Claim · model-written summary
Soil below 30 cm had no significant nitrogen enrichment in either season.
- Taxon
- rice
Oryza sativat0 - Outcome
- 15 N enrichmente0
- Qualifier
- soil below 30 cme0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In neither the dry season nor the wet season was 15 N enrichment significant in soil below 30 cm”
t0“Wetland Rice Fields”
Title
Zhi‐hong Cao; S.K. De Datta; I.R.P Fillery Soil Science Society of America Journal 1984. doi:10.2136/sssaj1984.03615995004800010037x
Other claims from this paper (9)
- Intervention effect Point deep placement of urea supergranules left 4 to 5% of applied nitrogen unaccounted for after both crops.
- Intervention effect Broadcast and split prilled urea left 11 to 35% of applied nitrogen unrecovered at harvest.
- Intervention effect Uniform deep placement recovered 92–107% of labeled nitrogen.
- Intervention effect Band application produced 102% recovery in the dry season.
- Intervention effect Band application produced 61% recovery in the wet season.
- Observation After final harvest, 22 to 56% of applied urea nitrogen remained in soil.
- Observation The wet season crop took up about 5% of initial applied nitrogen from residual labeled soil nitrogen across treatments.
- Intervention effect Recovery of residual soil nitrogen was highest with supergranules and lowest with split urea.
- Association Residual soil nitrogen distribution reflected the urea placement pattern.