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The Effects of Organic Surface Amendments on Soil Nutrients and Initial Tree Establishment

Description: This study examined the effects of replicating woodland soil surface horizonation on the nutrient status of underlying soils and the initial establishment and growth of trees. A total of 283 container grown trees were planted in a bufferzone around a future landfill site. Control amendments consisted of an 8 cm layer (0.5 m3) of wood chips applied in a circular area of 4.6 m2 around the trees' planting pit. For the treatment, a 2.5 cm layer of composted biosolids (0.15 m3 or 80 Mg/ha) was applied in a circular area of 4.6 m2 around the trees' planting pit followed by an 8 cm layer (0.5 m3) of wood chips. The results indicate that the replication of woodland soil surface attributes using composted biosolids can significantly improve the nutrient status of underlying soil. Some significant effects were seen under control conditions, too. However, the effects on tree establishment and growth parameters were, for the most part, not statistically significant.
Date: May 1999
Creator: Thuesen, Kevin (Kevin Andrew)
Partner: UNT Libraries

[Pool of Water]

Description: Photograph of a pool of water, surrounded by stone, inside a stone structure. The reflection in the water shows tree limbs against the sky; a path of stepping stones in visible in the background of the photo, through another opening in the structure.
Date: unknown
Partner: UNT Libraries Special Collections

[Biology Building and Chemistry Building exteriors]

Description: Photograph of the Biology Building (left) and the Chemistry Building (center) from the sidewalk in front of them. There are small plants lining the walk up to the Biology Building and larger shrubs and a tree in front of the Chemistry Building. Several cars and a truck are parked along the street in front of the two buildings.
Date: 197u
Location Info:
Partner: UNT Libraries Special Collections

[Biology Building and Chemistry Building from street]

Description: Photograph of the Biology Building (left) and the Chemistry Building (right) from the street in front of them. There are small plants lining the walk up to the Biology Building and larger shrubs and a tree in front of the Chemistry Building. There are some cars parked in front of the two buildings on the street.
Date: 197u
Location Info:
Partner: UNT Libraries Special Collections

[Information Science Library]

Description: Photograph of the Information Science Library from the lawn in front of it. Bushes line the base of the exterior wall and there are several trees on the grounds. Tied between one of the trees and a telephone pole is a sign announcing an upcoming event. Another sign is leaning against the same tree.
Date: 196u
Partner: UNT Libraries Special Collections

[Psychology Building entrance]

Description: Photograph of the Psychology Building entrance. A large staircase bordered by hedges leads up to the doors. A large tree stands in front of the stairs and a bush is beside them. A flagpole is standing at the top of the building.
Date: 197u
Location Info:
Partner: UNT Libraries Special Collections

[Journalism Building exterior]

Description: Photograph of the exterior of the Journalism Building. There are bushes around the entrance to the building and a bench is set up against the wall. Trees are growing further back along the building and cars are lined up parked on the curb.
Date: 196u
Location Info:
Partner: UNT Libraries Special Collections

[Bruce Hall north entrance]

Description: Photograph of the north entrance of Bruce Hall. The entrance is decorated with two lamps and shrubs are growing along the base of the walls. Above the doorway is a balcony with open doors. There are several trees by the building and cars are parked along the roadside in front of it.
Date: 197u
Location Info:
Partner: UNT Libraries Special Collections

[Bruce Hall from across street]

Description: Photograph of the north entrance of Bruce Hall. The entrance is decorated with two lamps and shrubs are growing along the base of the walls. There are several trees by the building and cars are parked along the roadside in front of it.
Date: 197u
Location Info:
Partner: UNT Libraries Special Collections

[Psychology Building exterior front]

Description: Photograph of the Psychology Building entrance. A large divided staircase bordered by hedges leads up to the doors. A large tree stands next to the stairs and other bushes are around them. A flagpole is standing at the top of the building.
Date: 197u
Location Info:
Partner: UNT Libraries Special Collections

[Administration Building from street]

Description: Photograph of the Administration Building. A flagpole is standing in front of the building. Three women are passing by the stairs leading to the building and another is standing on the curb. Cars are parked in the spots beside her and another is driving towards her. There is landscaping all around the building.
Date: 197u
Location Info:
Partner: UNT Libraries Special Collections

[Administration Building exterior]

Description: Photograph of the Administration Building. A flagpole is standing in front of the building and a man is walking down the steps. On the curb in front of the building a woman is standing, she is holding something in her hands. A car is parked in a spot beside her. There is landscaping in various places around the building.
Date: 197u
Location Info:
Partner: UNT Libraries Special Collections

[Psychology Building main entrance]

Description: Photograph of the Psychology Building main entrance. A large divided staircase bordered by hedges leads up to the doors. Trees are standing off to the sides of the stairs and other bushes are around them. A metal pole is attached to the top of the building.
Date: 197u
Location Info:
Partner: UNT Libraries Special Collections

[Business Administration Building and Psychology Building from sidewalk]

Description: Photograph of the corner of the Business Administration Building and the main entrance to the Psychology Building from the sidewalk that passes by both. Trees and bushes fill the space around the buildings and a man is walking away from them. A bike is leaning against one of the trunks. Something, possibly a string, is stretched across the frame, cutting the image into two parts.
Date: 196u
Location Info:
Partner: UNT Libraries Special Collections

[Historical Building from sidewalk]

Description: Photograph of the Historical Building from the sidewalk that passes in front of it. The entrance is an arch and is framed by two columns. Bushes are growing on both sides of the entrance walkway and a tree is covering part of the building from view.
Date: 196u
Location Info:
Partner: UNT Libraries Special Collections