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B843: The Ecology, Economics, And Management Of Potato Cropping Systems: A Report Of The First Four Years Of The Maine Potato Ecosystem Project, A. Randall Alford, Francis A. Drummond, Eric R. Gallandt, Eleanor Groden, David A. Lambert, Matt Liebman, Michele C. Marra, Jeffrey C. Mcburnie, Gregory A. Porter, Bacilio Salas
B843: The Ecology, Economics, And Management Of Potato Cropping Systems: A Report Of The First Four Years Of The Maine Potato Ecosystem Project, A. Randall Alford, Francis A. Drummond, Eric R. Gallandt, Eleanor Groden, David A. Lambert, Matt Liebman, Michele C. Marra, Jeffrey C. Mcburnie, Gregory A. Porter, Bacilio Salas
Bulletins
The bulletin reports on the first four years of the Maine Potato Ecosystem Project, a long-term, multidisciplinary study of alternative crop management strategies. The study site is a 15-acre tract on the northern boundary of the University of Maine's Aroostook Farm in Presque Isle, Maine, divided into 96 main plots that are grouped into four blocks. Each block is an area where soil survey data show similar soil characteristics. Thus, given the same production inputs, the crop output is expected to be the same on each plot within a block. Within each block there are 24 plots to which the …
B753: The Uptake Of Nutrients By Katahdin Potatoes As Influenced By Soil Moisture Regimes And Rates Of Fertilization, Gurbachan Singh Kalra, Roland A. Struchtemeyer
B753: The Uptake Of Nutrients By Katahdin Potatoes As Influenced By Soil Moisture Regimes And Rates Of Fertilization, Gurbachan Singh Kalra, Roland A. Struchtemeyer
Bulletins
In Aroostook County, Maine, where the annual average rainfall is 35-40 inches, it is generalized by many that moisture is not a limiting factor in potato production. Weather data for Aroostook do, however, show frequent periods of low rainfall during the growing season, and these periods do cause temporary moisture deficiencies in the crop. Struchtemeyer, based on irrigation research in Maine, showed that the potato plant needs approximately 1 inch of water per week during the growing season. From the 1936 to 1955 Maine Weather Records, Pullen and Schrumpf (23) found that about 70 percent of the time, less than …
Tb85: A New Potato Scab Problem In Maine, F. E. Manzer, G. A. Mcintyre, D. C. Merriam
Tb85: A New Potato Scab Problem In Maine, F. E. Manzer, G. A. Mcintyre, D. C. Merriam
Technical Bulletins
The scientific literature is filled with conflicting reports on the development of the common scab disease of potatoes and its causal organism. One unresolved question is soil reaction, once thought to be the answer in controlling this disease. Scientific studies an d practical experience over a long period had shown that acid soils having a pH of approximately 5.3 or below usually did not support common scab development, though sporadic and unexplained reports of disease occurrence in these soils were observed. In the late 1950s, however, such reports became more frequent in Maine and before the mid-1960s, losses relate d …
Tb56: Effects Of Differing Abundance Levels Of Aphids And Of Certain Virus Diseases Upon Yield And Virus Disease Spread In Potatoes, W. A. Shands, Geddes W. Simpson, Barbara A. Seaman, F. S. Roberts
Tb56: Effects Of Differing Abundance Levels Of Aphids And Of Certain Virus Diseases Upon Yield And Virus Disease Spread In Potatoes, W. A. Shands, Geddes W. Simpson, Barbara A. Seaman, F. S. Roberts
Technical Bulletins
In eight years during the period 1944 to 1954, a study was conducted on Aroostook Farm, Presque Isle, Maine, to develop ways of obtaining and maintaining varying levels of aphid abundance on potato plants. Methods for measuring aphid abundance and their effects on yield and virus transmission were devised. These techniques were then used to determine the effects of varying all-season levels of abundance of the aphids and of virus reservoirs of two potat o diseases upon yield of potatoes and the spread of leaf roll and spindle tuber in four varieties of potatoes. The results of that study are …
Tb5: Effects Of Factorially Combined Levels Of Sulfur And Magnesium On Potato Plants (Solanum Tuberosum), Harold W. Gausman, George O. Estes
Tb5: Effects Of Factorially Combined Levels Of Sulfur And Magnesium On Potato Plants (Solanum Tuberosum), Harold W. Gausman, George O. Estes
Technical Bulletins
Katahdin potatoes were grown in the greenhouse in 2-gallon, crocks containing a virgin Caribou loam soil. Factorially combined levels of S and Mg, each at an equivalent rate of 0, 10, 20, and 30 pounds per acre, were imposed as treatments for the first five of seven crops. The sixth and seventh crops of potatoes were grown primarily to further deplete the soil of S and Mg and to enhance or accentuate plant deficiency symptoms which occurred quite intensively during growth of the fifth crop of potatoes. The objective was to evaluate effects of factorially combined levels of sulfur and …
Tb3: Studies Concerning Effects Of Chloride And Potassium On The Nutrition Of Potato Plans, Solanum Tuberosum, Harold W. Gausman
Tb3: Studies Concerning Effects Of Chloride And Potassium On The Nutrition Of Potato Plans, Solanum Tuberosum, Harold W. Gausman
Technical Bulletins
To evaluate the premise that Cl- and other anions might influence tuber quality by affecting the esterification of inorganic phosphorus and subsequent energy transformations involving metabolic processes of carbohydrate synthesis or degradation, the author studied the effects of Cl ~ in relation to cations and anions on nutrient uptake and inorganic phosphorus transformations.