Annual/Termination Reports:

[08/20/2012] [07/23/2013] [11/26/2014] [04/21/2016]

Report Information

Participants

Members Present:

Fortuna,Ann Marie (annmarie.fortuna@ndsu.edu) Washington State Univ WA;
Cihacek,Larry(larry.cihacek@ndsu.edu) North Dakota State Univ, ND;
Horwath,William (wrhorwath@ucdavis.edu) Univ Calif - Davis CA;
Drijber, Rhae (rdrijber1@unl.edu) Univ Nebraska, NE;
Turco, Ronald (rturco@purdue.edu) Purdue University, IN;
Motavalli,Peter (MotavalliP@missouri.edu) Univ of Missouri, MO;
Olk, Dan (Dan.Olk@ARS.USDA.GOV) USDA-ARS, Ames IA

Guests:
Gabriel Aher, ND
Carrie Werkmeister-Karki, ND

Brief Summary of Minutes

Summary of Minutes of Annual Meeting:

NCERA 59 Meeting Minutes June 21-22, 2012 recorded and edited by Ann-Marie Fortuna and Larry Cihacek.

Thursday, June 21, 2012

Morning Session:
Introductions by current and new members. Approval of 2011 minutes. No modifications were needed.

State reports: submit to Larry by the third week of August. Use template to format.

Next years meeting site suggestions: Lincoln NE or jointly during the IUSS Carbon Conference in Madison, WI June 3-7, 2013. Date and time still need to be approved by the committee. Rhae will host.

Discussion of the potential SSSA Monograph for 30 minutes. A summary of the three discussions of the methods book outline are at the end of the minutes. Peter suggested case study additions for each method. Also suggested could be used to teach particularly in developing countries. Decided that it will not be specifically designed for teaching but the protocols and case study examples could be adapted by individual instructors.

Peter elected secretary unanimously. Incoming Chair is Rhae. Chair-elect is Will.

Ron discussed the state of Federal funds; Hatch, NIFA, NSF and more. Overall funding is flat or slightly decreasing.

Ron gave an overview of the Sosius software to be used to share drafts and edits of the proposed methods book.

Lunch Break

Afternoon Session:
Updates by members:
" Peter: Handed out his state report discussed denitrification, biofuels and international agriculture work.
" Larry: Discussed his research on C sequestration and water soluble C in soils planted to grass species. Overview of several long-term C sequestration projects at NDSU. Discussed C credits.
" Ann Marie: Overview of her projects cover crops, organic amendments, soil health and microbiology. Discussed her new program at NDSU. Examined N and C pools and their link to denitrification and nitrification.
" Will: Discussed publication on water quality.
" Ron: Discussed biomass studies and biology, water quality, denitrification in surface waters and soluble C, also in drain tiles, pathogen survival.
" Dan: Discussed his research on humic materials for enhanced plant growth.

Additional Revision/ updating of outline/topic development

Will, Dan, Ann-Marie discuss the partitioning of SOM into physical, chemical and biological fractions. Does microbial process belong in the book. All agree yes. See outline at end for detailed list of what physical, chemical and biological measurements are included.

Briefly discussed editors author responsibilities tabled for Friday session.


Friday, June 22, 2012

Morning Session:
2013 Meeting:
" Need to update current membership. Individuals that have not attended for several years need to be asked whether they still want to participate.
" Names of potential early career nominees were exchanged. These included Mary Stromberger (Colorado State); Craig Rasmussen (Arizona); Stuart Grady (New Hampshire); Janice Thies (Cornell); Michael Castellano (Iowa State); Frieda Eivazi (Lincoln University, MO); Stephanie Yarwood (Wisconsin).
" Matt Ruarke yet needs to fill out Appendix E.
" Need to have agreed to authors for the monograph chapters and the editorial responsibilities prior to 2013 meeting.

