Alfisols

{
  "id": "MLC-T-ENV-001013",
  "term": "Alfisols",
  "field": "Environment",
  "definition": "1. The central concept of Alfisols is that of soils that have an ochric epipedon, an argillic horizon, and moderate to high base saturation and in which water is held at less than 1500 kPa tension during at least 3 months each year when the soils are warm enough for plants to grow. Alfisols may also have a fragipan, a duripan, a kandic horizon, a natric horizon, a petrocalcic horizon, plinthite, or other features, and these features are used in defining the great groups within the order. A very few Alfisols that are very wet during part of the year have an umbric epipedon.\n\n2. An order of soils with a medium-to-high base supply, horizons of clay accumulation, and gray-brown surface horizons.",
  "references": [
    "USDA Natural Resources Conservation Service Soil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys (1999)",
    "NASA Sustainable Development Indicators Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/alfisols/"
}