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
Dalton, T.J., G.A. Porter, and N.
Winslow. 2004. Risk management strategies in humid production
regions: a 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.
Grandy, A.S., G.A. Porter, and M.S. Erich. 2002. Organic amendment
and rotation crop effects on the recovery of soil organic matter and
aggregation in potato cropping systems. Soil Sci Soc Am J
66:1311-1319.
Erich, M.S., C.B. Fitzgerald, and G.A. Porter. 2002. Effect of
organic amendments on phosphorus chemistry in a potato cropping
system. Agriculture, Ecosystems, and Environ. 88:79-88.
Grandy, A.S., M.S. Erich, and G.A. Porter. 2000. Suitability of the
anthrone-sulfuric acid reagent for determining water soluble
carbohydrates in soil water extracts. Soil Biol & Biochem
32:725-727.
Porter, G.A., G.B. Opena, W.B. Bradbury, J.C. McBurnie, and J.A.
Sisson. 1999. Soil management and supplemental irrigation effects on
potatoes: I. Soil properties, tuber yield, and quality. Agron J 91:
416-425.
Opena, G.B. and G.A., Porter. 1999. Soil management and supplemental
irrigation effects on potatoes: II. Root growth. Agron J 91:426-431.
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