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Remediation/Restoration of Degraded Soil: I. Impact on Soil Chemical Properties

Permanent URL:
http://handle.nal.usda.gov/10113/59381
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Abstract:
Nutrient dynamics in the calcareous eroded soils of the western United States may react differently than the acid soils in the eastern United States. The objectives of this study were to evaluate the impact of tillage practices and N treatments on changes in soil nutrient constituents. The eroded study was initiated in 2006 at the Agriculture Research Center, Hays, KS, on an Armo silt loam (fine-loamy, mixed, mesic Entic Haplustolls). Tillage practices were no-tillage (NT) and conventional tillage (CT). Beef manure (M) and urea, as commercial fertilizer (F) at low (L) and high (H) rates were applied as N sources. The control (C)treatment, with no N added, was included under both tillage practices. Annually (2006–2011) spring soil samples were taken at 0- to 15-cm and 15- to 30-cm depths. Soil chemical properties were in influenced by N treatments and sampling depths, but not by tillage. Soil acidity (pH) was reduced in 2011 compared with 2006. Relative to control, more reduction in soil pH was observed with HM (21%) compared with HF treatment. Soil EC with HM and HF was approximately 2.2 times greater than LM and LF. Soil extractable P with HM substantially increased, 45.9 mg kg–1, compared with LM, 18.3 mg kg–1, at the surface 0 to 15 cm. The change in soil organic carbon (SOC) associated with M was 36-fold higher than F treatments. In general, the use of M as N source improved soil nutrient dynamics in this eroded site compared with F.
Author(s):
Maysoon M. Mikha , Joseph G. Benjamin , Phillip W. Stahlman , Patrick W. Geier
Note:
USDA Scientist Submission
Source:
Agronomy Journal 2013 12 13 v.106 no.
Language:
English
Year:
2013
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.