Use of a pneumatic penetrometer to study the impedance of soil crust on seedling emergence. II. Physical properties of soil crust and estimation of seedling emergence thrust
1988
Visoot Verasan (Kasetsart Univ., Kamphaeng Saen Campus, Nakhon Pathom (Thailand). Faculty of Agriculture. Dept. of Soils)
Soil crust of 2 cm thick was induced on a Kampangsan soil. Some physical properties were evaluated for the horizontal slices of the crust and be compared to it's original soil. A noteworthy horizontal segregation of particle size into layers was observed. Test for corn seedling thrust was conducted using a perfect crust plate a different moisture. Seedling thrust, it's penetrating strength, and emergence energy of the seedling were simulated by the equations describing the dependence of strengths to crust moisture content as the penetrometer probe advanced through it.
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