structure = the way individual particles of sand, silt, and clay are assembled soil texture = (such as loam, sandy loam or clay) refers to the proportion of sand, silt and clay sized particles that make up the mineral fraction of the soil dense = heavy in relation to its size parent material = the disintegrated rock material usually unconsolidated and unchanged or only slightly changed that underlies and generally gives rise to the true soil by the natural process of soil development nutrient = a substance that is needed to keep a living thing alive and to help it to grow plant nutrients: the three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK. Other important nutrients are calcium (Ca), magnesium (Mg) and sulfur (S).