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• W2044964457 abstract "Soils with clay subsoil layers or “claypans” encompass a large global area and may be more susceptible to surface compaction and N losses due to perched water in the surface horizons caused by the relatively low hydraulic conductivity of the claypan. Addition of an organic amendment, such as animal manure, may reduce the negative effects of soil compaction on crop growth because of its effects on soil physical, chemical and biological properties. The objectives of this study were to determine the first year and residual effects of surface compaction on soil physical properties, crop yield, and N availability in a claypan soil; and to evaluate the use of poultry litter to manage surface compaction. A field trial planted to corn (Zea mays L.) was conducted on a Mexico silt loam claypan soil in North Central Missouri for 2 years (2000 and 2001). Treatments consisted of two levels of surface compaction (0 and 2 passes with a filled water wagon) and four rates (0, 4.8, 9.6 and 16 Mg ha−1) of turkey litter in a split block design with four replications. Surface compaction in unamended soils increased soil bulk density (an average of 0.19 Mg m−3 in the 0–10 cm depth and 0.09 Mg m−3 in the 10–20 cm depth) and penetrometer resistance (an average of 3.11 MPa in the 0–5 cm depth, 2.18 MPa in the 5–10 cm depth, and 0.98 MPa in the 10–20 cm depth) over the 2 years of the experiment. Addition of 16 Mg ha−1 of turkey litter significantly lowered soil penetrometer resistance an average of 1.04 MPa at the 0–5 cm depth in 2000 and 2001. Surface compaction decreased soil inorganic N regardless of whether it received turkey litter. Silage and grain yield and N uptake increased with increasing rates of turkey litter in 2000 and 2001. Surface compaction reduced both silage and grain yield approximately 470 g kg−1 in 2000, 200 g kg−1 in 2001 and 180 g kg−1 in the following season after compaction occurred. Nitrogen recovery efficiency was reduced from 290 to 140 g kg−1 by compaction in 2000. This study suggests that single applications of an organic amendment applied at agronomic rates may have several initial and residual effects on the compactability and remediation of claypan soils, including beneficial effects on soil physical properties and N availability." @default.
• W2044964457 created "2016-06-24" @default.
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• W2044964457 date "2003-12-01" @default.
• W2044964457 modified "2023-10-02" @default.
• W2044964457 title "Surface compaction and poultry litter effects on corn growth, nitrogen availability, and physical properties of a claypan soil" @default.
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• W2044964457 doi "https://doi.org/10.1016/s0378-4290(03)00098-4" @default.
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