Claim · model-written summary
High nitrogen application led to lower nitrogen use efficiency.
- Taxon
- rice
Oryza sativat0 - Treatment
- high N application levelse0
- Outcome
- N use efficiencye0
- Direction
- lowere0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high N application levels, which led to higher yields but lower N use efficiency”
t0“rice-based farming systems in Central Luzon”
Title
João Vasco Silva; Pytrik Reidsma; Ma. Lourdes Velasco; et al. Agricultural Systems 2018. doi:10.1016/j.agsy.2018.05.008
Other claims from this paper (15)
- Observation Irrigated fields and improved variety adoption increased over time.
- Observation A dry season rice crop became possible.
- Observation Direct seeding replaced transplanting and herbicides substituted hand weeding.
- Observation Rice yields and labor productivity increased.
- Observation Hired labor and rice sales increased with commercialization.
- Association Yield levels maximizing labor productivity and nitrogen use efficiency were about 25% below climatic potential in the wet season.
- Association Yield levels maximizing labor productivity and nitrogen use efficiency were about 35% below climatic potential in the dry season.
- Intervention effect Transplanting produced higher yields than direct seeding.
- Intervention effect Transplanting produced lower labor productivity than direct seeding.
- Intervention effect High nitrogen application led to higher yields.
- Association Yields maximizing gross margin were about 80% of climatic potential in both seasons.
- Association Nitrogen application per hectare was negatively associated with farm size.
- Association The timing of first fertilizer application was positively associated with household size.
- Association The timing of first fertilizer application was positively associated with parcel count.
- Observation The province at the irrigation system center had more intensive practices and better farm performance.