Continuing Discussion on Collaboration/Projects
" Methods book support from ASA. What methods have been significantly changed and or are new since the brown volumes.
" Committee spent 8 to 10am continuing to outline the methods book. See outline.
" Time Line for Book:
o June 28, 2013: Nebraska
o Draft outlines of each chapter due prior to meetings
o Discussion of drafts at NE meeting

Morning tour:
" Field trips to State of the Art greenhouse complex, NDSU Campus.
" Visit historical plots and discussion of soils of the Red River Valley of the North, NDSU Campus.

Afternoon tour:
" Tour SK Foods Facility (Organic grain processing facility) and discussion of management practices recommended to growers, Moorhead, MN.

Updated Book Outline
June 21, 2012

Vision for book: Provide in one volume, details on linkages between methods and concepts

Title(options): Analytical Methods for the Chemistry and Function of Soil Organic Matter
Analytical Methods for Understanding the Nature of Organic Matter
Analytical Methods for assessing the Biological, Chemical, and Physiclal Properties of Soil Organic Matter
Analytical Methods for the Biological, Chemical and Physical Properties of SOM
Methods of Soil Analysis. Part 6. Soil Organic Matter

Section 1: Concepts in SOM

Chapter 1. Historical perspective
a. Why study SOM
b. Current Issues
c. Analytical approaches
d. Future needs

Chapter 2. Carbon cycle
a. Defining SOM
b. SOM components/fraction/pools
c. Factors affecting SOM levels and composition

Chapter 3. Sampling for soil C measurement and monitoring
a. Sample collection and processing
b. Statistics
c. Calculations
d. Reporting

Section 2: Chemical Methods

Chapter 4. Total C Methods

a. Wet chemical
b. Combustion
c. Colorimetric
d. Volumetric
e. Case Studies

Chapter 5. Fractionation Methods

a. Wet chemical
b. Combustion
c. Colorimetric
d. Volumetric
e. Case Studies

Chapter 6. Characterization
a. Mass spec
b. NMR
c. FTIR
d. Calorimetry
e. Pyrolysis
f. Chromatography
g. Case studies

Section 3. Physical Methods

Chapter 7. (Title?)
a. Aggregation
b. Fractions
c. Density
d. Case Studies

Section 4. Biological Methods

Chapter 8. Biomass Methods
a. Fatty acids, biomarkers
b. QPCR
c. Case studies

Chapter 9. Biomass Diversity
a. DNA (lots)
b. RT
c. 454
d. Biochips

Chapter 10. Biological Processes
a. Enzymes
b. Mineralization

Section 5. Other Issues

Chapter 11. Quick Methods for Field Assessment

Chapter 12. Measurement of cycling/turnover

Section 6: Interpretation/Synthesis(Chapters?)
" C-Pool dynamics
" Food webs
" Interactions among element cycles
" Diversity
" Controls on NPP
" Physical roles (sorption)
" SOM & environment
" Integration and future SOM work (needs)


Formatting:
a. Review methods in the literature
i. Use summary tables to compare/select methods
ii. Graphics
b. Explain why methods use certain steps/reagents/etc.
c. Limitations/interferences/precision
d. Select/recommend (one or several common/popular methods) methods for
detailed discussion
e. Examples or case studies

Time Line:

