Long-Term Effect of Nitrogen and Tillage Management on Soil Carbon Pools in the Semiarid Northern Great Plains |
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| Authors: | Amitava Chatterjee Jasper Teboh Spencer Nelson Ezra Aberle Blain G Schatz Szilvia Zilahi-Sebess |
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| Institution: | 1. Department of Soil Science, North Dakota State University, Fargo, North Dakota, USA;2. Carrington Research Extension Center, North Dakota State University, Carrington, North Dakota, USA |
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| Abstract: | No-tillage and manure application effect on soil organic carbon (SOC) and total nitrogen (N) concentrations were studied under a 27-year-old 4-year rotation consisting corn (Zea mays L.)-soybean (Glycine max L.)-wheat (Triticum aestivum L.)-field pea (Pisum sativum L.). Under each crop, four applied N treatments were control, annual urea-N applications at the rate of 45 and 89 kg N ha?1, and composted beef cattle feedlot manure-N at the rate 179 kg N ha?1 applied once every four year. For each fertilizer treatment, no-till (NT) and conventional till (CT) were compared for basic soil properties, SOC, and total N within 0–15 cm soil. Manure application significantly reduced soil bulk density and increased SOC and total N over urea-N. Particulate organic matter, mineralizable N, and permanganate-oxidizable C fractions significantly related with SOC. Long-term manure additions and no-tillage had potential to improve soil compaction and maintain SOC over chemical fertilizer N and CT. |
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| Keywords: | Manure no-tillage particulate organic matter (POM) permanganate oxidizable carbon (POC) soil carbon |
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