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United States Department of Agriculture

Agricultural Research Service

Daniel S Long (Dan)

Research Leader

Dan Long


  • BS Soils, Washington State University, 1982
  • MS Soils, Montana State University, 1986
  • PhD Agronomy, Cornell University, 1993

Research Experience

  • Assistant/Associate Prof., Montana State Univ. Northern Agric. Res. Center, Havre, 1994-2004
  • Supervisory Research Agronomist, USDA-ARS, Pendleton OR, 2004-Present

Research Program: Agronomy

The goal of the agronomy research effort is to help advance the production of oilseeds in the Columbia Plateau region of the Pacific Northwest and supply feedstock for advanced biofuel, which is expected to be in great demand in the near future. Brassica plant species have potential to be grown as dryland oilseed crops to diversify the traditional winter wheat-summer fallow (WW-SF) system in the largest, driest portion of this region.

The direct customers of this research are growers who are keenly interested in optimal rotation strategies for integrating oilseed crops into WW-SF and deriving bio-economic benefits of rotating oilseed crops with winter wheat. Research findings on economic returns and risk of oilseed production under water-limited conditions will be supplied to growers, crushers, biorefiners, and policy makers. Governments, general public, and interest groups will have information concerning the environmental and economic implications of different cropping systems used to produce food and biofuel feedstocks.


