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ASRU Study for Greenhouse gas Reduction through Agricultural Carbon Enhancement network in Sidney, Montana

posted on 2023-11-30, 08:43 authored by Upendra Sainju

Information is needed to mitigate dryland soil greenhouse gas (GHG) emissions by using novel management practices. We evaluated the effects of cropping sequence and N fertilization on dryland soil temperature and water content at the 0- to 15-cm depth and surface CO2, N2O, and CH4 fluxes in a Williams loam in eastern Montana. Treatments were no-tilled continuous malt barley (Hordeum vulgaris L.) (NTCB), no-tilled malt barley-pea (Pisum sativum L.) (NTB-P), and conventional-tilled malt barley-fallow (CTB-F) (control), each with 0 and 80 kg N ha-1. Gas fluxes were measured at 3 to 14 d intervals using static, vented chambers from March to November, 2008 to 2011. Soil temperature varied but water content was greater in CTB-F than in other treatments. The GHG fluxes varied with date of sampling, peaking immediately after substantial precipitation (>15 mm) and N fertilization during increased soil temperature. Total CO2 flux from March to November was greater in NTCB and NTB-P with 80 kg N ha-1 than in other treatments from 2008 to 2010. Total N2O flux was greater in NTCB with 0 kg N ha-1 and in NTB-P with 80 kg N ha-1 than in other treatments in 2008 and 2011. Total CH4 uptake was greater with 80 than with 0 kg N ha-1 in NTCB in 2009 and 2011. Because of intermediate level of CO2 equivalent of GHG emissions and known favorable effect on malt barley yield, NTB-P with 0 kg N ha-1 might mitigate GHG emissions and sustain crop yields compared to other treatments in eastern Montana. For accounting global warming potential of management practices, however, additional information on soil C dynamics and CO2 associated with production inputs and machinery use are needed.

Resources in this dataset:


Agricultural Research Service


Data contact name

Sainju, Upendra

Data contact email


U.S. Department of Agriculture - Agricultural Research Service

Use limitations

Citation requested if data is used.

Temporal Extent Start Date


Temporal Extent End Date



  • irregular


  • Not specified

Geographic Coverage


ISO Topic Category

  • environment
  • farming

Ag Data Commons Group

  • Long-Term Agroecosystem Research

National Agricultural Library Thesaurus terms

Long-Term Agroecosystem Research Network; arid lands; greenhouse gas emissions; greenhouse gases; cropping sequence; nitrogen fertilizers; soil temperature; water content; carbon dioxide; nitrous oxide; methane; Argiustolls; malt; barley; Hordeum vulgare; Pisum sativum; grain yield; global warming potential; soil carbon; fallow; biomass; crop residues; rhizosphere; peas; crop rotation; no-tillage; fertilizer rates

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

ARS National Program Number

  • 211
  • 212

Pending citation

  • No

Public Access Level

  • Public

Preferred dataset citation

Sainju, Upendra (2020). ASRU Study for Greenhouse gas Reduction through Agricultural Carbon Enhancement network in Sidney, Montana. U.S. Department of Agriculture - Agricultural Research Service.