Research Article
Feasibility Study on the Use of a Portable NIR Spectrometer and Multivariate Data Analysis to Discriminate and Quantify Adulteration in Fertilizer
Figure 4
PCA score plot: (a) raw, (b) SNV, (c) SGFD, and (d) SGSD of fertilizer brand B.
(a) |
(b) |
(c) |
(d) |