October 2012: Cincinnati

" Authors selected and given time lines (September)
" Meeting of authors

Accomplishments

Accomplishments:<br /> " Dissolved organic matter (DOM) is important in forming noncrystalline Fe/DOM assemblages. The non-crystalline Fe forms have greater surface area and are presumed to play an important role in stabilizing soil C against changes in pH and fluctuating redox conditions (Objective 2). (CA)<br /> " Desorption reactions releasing DOM into soil solution was an important mechanism controlling the flux of dissolved organic C in soils (Objective 3). (CA) <br /> " Over the course of a three year study of soils in biofuels biomass production systems, no significant differences were observed in the TOC or peroxide oxidizable C (POXC), with mean values ranging from 21.2  29.4 g C kg-1, and 720.2  933.5 mg C kg-1 respectively. (IN)<br /> " Superior resilience was noted in observations of microbial measures of C dynamics in response to aboveground residue removal for sorghum and in the perennial monoculture of switchgrass. Microbial measures of C utilization proved to be sensitive indicators of potential changes in soil C and the rate of basal respiration (BR) was the most responsive indicator to changes in labile C. However, strong differences were also noted in the substrate-induced response. BR appears to be a strong early predictor of changes in soil C dynamics. (IN)<br /> " Evaluation of short-term flooding events and N fertilizer management on corn production and GHG production including the examination of the use of rescue N fertilizer treatments to assist in recovery from flooding. (MO)<br /> " Determining the impacts of managed subsurface drainage systems and N fertilizer management on corn production and N loss through the tile drainage system and GHG production. (MO)<br /> " Development and testing of simple, low-cost methods for assessment of labile soil organic C and N fractions for use in developing countries to assist in improving soil management to reduce soil degradation and increase crop production. (MO)<br /> " Evaluation of spatial and temporal dynamics of arbuscular mycorrhizal (AM) fungi in high production corn systems confirms carbon allocation to AM fungi from corn during the reproductive stages of growth. Evidence suggests a role in P acquisition given a significant proportion of P is taken up from the soil during this period. A combined DGGE-Cloning Method has recently been developed to elucidate AM ribotypes significant to this process. (NE)<br /> " Soil biology has been overlooked in the forensic science arena in lieu of soil chemical and physical soil properties. Investigations addressing whether high throughput DNA analysis and microbial fatty acid fingerprinting of soil microbial communities may be useful to crime scene investigation are currently ongoing. (NE)<br /> " Recent completion of a Grassland Destabilization Experiment (GDEX), http://sandhills-biocomplexity.unl.edu , attributed short-term geomorphic stability of the Nebraska Sand Hills to below ground processes, where root detritus, soil organic matter (SOM) and microbial activity persisted into the third and fourth years of the study. This resilience could not be explained by extensive soil aggregation or large pools of stabilized SOM, both absent from this ecosystem. Rather, it appears to be a legacy of the former grassland root system. (NE).<br /> " Evaluation of water soluble organic C (WSOC) in mixed species grassland systems showed that WSOC decreased with increasing soil depth and made up 5.36, 5.75, and 6.27% of total OC for Ekre Ranch, Carrington, and Dickinson, respectively. Individual species showed greater WSOC compared to cropland checks, but there was no difference among species. Species richness and harvest frequency had no effect on WSOC, while WSOC near the soil surface at Ekre Ranch was influenced by phosphorus fertilizer applications and nitrogen fertilizer applications affected subsoil WSOC. (ND)<br /> " Long-term experiments (LTE) are being evaluated for changes in SOC. Results from previous 10-yr samples indicated that the traditional WW-SF was depleting SOC and was not sustainable. The results also revealed that wheat and barley annual cropping was possible under CT and NT in 400 mm precipitation zone. (OR)<br /> " Results from these LTEs at other locations indicate that NT winter wheat  chemical fallow (WW-CF) can replace the traditional WW-SF using CT. Furthermore WW-CF increased surface residue cover that has the potential to reduce soil erosion and increase SOC. (OR)<br /> " Research focused on optimizing tillage and rotation practices to increase carbon (C) sequestration in conventional and organic agricultural systems; examining soil dynamics in long-term agroecosystems; and monitoring of greenhouse gases (GHG) in systems utilizing different sources of N and cropping systems practices. (WA)<br /> " Research is continuing on carbon sequestration as a function of nitrogen fertilizer application in continuous corn systems and effects of long-term soil management on dynamic soil properties. (WI)<br /> <br /> <br /> Additional Outcomes/Activities:<br /> <br /> Involved in organizing the 2012 ASA National Meetings symposium entitled Challenges and Innovations in Greenhouse Gas Emissions Measurements. (MO)<br /> <br /> Contributing to Committee on Organic & Sustainable Agriculture, ASA, ACS238. (WA)<br /> <br /> Funded Grant written jointly by NCERA059 members: <br /> Fortuna A., D. Collins, R. Turco, C.G. Cogger, A. Bary and A. Stone. Greenhouse Gas Emissions and Soil Quality in Long-term Integrated and Transitional Reduced Tillage Organic Systems. USDA-AFRI, Integrated Research, Education, and Extension Competitive Grants Program  Organic Transitions (ORG) Estimated $750,000. (IN, OR, WA,)<br /> <br /> <br /> <br />