Long, D., J. Whitmus, R. Engel, and G. Brester. Net returns from terrain-based variable-rate nitrogen management on dryland spring wheat in northern Montana. Agronomy Journal. (Accepted 9 Jan. 2015)
Kendall, J., D. Long, H. Collins, F. Pierce, A. Chatterjee, J. Smith, and S. Young. Soil carbon dynamics of transition to Pacific Northwest Cellulosic ethanol feedstock production. Soil Science Society of America Journal. (Accepted 14 Nov. 2014)
Williams, J., Wuest, S., and Long, D. Soil and water conservation in the Pacific Northwest through no-tillage and intensified crop rotations. Journal of Soil Water Conservation. 69(6): 495-504. 2014.
View PDF Martin, C., McCallum, J., and Long, D. A web-based calculator for estimating the profit potential of grain segregation by protein concentration. Agronomy Journal. 105:721-727. 2013.
Long, D. and McCallum, J. Mapping straw yield using on-combine light detection and ranging (lidar). International Journal of Remote Sensing. 34:6121-6134. 2013.
Chatterjee, A., Long, D., and Pierce, F. Switchgrass influences soil biogeochemical processes in dryland region of the Pacific Northwest. Communications in Soil Science and Plant Analysis. 44:2314-2326. 2013.
View PDF Long, D., McCallum, J., and Scharf, P. Optical-mechanical system for on-combine segregation of wheat by grain protein concentration. Agronomy Journal. 105:1529-1535. 2013.
View PDF Lenssen, A., Long, D., Grey, W., Blodgett, S., and Goosey, H. Spring wheat production and associated pests in conventional and diversified cropping systems in north central Montana. Crop Management. 2013.
Shoshany, M., Long, D., and Bonfil, D. Remote sensing for sustainable agriculture. International Journal of Remote Sensing. 34:1-3. 2013.
Williams, J., Long, D., and Wuest, S. Capture of plateau runoff by GPS guided seed drill operation. Journal of Soil and Water Conservation. 66:355-361. 2012.
Young, F., Long, D., and Alldredge, J. Effect of planting methods on spring canola (Brassica napus L.) establishment and yield in the low-rainfall region of the Pacific Northwest. Crop Management. 11(1). 2012.
Long. D., McCallum, J., Young, F., and Lenssen, A. In-stream measurement of canola (Brassica napus L.) seed oil concentration using in-line infrared reflectance spectroscopy. Journal of Near Infrared Spectroscopy. 20:387-395. 2012.
Franzen, D., Long, D., Sims, A., Lamb, J., Casey, F., Starika, J., Halvorson, M., and Hoffman, V. Evaluation of methods to determine residual soil nitrate zones across the northern Great Plains of the USA. Precision Agriculture. 12:594-606. 2011.
View PDF Long, D., Scharf, P., and Pierce, F. Narrow-width harvester for switchgrass and other bioenergy crops in experimental plots. Agronomy Journal. 103:780-785. 2011.
Williams, J. and Long, D. Intensive crop rotation yield and economic performance in minimum tillage and no-tillage in northeastern Oregon. Crop Management. 10(1). 2011.
Eitel, J., Vierling, L., Long, D., Litvak, M., and Eitel, K. Simple assessment of needleleaf and broadleaf chlorophyll content using a flatbed color scanner. Canadian Journal of Forest Research. 41:1445-1451. 2011.
Hunt, E., Daughtry, C., Long, D., and Eitel, J. Remote sensing of chlorophyll content at leaf and canopy scales using a visible band index. Agronomy Journal. 103:1090-1099. 2011.
Eitel, J., Vierling, L., Long, D., and Hunt, E. Early season remote sensing of wheat nitrogen status using a green scanning laser. Agricultural and Forest Meteorology. 151:1338-1345. 2011.
Eitel, J., Vierling, L., Litvak, M., Long, D., Schulthess, U., Ager, A., Krofcheck, D., and Stroscheck, D. Broadband, red-edge information from satellites improves early stress detection in a New Mexico conifer woodland. Remote Sensing of Environment. 115:3640-3546. 2011.
View Link Eitel, J., Keefe, R., Long, D., Davis, A., and Vierling, L. Active optical remote sensing for improved monitoring of seedling stress in nurseries. Sensors. 10:2843-2850. 2010.
Eitel, J., Vierling, L., and Long, D. Simultaneous measurements of plant structure and chlorophyll content in broadleaf saplings with a terrestrial laser scanner. Remote Sensing of Environment. 114:2229-2237. 2010.
View Link Reese, C., Long, D., Clay, S., Clay, D., and Beck, D. Nitrogen and water stress impacts hard red spring wheat (Triticum aestivum L.) canopy reflectance. Journal of Terrestrial Observation. 2(1):Article 7. 2010.
Williams, J., Gollany, H., Seimens, M., Wuest, S., and Long, D. Comparison of runoff, soil erosion, and winter wheat yields from no-till and inversion tillage production systems in northeastern Oregon. Journal of Soil Water Conservation. 64:43-52. 2009.
Pimstein, A., Eitel, J., Long, D., Mufradi, I., Karnieli, A., and D. Bonfil. A spectral index to monitor the head-emergence of wheat in semi-arid conditions. Field Crops Research. 111:218-225. 2009.
Eitel, J., Long, D., Gessler, P., Hunt, E., and Brown, D. Sensitivity of ground-based remote sensing estimates of wheat chlorophyll content to variation in soil reflectance. Soil Science Society of America Journal. 73:1715-1723. 2009.
Long, D., J. Eitel, and Huggins, D. Assessing nitrogen status of dryland wheat using the canopy chlorophyll index. Crop Management. 8(1). 2009.
Long, D., Engel, R., and Siemens, M. Measuring grain protein concentration with in-line near infrared reflectance spectroscopy. Agronomy Journal. 100:247-252. 2008.
Eitel, J., Long, D., Gessler, P., and Hunt, E. Combined spectral index to improve ground-based estimates of nitrogen status in dryland wheat. Agronomy Journal. 100:1694-1702. 2008.
Eitel, J., Long, D., Gessler, P., and Smith, A. Using in-situ measurements to evaluate the new RapidEyeTMsatellite series for prediction of wheat nitrogen status. International Journal of Remote Sensing. 28:4183-4190. 2007.
Engel, R., Long, D., and Carlson, G. Grain protein as a post-harvest index of nitrogen status for winter wheat in the northern Great Plains. Canadian Journal of Plant Science. 86(2):425-431. 2006.
Long, D., Engel, R., and Carpenter, F. On-combine sensing and mapping of wheat protein concentration. Crop Management. 4(1). 2005.
Wraith, J., Robinson, D., Jones, S., and Long, D. Spatially characterizing apparent electrical conductivity and water content of surface soils with time domain reflectometry. Computers and Electronics in Agriculture. 46:239-261. 2005.

Last Modified: 10/19/2016
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