Scientists & Staff

Featured Publications & Products

• Ponder, Felix Jr. 2011. Contrasting the effects of organic matter removal and soil compaction on root biomass of 9-year-old red oak, white oak, and shortleaf pine in a Missouri Ozark forest. In: Fei, Songlin; Lhotka, John M.; Stringer, Jeffrey W.; Gottschalk, Kurt W.; Miller, Gary W., eds. Proceedings, 17th central hardwood forest conference; 2010 April 5-7; Lexington, KY; Gen. Tech. Rep. NRS-P-78. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 323-331.
• Ponder, Felix Jr. 2010. Response of young ash trees to cultural treatments not all positive. In: Michler, Charles H.; Ginzel, Matthew D., eds. 2010. Proceedings of symposium on ash in North America; 2010 March 9-11; West Lafayette, IN. Gen. Tech. Rep. NRS-P-72. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 64.
• Ponder, Felix, Jr.; Tadros, Mahasin; Loewenstein, Edward F. 2009. Microbial properties and litter and soil nutrients after two prescribed fires in developing savannas in an upland Missouri Ozark Forest. Forest Ecology and Management. 257: 755-763.
• Ponder, Felix, Jr. 2008. Performance of four hardwoods on a good preharvested site, without weed control, treated with fire before planting and with and without tree shelter. In: Lockhart, Brian Roy; Gardiner, Emile S.; Dey, Daniel C., eds. Tenth workshop on seedling physiology and growth problems in oak plantings; 2007 October 16-17; Jackson, MS. Gen. Tech. Rep. NRS-P-32. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 14.
• Ponder, Felix. 2008. Nine-year response of hardwood understory to organic matter removal and soil compaction. Northern Journal of Applied Forestry. 25(1): 25-31.

Publications & Products

• Dey, Daniel C.; Van Sambeek, J.W.; Ponder, Felix, Jr.; Kabrick, John M. 2008. Afforesting oaks in bottomlands. In: Lockhart, Brian Roy; Gardiner, Emile S.; Dey, Daniel C., eds. Tenth workshop on seedling physiology and growth problems in oak plantings; 2007 October 16-17; Jackson, MS. Gen. Tech. Rep. NRS-P-32. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 9.
• Ponder, Felix Jr. 2008. Early understory biomass response to organic matter removal and soil compaction. In: Jacobs, Douglass F.; Michler, Charles H., eds. 2008. Proceedings, 16th Central Hardwood Forest Conference; 2008 April 8-9; West Lafayette, IN. Gen. Tech. Rep. NRS-P-24. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 544-551.
• Ponder, Felix Jr.; Kramer, Matthew John; Eivazi, Freida. 2008. Effect of fertilizer treatments on an alkaline soil and on early performance of two bottomland oak species. In: Jacobs, Douglass F.; Michler, Charles H., eds. 2008. Proceedings, 16th Central Hardwood Forest Conference; 2008 April 8-9; West Lafayette, IN. Gen. Tech. Rep. NRS-P-24. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 552-558.
• Ponder, Felix, Jr.; Eivazi, Frieda. 2008. Activities of five enzymes following soil disturbance and weed control in a Missouri forest. Journal of Environmental Monitoring and Restoration. 5(1): 68-76.
• Ponder, Felix Jr. 2007. Productivity of planted shortleaf pine in artificially compacted Clarksville soil. In: Kabrick, John M.; Dey, Daniel C.; Gwaze, David, eds. Shortleaf pine restoration and ecology in the Ozarks: proceedings of a symposium; 2006 November 7-9; Springfield, MO. Gen. Tech. Rep. NRS-P-15. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 158-164.
• Fleming, Robert L.; Powers, Robert F.; Foster, Neil W.; Kranabetter, J. Marty; Scott, D. Andrew; Ponder, Felix Jr.; Berch, Shannon; Chapman, William K.; Kabzems, Richard D.; Ludovici, Kim H.; Morris, David M.; Page-Dumroese, Deborah S.; Sanborn, Paul T.; Sanchez, Felipe G.; Stone, Douglas M.; Tiarks, Allan E. 2006. Effects of organic matter removal, soil compaction, and vegetation control on 5-year seedling performance: a regional comparison of long-term soil productivity sites. Canadian Journal of Forest Research. 36: 529-550.