Publications

Henneberry Y. K., T. E. C. Kraus, N. Peter and W. R. Horwath. 2012. Structural stability of coprecipitated natural organic matter and ferric iron under reducing conditions. Organic Geochemistry. 48: 81-89.<br /> <p><br /> Toosi E. R., T. A. Doane and W. R. Horwath. 2012. Abiotic solubilization of soil organic matter, a less-seen aspect of dissolved organic matter production. Soil Biol. Biochem. 5: 12-21.<br /> <p><br /> Mailapalli, D.R., W. R. Horwath, W. W. Wallender, M. Burger. 2012. Infiltration, Runoff, and Export of Dissolved Organic Carbon from Furrow-Irrigated Forage Fields under Cover Crop and No-Till Management in the Arid Climate of California. Journal of Irrigation and Drainage Engineering-ASC 138: 35-42<br /> <p><br /> Mailapalli DR, Wallender WW, Burger M, Horwath WR. 2011. Effects of field length and management practices on dissolved organic carbon export in furrow irrigation. Agriculture Water management. 98: 29-37.<br /> <p><br /> Nash, P.R., P.P. Motavalli, and K.A. Nelson. 2012. Nitrous oxide emissions from claypan soils due to nitrogen fertilizer source and tillage/fertilizer placement practices. Soil Sci. Soc. Am. J. 76:983-993.<br /> <p><br /> Pengthamkeerati, P., P.P. Motavalli, and R.J. Kremer. 2011. Soil microbial biomass nitrogen and ²-glucosaminidase activity response to surface compaction and poultry-litter application in a claypan soil. Applied Soil Ecology 51:79-86. <br /> <p><br /> Pengthamkeerati, P., P.P. Motavalli, and R.J. Kremer. 2011. Soil microbial activity and functional diversity changed by compaction, poultry litter and cropping in a claypan soil. Applied Soil Ecology. 48:71-80.<br /> <p><br /> Veum, K.S., K.W. Goyne, S.H. Holan, and P.P. Motavalli. 2011. Assessment of soil organic carbon and total nitrogen under conservation management practices in the Central Claypan Region, Missouri, USA. Geoderma. 167:188-196.<br /> <p><br /> Udawatta, R.P., S.H. Anderson, P.P. Motavalli, and H.E. Garrett. 2011. Clay and temperature influences on sensor measured volumetric soil water content. Agroforest. Syst. 82: 61-75.<br /> <p><br /> Isobe, K., Maruyama, K., Nagai, S., Higo, M., Maekawa, T., Mizonobe, G., Drijber, R.A., Ishii, R. 2011. Arbuscular mycorrhizal fungal community structure in soybean roots: Comparison between Kanagawa and Hokkaido, Japan. Adv. Micro.1:13-22.<br /> <p><br /> Wortman, S. E., C. A. Francis, M. L. Bernards, R. A. Drijber, and J. L. Lindquist. 2012. Optimizing cover crop benefits with diverse mixtures and an alternative termination method. Agron. J. 104:1425-1435.<br /> <p><br /> Machado, S. 2011. Soil Organic Carbon Dynamics in the Pendleton Long-Term Experiments: Implications for Biofuel Production in Pacific Northwest. Agron. J. 103:253260.<br /> <p><br /> H. T. Gollany, R. W. Rickman, Y. Liang, S. L. Albrecht, S. Machado, and S. Kang. 2011. Predicting Agricultural Management Influence on Long-Term Soil Organic Carbon Dynamics: Implications for Biofuel Production. Agron. J. 103:234246. <br /> <p><br /> Machado, S., K, Rhinhart, and S. Petrie. 2006. Long-Term Cropping Systems Effects on Soil Organic Carbon Sequestration in Eastern Oregon. J. Environ. Qual. 35:1548-1553. <br /> <p><br /> Fortuna, A., W.Honeycutt, G.Vandemark, T.Griffin, R.Larkin, Z.He, B.Wienhold, Sisistani, S.Albrecht, B.Woodbury, H.Torbert, M.Powell, R.Hubbard, R.Eigenburg, R.Wright, J.R.Alldredge, and J.B. Harsh. 2011. Links among Nitrification, Nitrifier Communities, and Edaphic Properties in Contrasting Soils Receiving Dairy Slurry. J. Environ. Qual. 41:1-11.<br /> <p><br /> Fortuna, A., K.Gunning, and W.Honeycutt. 2012. Comparison of denaturing gradient gel electrophoresis and microarray technology for detection of betaproteobacterial ammonia-oxidizing bacteria. Soil Science. 177(3):172-182.<br /> <p><br /> Maketon, C., A.Fortuna, and P.Okubara. 2012. Cultivar-Dependent Transcript Accumulation in Wheat Roots Colonized by Pseudomonas 3 fluorescens Q8r1-96 Wild Type and Mutant Strains. Biological Control. doi:10.1016/j.biocontrol. 2011.11.002.<br /> <p><br /> Bundy, L.G., T.W. Andraski, M.D. Ruark, and A.E. Peterson. 2011. Long-term continuous corn and N fertilizer effects on productivity and soil properties. Agron. J. 103:1346-1351.<br /> <br /> <br />

