sNBI {NUETON}

Calculate N Balance Index of a System (sNBI)

Description

The accumulation or reduction of soil N over a set time. Calculate sNBI using the formula: sNBI = Ni - No - delSoilN

Usage

sNBI(Ni, No, delSoilN)

Arguments

Ni

Sum total of N inputs (enter each value individually)

No

Sum total of N outputs (enter each value individually)

delSoilN

Change in total soil N value

Value

The calculated ecoNUE 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: Sainju, U. M. (2017). Determination of nitrogen balance in agroecosystems. MethodsX 4, 199–208. doi: 10.1016/j.mex.2017.06.001

Examples

Ni <- c(2.92, 3.78, 4.68, 4.21)
No <- c(2.89, 3.66, 4.73, 4.16)
delSoilN <- 0.085
sNBI(Ni, No, delSoilN)