Soils & Fertility Publications

161 Publications

Comparison of Greenhouse Gas Offset Quantification Protocols for Nitrogen Management in Dryland Wheat Cropping Systems of the Pacific Northwest

TT Brown, CM Lee, CE Kruger, JP Reganold, DR Huggins. 2017. Frontiers in Environmental Science 5, 72.

Building Soils for Better Crops – 2016 Conference

Biofumigant Cover Cropping in Potatoes: Dale Gies (Farmer to Farmer Case Study Series)

Yorgey, G.G., S.I. Kantor, C.E. Kruger, K.M. Painter, H. Davis, and L.A. Bernacchi. 2017. Pacific Northwest Extension Publication 693, Pullman, WA.

Soil Amendments

Yorgey, G., W. Pan, R. Awale, S. Machado, A. Bary. 2017. Chapter 7 In Yorgey, G. and C. Kruger, eds. Advances in Dryland Production Systems in the Pacific Northwest. Washington State University Extension, Pullman, WA.

Soil Health

Awale, R., S. Machado, R. Ghimire, P. Bista.  Soil Health. Chapter 2 In Yorgey, G. and C. Kruger, eds. Advances in Dryland Production Systems in the Pacific Northwest. Washington State University Extension, Pullman, WA.

Soil Fertility Management

Borrelli, K., T. Maaz, W. Pan, P. Carter, H. Tao. 2017. Chapter 6 In Yorgey, G. and C. Kruger, eds. Advances in Dryland Production Systems in the Pacific Northwest. Washington State University Extension, Pullman, WA.

Phosphorus Uptake by Potato from Fertilizers Recovered from Anaerobic Digestion

Collins, H. P., E. Kimura, C. S. Frear, and C. E. Kruger. 2016. Agron. J. 108:2036-2049. doi:10.2134/agronj2015.0302

Precision Nitrogen Application: Eric Odberg Case Study

Yorgey, G., S. Kantor, K. Painter, H. Davis, and L. Bernacchi. 2014. Video and text farmer case study. Eric Odberg is a fourth generation farmer who practices no-till management and was an early adopter of variable rate nitrogen (VRN) application in the dryland production region of the Pacific Northwest.

Increasing resilience among cereal-based farmers in the Inland Pacific Northwest – Farmer to Farmer Case Studies

Yorgey, Georgine, Kathleen Painter, Hilary Davis, Kristy Borrelli, Sylvia Kantor, Leigh Bernacchi, R. Dennis Roe, Chad Kruger  2014.  Video and print case studies part of REACCH PNA project. The goal of these case studies to inspire others to take management risks on their farms that can improve their overall sustainability and resiliency into the future. Future case studies are in progress and will focus on farmers who manage water in irrigated systems, tillage practices and residue management in unique ways.

Productivity, economics, and fruit and soil quality of weed management systems in commercial organic orchards in Washington State, USA

Granatstein, D., P. Andrews, and A. Groff. May 2014. Organic Agriculture. DOI 10.1007/s13165-014-0068-0

Site-Specific Trade-offs of Harvesting Cereal Residues as Biofuel Feedstocks in Dryland Annual Cropping Systems of the Pacific Northwest, USA

Huggins, D.R., C.E. Kruger, K.M. Painter, D.P. Uberuaga. BioEnergy Research. June 2014, Volume 7, Issue 2, pp 598-608.

Nitrogen Management and Climate Change Mitigation in Pacific Northwest Cropping Systems

Yorgey, G. 2014. Recorded webinar. Part of Pacific Northwest Agriculture and Climate Change Webinar Series available here: http://csanr.wsu.edu/webinars/pnw-ag-and-climate-change/ .

Nitrous Oxide Emissions in Inland Pacific Northwest Cropping Systems

Yorgey, G. 2014. Recorded webinar. Part of Pacific Northwest Agriculture and Climate Change Webinar Series available here: http://csanr.wsu.edu/webinars/pnw-ag-and-climate-change/ .   Flux Tower 3-minute video referenced in presentation.

