Claim · model-written summary
Fertilizer N increased stubble wheat yields by 7% in a 3-yr rotation
- Taxon
- wheat
Triticum aestivume5 - Treatment
- Fertilizer Ne4
- Outcome
- yields of wheat grown on stubblee5
- Direction
- increasede5
- Value
- 7%e5
- Qualifier
- 3-yr rotatione5
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Fertilizer N had no affect on yields of wheat grown on fallow because little N was required or applied”
e5“yields of wheat grown on stubble were increased 7% when grown in a 3-yr rotation and 17% when grown continuously”
Title
R. P. ZENTNER; C. A. CAMPBELL Canadian Journal of Plant Science 1988. doi:10.4141/cjps88-001
Other claims from this paper (19)
- Intervention effect Wheat yields on fallow were similar in 2-yr and 3-yr wheat rotations (1905 kg ha -1) when N and P fertilizers were applied by soil tests
- Intervention effect Wheat yields on N- and P-fertilized stubble were similar in 3-yr and continuous rotations (1379 kg ha -1)
- Intervention effect Stubble wheat yields were suppressed when wheat followed flax in a continuous-type rotation, through moisture competition from weeds; otherwise unaffected by the preceding crop
- Intervention effect Fertilizer N had no effect on yields of wheat grown on fallow
- Intervention effect Fertilizer N increased stubble wheat yields by 17% in continuous rotation
- Intervention effect P fertilizer increased fallow and stubble wheat yields by 11-12%
- Intervention effect Total wheat production was lowest in the fallow-wheat rotation (949 kg ha -1 yr -1)
- Intervention effect Total wheat production was intermediate in the fallow-wheat-wheat rotation (1105 kg ha -1 yr -1)
- Intervention effect Total wheat production was highest in continuous wheat (1354 kg ha -1 yr -1)
- Intervention effect Protein concentrations in fallow wheat were similar in 2-yr and 3-yr wheat rotations
- Intervention effect Protein concentrations in fallow wheat were generally higher than in stubble wheat, except on flax stubble
- Observation Fallow-wheat was the most profitable rotation when wheat prices were below $130.00 per t
- Observation Fallow-wheat and fallow-wheat-wheat gave the highest and about equal net return at wheat prices of $130.00-160.00 per t
- Observation Fallow-wheat-wheat gave the highest net return at wheat prices of $160.00-275.00 per t
- Observation Continuous wheat gave the highest net return at wheat prices above $275.00 per t
- Observation Cost of producing wheat was lowest in fallow-wheat ($88.00 per t)
- Observation Cost of producing wheat was intermediate in fallow-wheat-wheat ($94.00 per t)
- Observation Cost of producing wheat was highest in continuous wheat ($138.00 per t)
- Association Income variability and risk of financial loss decreased as the proportion of fallow in the rotation increased