Claim · model-written summary
N harvest index at the optimum rate was 0.55 kg kg-1.
- Taxon
- Upland rice
Oryza sativat0 - Outcome
- N harvest indexe0
- Value
- 0.55 kg kg-1e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain N concentration and N harvest index at EOR were 1.55 and 0.55 kg kg-1, respectively.”
t0“Upland rice”
Title
Upland rice response to nutrient application in Uganda
C. Kaizzi K.; Byalebeka J.; Semalulu O.; et al. African Journal of Plant Science 2014. doi:10.5897/ajps2014.1175
Other claims from this paper (13)
- Intervention effect Rice grain yield rose from 1.3 to 3.7 Mg ha-1 between 0 and 100 kg ha-1 N.
- Intervention effect Yield response to P was smaller than response to N.
- Intervention effect K application did not increase mean rice yield.
- Observation Economically optimal N rates ranged from 54 to 92 kg ha-1 depending on price ratio.
- Observation Economically optimal P rates ranged from 17 to 30 kg ha-1 depending on price ratio.
- Method / resource Equations were derived for N and P yield response, optimum rates and benefit-cost ratio.
- Observation Grain N concentration at the optimum rate was 1.55.
- Association N recovery efficiency declined with increasing N rate and was 0.75 at the optimum.
- Association Partial factor productivity declined with increasing N rate and was 41 at the optimum.
- Association Agronomic efficiency declined with increasing N rate and was 28 kg kg-1 at the optimum.
- Recommendation Authors concluded N fertilizer can be highly profitable for upland rice.
- Recommendation Authors concluded P fertilizer can be moderately profitable for upland rice.
- Recommendation Fertilizer investment planning should consider price ratio and investment capacity.