• Page-Dumroese, Deborah S.; Jurgensen, Martin F.; Tiarks, Allan E.; Ponder, Felix; Sanchez, Felipe G.; Fleming, Robert L.; Kranabetter, J. Marty; Powers, Robert F.; Stone, Douglas M.; Elioff, John D.; Scott, D. Andrew. 2006. Soil physical property changes at the North American long-term soil productivity study sites: 1 and 5 years after compaction. Can. J. For. Res., Vol. 36: 551-564
• Page-Dumroese, Deborah S.; Jurgensen, Martin F.; Tiarks, Allen E.; Ponder, Felix; Sanchez, Felipe G.; Fleming, Robert L.; Kranabetter, J. Marty; Powers, Robert F.; Stone, Douglas M.; Elioff, John D.; Scott, D. Andrew. 2006. Soil physical property changes at the North American long-term soil productivity study sites: 1 and 5 years after compaction. Canadian Journal of Forest Research. 36(3): 551-564
• Ponder, Felix, Jr. 2005. Effect of soil compaction and biomass removal on soil CO₂ efflux in a Missouri forest. Communications in Soil Science and Plant Analysis 36:1301-1311
• Ponder, Felix, Jr.; Jones, James E.; Mueller, Rita. 2005. Using poultry litter in black walnut nutrient management. Journal of Plant Nutrition 28:1355?1364
• Geyer, Wayne A.; Ponder, Felix, Jr. 2004. Site relationships and black walnut height growth in natural stands in eastern Kansas. In: Michler, C.H.; Pijut, P.M.; Van Sambeek, J.W.; Coggeshall, M.V.; Seifert, J.; Woeste, K.; Overton, R.; Ponder, F., Jr., eds. Proceedings of the 6th Walnut Council Research Symposium; Gen. Tech. Rep. NC-243. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 77-80
• Hammons, Brian; Ponder, Felix, Jr.; Rickman, John. 2004. Beyond the wild nut: moving toward profitable black walnut nut crops . In: Michler, C.H.; Pijut, P.M.; Van Sambeek, J.W.; Coggeshall, M.V.; Seifert, J.; Woeste, K.; Overton, R.; Ponder, F., Jr., eds. Proceedings of the 6th Walnut Council Research Symposium; Gen. Tech. Rep. NC-243. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 156-160
• Michler, C. H.; Pijut, P.M.; Van Sambeek, J.; Coggeshall, M.; Seifert, J.; Woeste, K.; Overton, R.; Ponder, F., Jr., eds. 2004. Black walnut in a new century, proceedings of the 6th Walnut Council research symposium; 2004 July 25-28; Lafayette, IN.. Gen. Tech. Rep. NC-243. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 188 p.
• Ponder, Felix Jr. 2004. Soil Compaction Affects Growth of Young Shortleaf Pine Following Litter Removal and Weed Control in the Missouri Ozarks. In: Yaussy, Daniel A.; Hix, David M.; Long, Robert P.; Goebel, P. Charles, eds. Proceedings, 14th Central Hardwood Forest Conference; 2004 March 16-19; Wooster, OH. Gen. Tech. Rep. NE-316. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station: 255-264.
• Ponder, Felix, Jr. 2004. Soils and nutrition management for black walnuts. In: Michler, C.H.; Pijut, P.M.; Van Sambeek, J.W.; Coggeshall, M.V.; Seifert, J.; Woeste, K.; Overton, R.; Ponder, F., Jr., eds. Proceedings of the 6th Walnut Council Research Symposium; Gen. Tech. Rep. NC-243. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 71-76
• Ponder, Felix, Jr. 2004. Ecological regions and soil conditions in the Hoosier-Shawnee ecological assessment area. Gen. Tech. Rep. NC-244. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 267 p.
• Idol, Travis W.; Pope, Phillip E.; Ponder, Felix, Jr. 2003. N mineralization, nitrification, and N uptake across a 100-year chronosequence upland hardwood forests. Forest Ecology and Management 176:509-518
• Jordan, D.; Ponder, F., Jr.; Hubbard, V. C. 2003. Effects of soil compaction, forest leaf litter and nitrogen fertilizer on two oak species and microbial activity. Applied Soil Ecology 23(1):33-41
• Ponder, Felix, Jr. 2003. Effect of site treatments on soil temperature and moisture and oak and pine growth and nutrient concentrations. In: Van Sambeek, J. W.; Dawson, Jeffery O.; Ponder Jr., Felix; Loewenstein, Edward F.; Fralish, James S., eds. Proceedings of the 13th Central Hardwood Forest Conference; Gen. Tech. Rep. NC-234. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station: 213-222
• Ponder, Felix, Jr. 2003. Ten-Year Results of Tree Shelters on Survival and Growth of Planted Hardwoods. Northern Journal of Applied Forestry 20(3):104-108
• Ponder, Felix, Jr.; Jones, James E.; Mueller, Rita; Clark, Andrea. 2003. Nut Growers Hear It Pays to Care for Black Walnut. Walnut Council Bulletin 30(3):18-19
• Ponder, Jr., Felix ; Pope, Phillip E. 2003. Planting and care of fine hardwood seedlings: Regenerating hardwoods in the Central Hardwoods Region: Soils. FNR-211. Purdue University Department of Forestry and Natural Resources. 4 p.
