Site Information

The Novelty demonstration site is located in Knox County, Missouri, on a corn field that is in a corn-soybean rotation. The dominant crops grown in the area are soybean, corn, wheat, and pasture forage. This area is on the fringe of the  Claypan Major Land Resource area. Claypans, characterized by the Mexico-Putnam association, are characterized by a distinct boundary between a layer of topsoil that is relatively low in clay and a layer below that has a 20% or greater increase in clay content. The claypan is compact and slowly permeable to air and water. Claypans are usually hard when dry, and plastic and sticky when wet. The Mexico-Putnam association is located on nearly flat to gently sloping landforms, the Armstrong-Leonard association is on moderately to strongly sloping areas. 

Armstrong-Leonard association

• Moderately sloping to strongly sloping soils

• Slowly permeable

• On uplands

• Hazard of erosion is major limitation to farming

Armstrong soils

• Deep, moderately well drained  soils down-slope from Leonard soils

• Surface layer is very dark grayish-brown loam

• Upper part of subsoil is dark-brown and strong brown silty clay; lower part is yellowish-brown clay loam

• Soils formed from glacial till

Leonard soils

• Somewhat poorly drained soils along the heads of drainageways

• Surface layer of very dark grayish-brown silt loam

• Subsoil is dark grayish-brown silty clay loam and gray and grayish-brown silty clay

Putnam-Mexico association (Thin Loess Prairie)

• Nearly level prairie

• Dark-gray, medium textured surface soil

• Dense clay

• Easily farmed

• Productive when limed and fertilized

• Suited to all grain and forage crops grown in region

• Major management problem is improving soil fertility

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