Impact Statements

1. This research will allow farmers to improve soil health by managing nutrient cycling to enhance soil fertility while providing ecosystem services such as reducing GHGs emissions.
2. Short-term geomorphic stability of sandy soils may be due to relics of grassland root systems rather than accumulated SOC or soil aggregation.
3. Development and utilization of soil carbon models and soil nitrogen models can provide guidelines for land management practices for policy makers and land managers.
4. Microbial measures of C utilization can be sensitive indicators of potential changes in soil C.
5. Dissolved organic matter (DOM) is important in forming noncrystalline Fe/DOM assemblages impacting soil formation processes.
6. Native SOM contributes more to DOM than in residue amended soils indicating significant roles of the SOM in desorption and exchange reactions in DOM production.

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Brief Summary of Minutes

Accomplishments

Synergistic impact on the research programs of NCERA-59:<br /> 1) Dr. Wander is presently the leader of the Soils Community of Practice for eOrganic and eXtension org. Several NCERA 59 committee members have contributed to the soils group content.<br /> 2) Dr. Snapp is working with the eXtension communities of practice for developing new crops, soil management and cover crops, and new extension materials: http://www.extension.org/pages/61075/managing-for-soil-organic-matter.<br /> 3) Students from Dr. Castellano's group are working with NCERA 059 committee member Rhae Drijber on soil organic matter dynamics in Iowa continuous corn systems. Castellanos student traveled to Dr. Drijbers labs in August 2012. <br /> <br /> <p><br /> Organizing symposia at national and international meetings will continue to promote information exchange among the professional community:<br /> 1) Dr. Weil is working with NCERA59 participation and objectives, we made several presentations to large groups of farmers and extension educators. We held a field day on soil quality assessment with cover crops. <br /> 2) Dr. Castellano and Iowa State University sponsored a symposium on Nitrogen Use Efficiency for which Castellano was a co-coordinator. NCERA059 member Will Horwath spoke at this symposium. <br /> <br /> <p><br /> The NCERA059 grant writing for collaborative research projects: <br /> Drs. Fortuna and Turco: 2011-2014 $745,950 USDA-AFRI, Integrated Research, Education, and Extension Competitive Grants Program  Organic Transitions (ORG). Fortuna A. (PD), (CO-PDs) R. Turco, C.G. Cogger, D. Collins, A. Bary and A. Stone. Greenhouse Gas Emissions and Soil Quality in Long-term Integrated and Transitional Reduced Tillage Organic Systems. <br /> <br /> <p><br /> Outreach materials will address, organismal based processes, chemical and physical measures of SOM and carbon sequestration: <br /> 1) Dr. Wander is the executive lead for the Soil Quality Website, hosted at UIUC in partnership with the USDA National Soil Tilth Lab and the Natural Resource Conservation. Hope that NCERA can reengage with this effort through the dynamic soil properties efforts that were discussed at this years meeting.