• Van Sambeek, J.W.; Dawson, Jeffrey O.; Ponder, Felix Jr; Loewenstein, Edward F.; Fralish, James S. 2003. 13th Central Hardwoods Forest Conference. General Technical Report NC-234. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Research Station
• Idol, Travis W.; Pope, Phillip E.; Ponder, Felix. 2002. The Effects of Harvesting on Long-Term Soil Productivity in Southern Indiana Oak-Hickory Forests. In: Gen. Tech. Rep. SRS-48. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pg. 233-238
• Idol, Travis W.; Pope, Phillip E.; Ponder, Felix, Jr. 2002. Changes in Microbial Nitrogen Across a 100-Year Chronosequence of Upland Hardwood Forests. Soil Science Society of America Journal 66(5):1662-1668
• Ponder, Felix, Jr.; Jones, James E.; Mueller, Rita. 2001. Developing Management Techniques For Black Walnut to Stabilize the Annual Nut Supply. In: 92d Annual Report of the Northern Nut Growers Association; 2001 August 5-8; Cornell, NY. [Cornell, NY: Northern Nut Growers Association]: 60-69
• Idol, Travis W.; Pope, Phillip E.; Ponder, Felix Jr. 2000. Fine root dynamics across a chronosequence of upland temperate deciduous forests. Forest Ecology and Management. Volume 127. Issue 1-3. 2000. pp. 153-167
• Idol, Travis W.; Pope, Phillip E.; Figler, Rebecca A.; Ponder Jr., Felix. 1999. Characterization of coarse woody debris across a 100 year chronosequence of upland oak-hickory forest. 12th Central hardwood forest conference; 1999 February 28. Gen. Tech. Rep. Department of Agriculture, Forest Service, Southern Research Station: 60-67. (1999)
• Jordan, D.; Hubbard, V. C.; Ponder, F., Jr.; Berry, E. C. 1999. Effect of soil compaction and organic matter removal on two earthworm populations and some soil properties in a hardwood forest. Pedobiologia 43(1999): 802-807
• Idol, Travis W.; Pope, Phillip E.; Tucker, Jennifer; Ponder, Felix, Jr. 1998. The Role of Fine Root Dynamics in the N and P Cycles of Regenerating Upland Oak-Hickory Forests. In: Waldrop, Thomas A., ed. Proceedings, 9th Biennial Southern Silvicultural Research Conference; Gen. Tech. Rep. SRS-20. Asheville, NC: US Department of Agriculture, Forest Service, Southern Research Station: 136-140
• Idol, Travis W.; Pope, Phillip E.; Ponder, Felix, Jr. 1997. Changes in fine root dynamics and distribution along a chronosequence of upland oak-hickory forests. In: Pallardy, Stephen G.; Cecich, Robert A.; Garrett, H. Gene; Johnson, Paul S., eds. Proceedings of the 11th Central Hardwood Forest Conference; Gen. Tech. Rep. NC-188. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station: 170-171
• Ponder, Felix Jr.; Alley, Darrell E. 1997. Soil sampler for rocky soils.. Research Note NC-371. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
• Ponder, Felix, Jr. 1997. Survival and growth of hardwood seedlings following preplanting-root treatments and treeshelters. In: Pallardy, Stephen G.; Cecich, Robert A.; Garrett, H. Gene; Johnson, Paul S., eds. Proceedings of the 11th Central Hardwood Forest Conference; Gen. Tech. Rep. NC-188. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station: 332-340
• Spetich, Martin A.; Shifley, Stephen R.; Parker, George R.; Ponder, Felix, Jr. 1997. Ground cover in old-growth forests of the central hardwood region. In: Pallardy, Stephen G.; Cecich, Robert A.; Garrett, H. Gene; Johnson, Paul S., eds. Proceedings of the 11th Central Hardwood Forest Conference; Gen. Tech. Rep. NC-188. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station: 152-160
• Tiarks, Allan E.; Powers, Robert F.; Ragus, Jerry F.; Page-Dumroese, Deborah S.; Ponder, Felix, Jr.; Stone, Douglas M. 1997. North American long-term soil productivity research program. In: Communicating the role of silviculture in managing the national forests: Proceedings of the National Silviculture Workshop. 1997 May 19-22; Warren, PA.: Gen. Tech. Rep. NE-238. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 140-147.
