# Prediction of Nitrogen, Phosphorus, and Potassium Contents in Apple Tree Leaves Based on In-Situ Canopy Hyperspectral Reflectance Using Stacked Ensemble Extreme Learning Machine Model

> Research article (Journal of soil science and plant nutrition, 2021) · cited 16× · AI/ML

**Wikidata**: [openalex:W3202226220](https://www.wikidata.org/wiki/openalex:W3202226220)  
**Source**: https://4ort.xyz/entity/prediction-of-nitrogen-phosphorus-and-potassium-contents-in-apple-tree-leaves-based-on-in-situ-canopy-hyperspectral-refl