Claim · model-written summary
Some excess nitrogen was found in the soil profile.
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Part of the excess N (not taken up by the crop) was accounted for in the soil profile”
e1“inbred maize (Zea mays L.) lines”
Title
Cover crop and nitrogen fertilizer influence on inbred maize performance and soil nitrogen
Ada Vilches-Ortega; David Sotomayor-Ramírez; Johanis Rivera-Zayas; et al. The Journal of Agriculture of the University of Puerto Rico 2022. doi:10.46429/jaupr.v106i1.21051
Other claims from this paper (11)
- Intervention effect Cowpea cover cropping did not affect maize yield.
- Intervention effect Fertilizer nitrogen affected seed yield in two of three years.
- Observation Optimum seed yield was 7,034 kg/ha at 135 kg N/ha fertilizer.
- Observation Optimum seed yield was 4,708 kg/ha at 90 kg N/ha fertilizer.
- Intervention effect Residual soil nitrogen tended to increase with fertilizer and cover crop.
- Association Net aboveground nitrogen balance increased with successive fertilizer levels.
- Observation The fallow nitrogen balance reached +516 kg N/ha.
- Observation The cover crop nitrogen balance reached +621 kg N/ha.
- Intervention effect The cover crop rotation gave a slightly greater positive nitrogen balance at higher fertilizer rates.
- Recommendation The authors recommend cowpea cover cropping for long-term nitrogen recycling.
- Recommendation The authors recommend 90 to 135 kg N/ha, adjusted using soil inorganic nitrogen knowledge.