Claim · model-written summary
Since 1983, LW rotations gave lower mean grain protein and total N uptake than CW.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- LW rotationse5
- Outcome
- mean grain protein and total N uptakee5
- Direction
- lowere5
- Qualifier
- Since 1983e5
- Comparator
- CWe5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Long term effects of rotation, tillage and stubble management on wheat production in southern NSW”
e5“Since 1983, LW rotations consistently produced higher mean grain yields than CW, but mean grain protein and total N uptake were lower”
Title
Long term effects of rotation, tillage and stubble management on wheat production in southern NSW
DP Heenan; AC Taylor; BR Cullis; et al. Australian Journal of Agricultural Research 1994. doi:10.1071/ar9940093
Other claims from this paper (13)
- Intervention effect From 1979 to 1983, N fertilizer gave a negative grain yield response compared with continuous wheat without N fertilizer.
- Intervention effect From 1979 to 1983, a legume in rotation gave no grain yield response except in the 1982 drought.
- Observation In the 1982 drought, low yields were recorded from LW rotations.
- Intervention effect From 1984 to 1989-1990, N fertilizer usually gave a positive grain yield response in WW rotations.
- Intervention effect Legume rotations gave higher average grain yields than WW with added N fertilizer.
- Intervention effect Since 1983, LW rotations gave higher mean grain yields than CW.
- Observation The second wheat crop in a LWW rotation showed little carryover of benefits from the lupins.
- Intervention effect Direct drilling gave slightly higher mean grain yield and harvest index than cultivation before sowing, following lupins or sub-clover.
- Intervention effect Direct drilling gave lower mean grain protein than cultivation before sowing, following lupins or sub-clover.
- Intervention effect Retaining stubble rather than burning in autumn consistently reduced grain yields.
- Intervention effect Early burial of wheat stubble after summer rain did not improve grain yield or total N uptake compared with autumn incorporation.
- Observation Giant brome grass and disease build-up occurred where stubble was retained and crops were direct-drilled.
- Observation Aluminium toxicity symptoms appeared in these crops in 1989 and 1990.