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Re-Integrating Crops And Livestock In Maine: An Economic Analysis Of The Potential For And Profitability Of Integrated Agricultural Production, Aaron K. Hoshide
Re-Integrating Crops And Livestock In Maine: An Economic Analysis Of The Potential For And Profitability Of Integrated Agricultural Production, Aaron K. Hoshide
Electronic Theses and Dissertations
This thesis examines the profitability of and sustainability indicators for potato and dairy farms in Maine integrating crops and livestock in two different ways. The first is inter-farm coupling, where two or more specialized producers are close enough to exchange manure applications for crops used as livestock feed. Land base is shared between farmers. The second is where farms are on-farm integrated. Here crops and livestock are raised on the same farm and manure is applied to cash crops and livestock feed crops. Face-to-face interviews with Maine producers were used to construct integrated and non-integrated representative budgets. Assuming …
Dynamics Of Bee And Wasp Populations In Maine Lowbush Blueberry (Vaccinium Angustifolium), Joseph E. Karem
Dynamics Of Bee And Wasp Populations In Maine Lowbush Blueberry (Vaccinium Angustifolium), Joseph E. Karem
Electronic Theses and Dissertations
Conservation of natural enemies can be an effective form of pest management. If beneficial Hymenoptera, native to the area, can be protected and encouraged to multiply, the benefits of natural insect pest control might be realized. Hymenoptera as "natural enemies" as well as "pollinators" have been studied intensively in many agroecosystems worldwide. However, lowbush blueberry is not an ecosystem where ecology of Hymenoptera has been well studied. This thesis discusses two studies conducted in lowbush blueberry fields in Washington County, Maine in 1997 and 1998. In the first study, I investigated "towers" as a method for deploying insect traps along …
Age-Related Trends In Red Spruce Needle Anatomy And Their Relationship To Declining Productivity, Margaret H. Ward
Age-Related Trends In Red Spruce Needle Anatomy And Their Relationship To Declining Productivity, Margaret H. Ward
Electronic Theses and Dissertations
Many species of trees undergo predictable age-related changes in foliar morphology and physiology. Age-related declines in photosynthetic rates, which may lead to decreases in productivity, have been described for numerous species. However, the physiological basis for these phenomena is unclear, as are linkages between agerelated trends in morphology/anatomy and physiology. Photosynthetic capacity in red spruce (Picea rubens Sarg.) may result from increased mesophyll resistance to CO2 uptake in older trees. Additional studies with other species imply that the foliage of older trees may have a lower ratio of photosynthetic to non-photosynthetic tissue and a larger proportion of xylem to leaf …
Revegetating Blackwoods Campground, Acadia National Park: Emphasis On Natural Regeneration Of Red Spruce And Balsam Fir, Cristin O'Brien
Revegetating Blackwoods Campground, Acadia National Park: Emphasis On Natural Regeneration Of Red Spruce And Balsam Fir, Cristin O'Brien
Electronic Theses and Dissertations
Blackwoods Campground in Acadia National Park has a declining vegetative understory, characterized by a lack of tree seedling recruitment and shrub populations. This project was embarked upon to identify limiting factors to tree seedling establishment and shrub survival. From these studies, management plans will be developed for revegetating the campground understory. To better understand the factors that inhibit successful seedling establishment, we investigated the effects of varying soil moisture levels on seed germination, seedling survival and seedling dry mass accumulation for red spruce and balsam fir. We also studied the effect of organic layer depth on seedling growth for both …