# Determination of soil pH from Vis-NIR spectroscopy by extreme learning machine and variable selection: A case study in lime concretion black soil

> Research article (Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, 2022) · cited 47× · AI/ML

**Wikidata**: [openalex:W4290792233](https://www.wikidata.org/wiki/openalex:W4290792233)  
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