Claim · model-written summary
When established together, more Holcus growth accompanied an almost equal decrease in barley yield.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Outcome
- yield of barleye0
- Direction
- falling offe0
- Qualifier
- start togethere0
HolcusVerbatim
e0“Where the crop and the weed start together and so compete on equal terms, any increase of Holcus growth is obtained at the cost of an almost equal falling off in the yield of barley, showing that the respective plant growths are almost complementary.”
Title
HAROLD H. MANN; T. W. BARNES Annals of Applied Biology 1947. doi:10.1111/j.1744-7348.1947.tb06361.x
Other claims from this paper (13)
- Observation H. mollis produced about 2 1/2 tons of dry rhizomes and roots per acre after 10 months near Woburn.
- Observation The H. mollis rhizome growth was confined to the upper 8 inches of soil.
- Observation H. mollis commonly increased to the stated root occupancy range.
- Observation H. mollis was slightly superior to barley in use of available nitrogen.
- Observation Early, dense barley could completely smother Holcus.
- Observation Early, dense barley sustained no yield loss from Holcus.
- Observation Denser barley sowing limited the yield reduction from Holcus when both started together.
- Observation Even with the thickest simultaneous sowing, Holcus reduced barley yield by one third.
- Observation Previously established Holcus eliminated thinly planted barley.
- Observation Densely planted barley retained 50% yield against established Holcus.
- Observation Additional weed units did not change growth of well established sparse barley.
- Observation Full soil occupation by Holcus nearly completely suppressed barley growth.
- Observation Barley and Holcus mutually reduced growth even with ample root space and nutrients.