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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of Variation in black cherry crown health: Left-- a healthy tree; Right--an unhealthy declining tree. Robert Long, U.S. Department of Agriculture Forest Service.
ID: 1159
Black Cherry Crown Health and Mortality on the Allegheny National Forest

Black cherry, an important timber and wildlife species in the Allegheny hardwood forest, is suffering from poor crown health and increased morta ...

Principal Investigator : Robert P. Long

Resource Management and Use2016NRS
Photo of Upper panel: Black cherry raceme with individual flowers. Robert Long, USDA Forest Service
Lower panel: Mature black cherry seed at the base of a tree in fall 2010
ID: 1244
Black cherry regeneration difficulties: Are They Related to Stand Age or Something Else?

Forest managers report that black cherry regeneration is impeded by poor and erratic seed production. Tree stand age has been suggested as one o ...

Principal Investigator : Robert P. Long

Resource Management and Use
Water, Air, and Soil
2017NRS
Photo of This black cherry seedling is infected with black cherry leaf spot. Managers and scientists have observed this infection more frequently in recent years. Robert Long, U.S. Department of Agriculture Forest Service.
ID: 1086
Changes in Black Cherry on the Allegheny Plateau

Increased tree mortality, decreased seed production, and seedling growth. Managers and scientists have been observing these changes in black che ...

Principal Investigator : Robert P. Long

Inventory and Monitoring
Resource Management and Use
Water, Air, and Soil
2016NRS
Photo of Soil pit with golf tees marking horizons to be sampled. Robert Long, USDA Forest Service
ID: 650
Liming Effects Help Maintain Sugar Maple Growth and Health and Persist for More Than 20 years

Long-term inputs of acidic deposition have depleted soils of calcium (Ca) and magnesium (Mg) on ridge-top, unglaciated sites in Pennsylvania. Su ...

Principal Investigator : Robert P. Long

Water, Air, and Soil
Resource Management and Use
2014NRS
Photo of Lime application in 1985. USDA Forest Service
ID: 760
Long-Term Effects of Forest Liming on Soil, Soil Leachate, and Foliage Chemistry in Northern Pennsylvania

In many areas of the northeastern United States and Canada, base cations have been depleted by long-term inputs of acidic deposition. Forest lim ...

Principal Investigator : Robert P. Long

Water, Air, and Soil2015NRS
Photo of Photo 1:  Reid Garrison in a regenerating stand where black cherry seedlings are thriving after a nitrogen fertilizer treatment.
Photo 2:  Figures show increased species diversity in fertilizer treated stands.
ID: 1261
Using fertilizer to promote diverse seedling development in Allegheny hardwood forests

Fertilizing the forest understory slows the development of dominance by sweet birch, favors development of black cherry following overstory remo ...

Principal Investigator : Robert P. Long

Resource Management and Use
Water, Air, and Soil
2017NRS