Claim · model-written summary
Total sorghum grain yield over five seasons fitted a quadratic response curve with both application methods
- Treatment
- both application methodse3
- Outcome
- Total sorghum grain yieldse3
- Qualifier
- quadratic reponse curvee3
SorghumNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Emerald in central Queensland, dryland sorghum and sunflower were grown on a cracking clay soil (Vertisol)”
e3“Total sorghum grain yields after 5 seasons fitted a quadratic reponse curve (P<0.05) with both application methods”
Title
DE Hibberd; PS Want; MN Hunter; et al. Australian Journal of Experimental Agriculture 1991. doi:10.1071/ea9910099
Other claims from this paper (11)
- Intervention effect Sorghum DM yield at anthesis increased linearly with both P application methods
- Observation Significant sorghum treatment differences occurred only after the 18 months of fallow
- Intervention effect Sunflower DM yield at anthesis increased with broadcast fertiliser in the first season only
- Intervention effect Neither the rate nor the method of fertiliser application affected sunflower seed yield over 4 seasons
- Intervention effect Sorghum seed P concentration was unaffected or increased with increasing fertiliser rates
- Intervention effect Sunflower seed P concentration was unaffected or increased with increasing fertiliser rates
- Recommendation Fertiliser P may not be needed for sunflower
- Recommendation Banding about 70 kg P/ha with sorghum at sowing over 5 years is recommended for maximum yields
- Intervention effect Relative effectiveness of broadcast and incorporated P applications above 40 kg/ha declined over the first 4 years
- Intervention effect Relative effectiveness of P applications then remained steady at about 0.67
- Association No consistent trend in relative effectiveness over time at lower P rates