Claim · model-written summary
Fertilization did not improve growth significantly beyond weed control alone.
- Taxon
- black walnut
Juglans nigrat0 - Treatment
- Fertilizatione1
- Outcome
- greatere0
- Direction
- not significantly greatere0
- Comparator
- weed control onlye0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was not significantly greater than that obtained by weed control only”
e1“Fertilization with weed control further increased diameter and height growth”
t0“Black Walnut”
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 diameter growth by 153%.
- 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 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.