Faculty Directory
Dr. Greg Porter
Research Area:
Crop Management and Ecology
E-mail:
porter@maine.edu
Phone:
207-581-2943
Office:
114 Deering
Bio: Dr. Porter received his
B.S. (1980) and M.S. (1982) from the University of Maine. He
received his Ph.D. from the Penn State in 1985. He joined the
faculty in 1985 and is a Professor of Crop Management.
Current Research:
My research
interests are in crop and soil management, crop physiology, and
potato variety improvement. Soil management research has been a
long-term priority for me. I have an interest in developing
cropping systems which provide high yields and excellent crop
quality, while having positive impacts on soil quality. My research
in this area includes long-term studies on the impacts of organic
soil amendments (e.g. composts and manures) and crop rotations (e.g.
type of rotations crops and length of rotations) on soils and crop
productivity. These studies have demonstrated the effectiveness of
manures, composts, and longer rotation lengths at maintaining and/or
improving soil physical properties; however, each management choice
involves trade-offs and their benefits vary depending on the
climatic conditions. The positive and negative impacts of
supplemental irrigation of Maine potatoes has been an on-going
component of my research program. My research on potassium,
nitrogen, phosphorus, and micro-nutrient fertility programs has
provided information for growers to more efficiently management
their potato crops, while maximizing yields and quality. For
example, new information from my program shows that potassium must
be managed carefully to optimize the internal quality of potato
tubers for fresh market and processing uses. I also have worked on
fertility programs for canola and cereal grains. I also am an
active participant in local and regional potato variety improvement
research. Our goal is to select and commercialize new potato
varieties with improved pest resistance and marketability for
Eastern potato growers. My research in this area includes the
development of improved selection and evaluation procedures for
potato variety improvement.
Recent Publications
Sharifi, M., B.J. Zebarth, G.A.
Porter, D.L. Burton, and C.A. Grant. 2009. Soil mineralizable
nitrogen and soil nitrogen supply under two-year potato rotations.
Plant and Soil (In Press).
Sharifi, M., B.J. Zebarth, D.L. Burton, G.A. Porter, and C.A. Grant.
2008. Organic amendment history and crop rotation effects on soil
nitrogen mineralization potential and soil nitrogen supply in a
potato cropping system. Agronomy Journal 100:1562-1572.
Porter, G.A. et al. 2008. Eastern regional potato trials - 2007:
Summary of NE1014 Regional Project Field Testing of New Potato
Clones. Maine Agricultural and Forest Experiment Station
Miscellaneous Publication 760.
Porter, G.A. et al. 2008. Eastern regional potato trials - 2006:
Summary of NE1014 Regional Project Field Testing of New Potato
Clones. Maine Agricultural and Forest Experiment Station
Miscellaneous Publication 758.
Sharifi, M., B.J. Zebarth, D. L. Burton, C.A. Grant, G.A. Porter,
J.M. Cooper, Y. Leclerc, G. Moreau, and W.J. Arsnenault. 2007.
Evaluation of laboratory-based measures of soil mineral nitrogen and
potentially mineralizable nitrogen as predictors of field-based
indices of soil nitrogen supply in potato production. Plant Soil
301:203-214.
Mallory, E.B. and G.A. Porter. 2007. Potato yield stability under
contrasting soil management strategies. Agronomy J 99: 501-510.
Olanya, O. M., D.H. Lambert, and G.A. Porter. 2006. Effects of pest
and soil management systems on potato diseases. Amer J Potato Res
83:397-408.
Piper, A., M.S. Erich, G.A. Porter, and T.S. Griffin. 2006. Root
growth effects on soluble C and P in manured and non-manured soils.
Plant and Soil 283: 359-372.
De Jong, W.S., D.E. Halseth, B.B. Brodie, K.L. Perry, J.B. Sieczka,
B.J. Christ, G.A. Porter, K.M. Paddock, M.W. Peck, and R.L. Plaisted.
2006. Marcy, a chipping variety with resistance to common scab and
the golden nematode. Amer J Potato Res 83:189-193.
Porter, G.A. et al. 2006. Eastern regional potato trials - 2005:
Summary of NE1014 Regional Project Field Testing of New Potato
Clones. Maine Agricultural and Forest Experiment Station
Miscellaneous Publication 757.
Porter, G.A. et al. 2006. Eastern regional potato trials - 2004:
Summary of NE1014 Regional Project Field Testing of New Potato
Clones. Maine Agricultural and Forest Experiment Station
Miscellaneous Publication 756.
Porter, G.A. et al. 2006. Eastern regional potato trials - 2003:
Summary of NE1014 Regional Project Field Testing of New Potato
Clones. Maine Agricultural and Forest Experiment Station
Miscellaneous Publication 755.
Ganga, Z.N., G.A. Porter, D. Lambert, G. Sewell, and A. Bushway.
2005. Reeves Kingpin: A high yielding processing variety suitable
for fry processing. Amer J Potato Res 83:141-147
Stark, J.C. and G.A. Porter. 2005. Potato nutrient management in
sustainable cropping systems. Amer J Potato Res 82:329-338.
Alyokhin, A. G. Porter, E. Groden, and F. Drummond. 2005. Colorado
Potato Beetle response to soil amendments: A case in support of the
mineral balance hypothesis? Agric Ecosys & Env 109:234-244.
Ohno, T., T.S. Griffin, M. Liebman, and G.A. Porter. 2005. Chemical
characterization of soil phosphorus and organic matter in different
cropping systems in Maine, U.S.A. Agriculture, Ecosystems, and
Environment 105: 625-634.
Dalton, T.J., G.A. Dalton, T.J., G.A. Porter, and N. Winslow. 2004.
Risk management strategies in humid production regions:
comparison of supplemental irrigation and crop insurance. Agric and
Resource Econ Rev 33:173-185.
Griffin, T.S. and G.A. Porter. 2004. Altering soil carbon and
nitrogen stocks in intensively tilled two-year rotations. Biology
and Fertility of Soils 39:366-374.
Porter, G.A.,D.H. Lambert, A.A. Bushway, R.L. Plaisted, K.M.
Paddock, W.S. De Jong, and D.E. Halseth. 2004. Monticello: A
mid-season variety with good tuber appearance and chipping potential
from mid- to long-term storage. Amer J Potato Res 81:143-152.
Updated: 31 March 2009
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