Claim · model-written summary
Production risks and nutrient use efficiency varied significantly with season and soil type.
- Outcome
- production risks and nutrient use efficiencye0
- Qualifier
- season and soil typee0
- Setting
- Kenya, Rwanda, Tanzania and Ugandae0
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of data from 464 on-farm trials in Kenya, Rwanda, Tanzania and Uganda revealed significant variations in production risks and nutrient use efficiency with season and soil type”
t0“maize”
Title
Abednego Kiwia; David Kimani; Rebbie Harawa; et al. Experimental Agriculture 2022. doi:10.1017/s001447972200014x
Other claims from this paper (15)
- Intervention effect Recommended N and P fertilizers lowered production risks at most sites except Uganda.
- Intervention effect On Lixisols and Ferralsols, N and P fertilizer raised production risks three to fourfold.
- Observation Fertilizer production risks were much lower on five other soil types.
- Observation With recommended rates, probability of exceeding 3 t ha −1 was over 0.60 on Nitisols and Leptosols.
- Observation That probability was under 0.20 on Lixisols and Plinthosols.
- Observation N and P use efficiencies and value cost ratios were highest on Cambisols and lowest on Plinthosols.
- Association Value cost ratio increased linearly with N agronomic efficiency.
- Association Value cost ratio increased with P agronomic efficiency.
- Association Value cost ratio related less strongly to grain yield.
- Observation Long-term fertilizer profit occurred in 30% of Ugandan site-season combinations.
- Observation Long-term fertilizer profit occurred in 69% of Kenyan site-season combinations.
- Observation Long-term fertilizer profit occurred in 81% of Rwandan site-season combinations.
- Observation Long-term fertilizer profit occurred in 84% of Tanzanian site-season combinations.
- Observation N use efficiency patterns differed from P use efficiency patterns across soils.
- Recommendation The authors recommend targeting N and P fertilizers to soils where maize uses nutrients efficiently.