| NBI {NUETON} | R Documentation |
Calculate N Balance Intensity (NBI)
Description
The difference between fertilizer N applied and the N removed as yield; commonly called N surplus.
Calculate NBI using the formula: NBI = YieldN-FertN
Usage
NBI(YieldN, FertN)
Arguments
YieldN |
A numeric vector of the N removed as yield values. |
FertN |
A numeric value for fertilizer N input. |
Value
The calculated NBI value.
References
Primary: Congreves, K. A., Otchere, O., Ferland, D., Farzadfar, S., Williams, S., & Arcand, M. M. (2021, June 4). Nitrogen Use Efficiency Definitions of Today and Tomorrow. Frontiers in Plant Science, 12. https://doi.org/10.3389/fpls.2021.637108
Secondary: IPNI (2014). Nutrient Performance Indicators: The Importance of Farm Scale Assessments, Linked to Soil Fertility, Productivity, Environmental Impact and the Adoption of Grower Best Management Practices. Available online at: http://anz.ipni.net/ipniweb/region/anz.nsf/0/9312A2172A0B917CCA257E8E007219B4/$FILE/IssueReviewPerfInd081114.pdf
Examples
YieldN <- c(5.4, 6.3, 4.8, 7.2)
FertN <- 1.5
NBI(YieldN, FertN)