Nitrogen Cycling and Losses in Agricultural Systems

Borrelli, K. 2014. Recorded webinar. Part of Pacific Northwest Agriculture and Climate Change Webinar Series available here: http://csanr.wsu.edu/webinars/pnw-ag-and-climate-change/ .

Management to Reduce N2O Emissions in Organic Vegetable Production Systems

Cogger, C., A. Fortuna, D. Collins. Feb 27, 2014. The second of a two-part webinar series on Greenhouse Gas Emissions and Soil Quality in Long-term Integrated and Transitional Reduced Tillage Organic Systems.

This is the focus of our current research. How do different organic vegetable production systems affect N2O emissions, and how do other outcomes of those systems affect their potential for adoption?

  • Systems include full tillage with high-carbon amendment (compost), full tillage with low carbon amendment (broiler litter), pasture-vegetable rotation, and reduced tillage cover crop mulch.
  • Measurements include N2O and CO2 emissions, soil N, microbial ecology focused on denitrification organisms, crop yield, and soil quality. Measurements are focused on key times during the season, including amendment application and tillage, irrigation, and freeze-thaw.

Intended audience is other researchers, and interested extension faculty and farmers.

Why the Concern about Nitrous Oxide Emissions?

Cogger, C., A. Fortuna, D. Collins. Feb 25, 2014. The first of a two-part webinar series on Greenhouse Gas Emissions and Soil Quality in Long-term Integrated and Transitional Reduced Tillage Organic Systems.

Topics for this webinar include:

  • Source and properties of N2O as a greenhouse gas, its relative contribution to global
  • warming, and the role of agriculture in N2O emissions
  • Review of the nitrogen cycle and the production of N2O
  • The relationship between organic practices and N2O production
  • How we measure N2O emissions

Intended audience is extension faculty and farmers who want a big picture perspective on why we’re interested in nitrous oxide emissions.

Irrigated Ag Information Service

A new WSU Extension website for agricultural industry professionals is designed to provide users with a customizable source of timely information on all aspects of irrigated agriculture. The service is completely free and was developed by a team of WSU Extension irrigation and agronomy experts.

Soil Fertility in Organic Systems: A Guide for Gardeners and Small Acreage Farmers

Collins,D. C. Miles, C. Cogger, R. Koenig. 2013.  Pacific Northwest Extension Publication PNW646.

Soil Carbon Dynamics and Climate Change Mitigation in the Inland Pacific Northwest

Yorgey, G. 2013.  Recorded webinar.  Part of Pacific Northwest Agriculture and Climate Change Webinar Series available here http://csanr.wsu.edu/webinars/pnw-ag-and-climate-change/ .

Organic Farming Footprints

WSU webpage for the OFoot project, working to provide a scientifically sound yet simple estimation of the carbon and nitrogen sequestration and net greenhouse gas (GHG) balance likely in a given organic cropping system scenario.

Carbon storage and nitrous oxide emissions of cropping systems in eastern Washington: A simulation study

Stöckle, C., S. Higgins, A. Kemanian, R. Nelson, D. Huggins, J. Marcos, and H. Collins. Journal of Soil and Water Conservation 2012 67(5):365-377; doi:10.2489/jswc.67.5.365.

Soil carbon sequestration in the dryland cropping region of the Pacific Northwest

Brown, T.T., and D.R. Huggins. Journal of Soil and Water Conservation 2012 67(5):406-415; doi:10.2489/jswc.67.5.406.

Global Climate Change

Weddell, B., L. Carpenter-Boggs, and S. Higgins. June 2012. FS069E. Washington State University researchers have taken a departure from the regionally focused, applied-science extension publication to write a fact sheet on the science, debate and challenges of global climate change.

Soil Testing: A Guide for Farms with Diverse Vegetable Crops

Collins, D. 2012. Washington State University Extension. EM050E.

Reduced Tillage on Organic Farms Virtual Field Day

WSU researchers and extension educators are researching different methods for reducing tillage in organic vegetable production. This video demonstrates termination of barley and vetch cover crops with a roller/crimper and flail mower.

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