• Tiarks, Allan E.; Powers, Robert F.; Ragus, Jerry F.; Page-Dumroese, Deborah S.; Ponder, Felix; Stone, Douglas M. 1997. North American long-term soil productivity research program. Proceedings of the National Silviculture Workshop; 1997 May 19-22; Warren, PA. Gen. Tech. Rep. NE-238. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station: 140-147.
• Kaczmarek, Donald J.; Rodkey, Karyn S.; Reber, Robert T.; Pope, Phillip E.; Ponder, Felix, Jr. 1995. Carbon and nitrogen pools in oak-hickory forests of varying productivity. In: Gottschalk, Kurt W.; Fosbroke, Sandra L. C., ed. Proceedings, 10th Central Hardwood Forest Conference; 1995 March 5-8; Morgantown, WV.: Gen. Tech. Rep. NE-197. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 79-93
• Ponder, Felix, Jr.; Mikkelson, Nancy M. 1995. Characteristics of a long-term forest soil productivity research site in Missouri. In: Gottschalk, Kurt W.; Fosbroke, Sandra L. C., ed. Proceedings, 10th Central Hardwood Forest Conference; 1995 March 5-8; Morgantown, WV.: Gen. Tech. Rep. NE-197. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 272-281
• Ponder, Felix Jr. 1994. Leguminous ground covers could reduce herbicide use in forestry.. Research Paper NC-316. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
• Ponder, Felix, Jr. 1993. Performance of hardwoods planted with autumn olive after removing prior cover. In: Gillespie, Andrew R.; Parker, George R.; Pope, Phillip E.; Rink, George: eds. Proceedings of the 9th Central Hardwood Forest Conference; Gen. Tech. Rep. NC-161. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station: 447-454
• Ponder, Felix Jr. 1988. Site Preparation. In: Burde, E. Lucy, ed. Walnut Notes. St. Paul, MN. U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. Note 2.02.
• Ponder, Felix Jr. 1988. Fertilization. Ponder, Felix, Jr. 1988. Fertilization. In Burde, E. Lucy, ed. Walnut Notes. St. Paul, MN. U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. : Note 2.07.
• Ponder, Felix Jr. 1988. Weed Control. Ponder, Felix, Jr. 1988. Weed Control. In Burde, E. Lucy, ed. Walnut Notes. St. Paul, MN. U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. : Note 2.05.
• Ponder, Felix Jr. 1988. Choosing a Good Walnut Site. Ponder, Felix, Jr. 1988. Choosing a Good Walnut Site. In Burde, E. Lucy, ed. Walnut Notes. St. Paul, MN. U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. : Note 2.01.
• Ponder, Felix Jr. 1988. Multicropping. Ponder, Felix, Jr. 1988. Multicropping. In Burde, E. Lucy, ed. Walnut Notes. St. Paul, MN. U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. : Note 2.1.
• Ponder, Felix Jr.; McBride, F. Danny. 1988. Irrigation. Ponder, Felix, Jr.; McBride, F. Danny . 1988. Irrigation. In Burde, E. Lucy, ed. Walnut Notes. St. Paul, MN. U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. : Note 2.08.
• Ponder, Felix Jr.; Schlesinger, Richard C. 1988. Releasing Walnut in Natural Stands. Ponder, Felix, Jr.; Schlesinger, Richard C. 1988. Releasing Walnut in Natural Stands. In Burde, E. Lucy, ed. Walnut Notes. St. Paul, MN. U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station. : Note 3.05.
• Van Sambeek, J.W.; Ponder, Felix Jr.; Rietveld, W.J. 1986. Legumes increase growth and alter foliar nutrient levels of black walnut saplings. Forest Ecology and Management. 17: 159-167.
• Ponder, Felix Jr.; Bey, Calvin F. 1981. Effect of Calcium Cyanamide on the Growth of Planted Hardwoods. Research Note NC-266. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
• Ponder, Felix Jr. 1980. Rabbits and Grasshoppers: Vectors of Endomycorrhizal Fungi on New Coal Mine Spoil. Research Note NC-250. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station
• Ponder, Felix Jr. 1979. Soil Structure and Mycorrhizae Encourage Black Walnut Growth on Old Fields. Research Note NC-249. St. Paul, MN: U.S. Dept. of Agriculture, Forest Service, North Central Forest Experiment Station