Claim · model-written summary
Removing herbaceous competition increased four-year walnut diameter growth by 153%.
- Taxon
- walnut treese0
- Treatment
- Elimination of 90% of the herbaceous competitione0
- Interactor
- herbaceous competitione0weed
- Outcome
- diametere0
- Direction
- increasede0
- Value
- 153e0
Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleComparatorSettingQualifier
Verbatim
e0“Elimination of 90% of the herbaceous competition increased 4-year diameter and height growth of the walnut trees by 153 and 222%, respectively”
Title
Revitalizing a Black Walnut Plantation Through Weed Control and Fertilization
F. W. von Althen The Forestry Chronicle 1985. doi:10.5558/tfc61071-2
Other claims from this paper (7)
- Intervention effect Removing herbaceous competition increased four-year walnut height growth by 222%.
- Intervention effect Fertilization combined with weed control further increased walnut diameter and height growth.
- Association Nitrogen response did not scale with fertilizer dose.
- Intervention effect Fertilization did not improve growth significantly beyond weed control alone.
- Intervention effect All treatments raised walnut leaf nitrogen content substantially.
- Observation Treated plots retained higher foliar nitrogen than controls four years after treatment.
- Mechanism The authors identify nitrogen competition from broadleaf weeds and grasses as a major cause of walnut growth stagnation.