Publications

Impact Statements

1. A final outline for NCERA 59 based book entitled "Analytical Methods for Assessing Soil Organic Matter" was completed. The vision for book: Provide in one volume, details on linkages between methods and concepts related to soil organic matter.

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Brief Summary of Minutes

Please click on the below "Copy of Minutes" file to open NCERA59's 2014 annual report.

Accomplishments

Publications

Impact Statements

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Participants

Brief Summary of Minutes

See attached file for NCERA59's annual report.

NCERA 059 June 4-5, 2015

Secretary/Meeting Host: Castellano

Attendees: Michael Castellano (ISU), Larry Cihacek (NDSU),  Rhae Drijber (Univ NE-Lincoln), Sandeep Kumar (SDSU), Peter Motavalli (Univ MO), Dan Olk (USDA-ARS), Matt Ruark (Univ WI), Lisa Tiemann (Michigan State Univ.), Ron Turco (Purdue), Michelle Wander (Univ IL), Paul Verburg (Univ. of Nevada).   

Meeting agenda/notes

June 4, 2015

8:30-12:00 State Reports:

• Dan Olk: On-farm evaluation of a humic product in Iowa corn production.


• Paul Verburg: C storage in desert shrubland converted to irrigated agriculture


• Matt Ruark: Crop systems diversity, POM and aggregates


• Lisa Tiemann: Drivers of soil fertility loss and consequences for soil sustainability in Uganda


• Peter Motavalli: Flooding and land used effects on ghg emissions. After flooding takes a while to redox low enough for CH4 emissions.


• Larry Cihacek: Challenges of measuring bulk density in sandy soils. P mineralization from distillers grain.


• Mike Castellano: Nitrogen use efficiency as affected by soil organic matter


• Michelle Wander: Models, cooperation with Oak Ridge


• Ron, Rhae and Sandeep elected not to present.

1:00-5:00 Field trip to Des Moines Water Works

June 5, 2015

8:30-12:00

• Status of SSSA, Ron Turco


• Discussion of NCERA59 renewal. Michelle Wander agreed to lead proposal.

Accomplishments

Publications

Cihacek, L. J., L A. Foss and K. A. Jacobson.  2015. A comparison of soil sampling devices for soil bulk density determination for carbon sequestration monitoring. Commun. Soil Sci. Plant Anal. 46(2):180-184.

Dose, H. L., A. M. Fortuna, L. J. Cihacek, J. Norland, T. M. DeSutter, D. E. Clay, and J. Bell.  2015. Biological indicators provide short term soil health assessment during sodic soil reclamation. Ecol. Ind. 58244-253.

Tiemann, L. K., Grandy, A. S., Marin-Spiotta, E., Atkinson, E. E., and M. D. McDaniel. (2015) Crop rotational diversity enhances belowground communities and functions in an agroecosystem. Ecology Letters 18, 761-771.

Billings, S. A., Tiemann, L. K., Ballantyne IV, F., Lehmeier, C., & K. Min. (2015) Investigating microbial transformations of soil organic matter: synthesizing knowledge from disparate fields to guide new experimentation. SOIL 1, 313-330.

