Replacing fallow with cover crops in a semiarid soil: effects on soil properties

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Show simple item record Blanco-Canqui, Humberto Holman, John D. Schlegel, Alan J. Tatarko, John Shaver, Tim M. 2013-11-19T22:35:36Z 2013-11-19T22:35:36Z 2013-11-19
dc.description.abstract Replacement of fallow in crop–fallow systems with cover crops (CCs) may improve soil properties. We assessed whether replacing fallow in no-till winter wheat (Triticum aestivum L.)–fallow with winter and spring CCs for 5 yr reduced wind and water erosion, increased soil organic carbon (SOC), and improved soil physical properties on a Ulysses silt loam (fine-silty, mixed, superactive, mesic Aridic Haplustolls) in the semiarid central Great Plains. Winter triticale (×Triticosecale Wittm.), winter lentil (Lens culinaris Medik.), spring lentil, spring pea (Pisum sativum L. ssp.), and spring triticale CCs were compared with wheat–fallow and continuous wheat under no-till management. We also studied the effect of triticale haying on soil properties. Results indicate that spring triticale and spring lentil increased soil aggregate size distribution, while spring lentil reduced the wind erodible fraction by 1.6 times, indicating that CCs reduced the soil’s susceptibility to wind erosion. Cover crops also increased wet aggregate stability and reduced runoff loss of sediment, total P, and NO[subscript 3]–N. After 5 yr, winter and spring triticale increased SOC pool by 2.8 Mg haˉ¹ and spring lentil increased SOC pool by 2.4 Mg haˉ¹ in the 0- to 7.5-cm depth compared with fallow. Triticale haying compared with no haying for 5 yr did not affect soil properties. Nine months after termination, CCs had, however, no effects on soil properties, suggesting that CC benefits are short lived in this climate. Overall, CCs, grown in each fallow phase in no-till, can reduce soil erosion and improve soil aggregation in this semiarid climate. en_US
dc.language.iso en_US en_US
dc.relation.uri en_US
dc.rights Permission to archive granted by the Soil Science Society of America, October 31, 2013. en_US
dc.subject Cover crops en_US
dc.subject Fallow en_US
dc.subject Soil properties en_US
dc.title Replacing fallow with cover crops in a semiarid soil: effects on soil properties en_US
dc.type Article (publisher version) en_US 2013 en_US
dc.citation.doi doi:10.2136/sssaj2013.01.0006 en_US
dc.citation.epage 1034 en_US
dc.citation.issue 3 en_US
dc.citation.jtitle Soil Science Society of America Journal en_US
dc.citation.spage 1026 en_US
dc.citation.volume 77 en_US
dc.contributor.authoreid jholman en_US
dc.contributor.authoreid schlegel en_US
dc.contributor.authoreid tatarko en_US

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