Claim · model-written summary
Herbaceous cover and biomass were greater on topsoil than overburden in 1989 and 1993.
- Taxon
- herbaceouse0
- Treatment
- standard topsoile0
- Outcome
- canopy cover and total aboveground live biomasse0
- Direction
- greatere0
- Qualifier
- 1989 and 1993e0
- Comparator
- gray cast overburdene0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValue
Verbatim
e0“Total herbaceous canopy cover and total aboveground live biomass were greater on standard topsoil than on gray cast overburden in 1989 and 1993”
Title
D. A. Kost; J. P. Vimmerstedt Journal American Society of Mining and Reclamation 1994. doi:10.21000/jasmr94030295
Other claims from this paper (19)
- Intervention effect Herbaceous cover and biomass were greater on overburden than topsoil in 1992.
- Intervention effect Legumes were generally more abundant on cast overburden than topsoil surfaces until 1993.
- Observation Total cover peaked at 84% in July 1989 following nitrogen application.
- Observation Total biomass peaked at 239 g/0.5 m 2 in July 1989.
- Intervention effect Ground cover and biomass were lower at the lowest nitrogen rate in 1989 only.
- Intervention effect Seed mix type did not affect ground cover growth.
- Intervention effect Seed mix type did not affect tree growth.
- Observation Overall tree survival fell from 82.0% in year one to 40.6% after five years.
- Observation pine survival was 3.5% after five years.
- Observation oak survival was 22.2% after five years.
- Observation maple survival was 38.5% after five years.
- Observation ash survival was 98.1 % after five years.
- Intervention effect White ash was taller on ripped topsoil than cast overburden.
- Intervention effect Silver maple survival was higher on topsoil than overburden.
- Intervention effect Red oak survived better on topsoil surfaces than overburden.
- Intervention effect Maple survival was higher at intermediate than low nitrogen rate.
- Intervention effect Oak survival was higher at intermediate than low nitrogen rate.
- Intervention effect High nitrogen did not reduce tree survival.
- Mechanism Herbicide control of ground cover and high rainfall may explain the absence of nitrogen harm to tree survival.