Cates, A.M., M.D. Ruark, J.L. Hedtcke, and J.L. Posner. 2015. Long-term tillage, rotation, and perennialization effects on particulate and aggregate soil organic matter. Soil and Tillage Research (accepted 13 September 2015).

Machado. S., L. Pritchett, and S. Petrie. 2015. No-tillage Cropping Systems can Replace Traditional Summer Fallow in North-Central Oregon. Agron. J. 107:1863-1877

Ghimire, R. and S. Machado. 2015. Long-Term Crop Residue and Nitrogen Management Effects on Soil Profile Carbon and Nitrogen in Wheat – Fallow Systems. Agron. J. 107:2015-2015.

Brady, M.V., K. Hedlund, R-G. Cong, L. Hemerik, S. Hotes, S. Machado, L. Mattsson, E. Schulz and I. K. Thomsen. 2015. Valuing Supporting Soil Ecosystem Services in Agriculture: a Natural Capital Approach. Agron. J. 03/30/2015. doi:10.2134/agronj14.0597

Gwenzi, W., N. Chaukura, F.N.D. Mukome, S. Machado, B. Nyamasoka. 2015. Biochar production and applications in sub-Saharan Africa: Opportunities, constraints, risks and uncertainties. Journal of Environmental Management 150:250-261.

Smiley, R. W., Machado, S., Gourlie, J. A., Pritchett, L. C., Yan, G. P., and Jacobsen, E. E. 2013. Effects of crop rotations and tillage on Pratylenchus spp. in the semiarid Pacific Northwest United States. Plant Dis. 97:537-546.

Smiley, R. W., Machado, S., Gourlie, J. A., Pritchett, L. C., Yan, G. P., and Jacobsen, E. E. 2013. Influence of semi-arid cropping systems on root diseases and inoculum density of soilborne pathogens. Plant Disease 97:547-555.

Humberto Blanco-Canqui, Richard B. Ferguson, Charles A. Shapiro, Rhae A. Drijber, and Dan T. Walters. 2014. Does Inorganic Nitrogen Fertilization Improve Soil Aggregation? Insights from Two Long-Term Tillage Experiments. Journal of Environmental Quality 2014 43:995-1003. 

Lehman, R.M., Ducey, T., Jin, V., Acosta-Martinez, V., Ahlschwede, C., Jeske, E., Drijber, R., Cantrell, K., Frederick, J., Fink, D., Osborne, S., Novak, J., Johnson, J.F., Varvel, G., 2014. Soil Microbial Community Response to Corn Stover Harvesting Under Rain-Fed, No-Till Conditions at Multiple US Locations.  Bioenergy Research 7: 540-550.

Jianfeng, Duan, Hui Tian, Rhae A. Drijber, Yajun Gao. 2015. Systemic and local regulation of phosphate and nitrogen transporter genes by arbuscular mycorrhizal fungi in roots of winter wheat (Triticum aestivum L.). Plant Physiology and Biochemistry 96:199-208.

Marzano, S.Y., Wander, M.M., Villamil, M., Ugarte, C.M.  and D. Eastburn.  2015. Organic transition effects on soilborne diseases of soybean and populations of Pseudomonadaceae. Agronomy J. 107:1087-1097.  

Qin, Z., Dunn, J.B., Kwon, H-Y, Mueller, S. and M.M. Wander. 2016. Influence of spatially-dependent, modeled soil carbon emission factors on life-cycle greenhouse gas emissions of corn and cellulosic ethanol. Global Change Biol. DOI: 10.1111/gcbb.1233

Throckmorton, HM, JA Bird, N Monte, T Doane, MK Firestone, WR Horwath. 2015. The soil matrix increases microbial C stabilization in temperate and tropical forest soils. Biogeochemistry 122: 35-45

Silva, LCR, TA Doane, RS Corrêa, V Valverde, EIP Pereira, WR Horwath. 2015. Iron-mediated stabilization of soil carbon. Ecological Applications. 25: 1226-1234

 

Grants

 

 

 

 

 

Accomplishments

Publications

Impact Statements

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