Wasserspannungsabhängiger eindringwiderstand eines pelosols |
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| Authors: | HH Becher |
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| Institution: | Lehrstuhl für Bodenkunde, Technische Universität München, D-8050 Freising 12 Bundesrepublik Deutschland |
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| Abstract: | Penetration resistance was measured with probes 1.5 and 0.55 mm in diameter on relatively small cores and aggregates from horizons of a Pelosol (Chromudert) profile (a soil with 55–65% clay) at moisture tensions ranging from 0 to 600 cm H2O. The resistance was highly correlated with moisture tension and with water content. At a moisture tension of about 450 cm H2O, resistance to penetration was as high as 25 kp/cm2, a value that severely restricts root growth. That correlation was more evident with aggregate than with core samples. Resistance to penetration of the aggregates differed from that of the core samples with the ratio of friction to the cross section.Resistance to penetration by the probes is also negatively correlated with amounts of organic matter in the samples. This correlation suggests maintenance and increasing levels of organic matter as measures to lower penetration resistance in horizons of Pelosols. |
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