From data to decisions: the use of explainable AI to forecast soybean yield in major producing countries

Accurate crop yield estimation is vital for global food security and trade. Despite the superior performance of deep learning (DL) models, their "black box" nature undermines trust in critical decision-making. Explainable artificial intelligence (XAI) improves transparency and interactivity, but the ability of XAI models to balance interpretability and predictive accuracy remains insufficiently assessed, limiting their broader application in real-world scenarios. This study proposes the XAI-Crop framework and, using major soybean-producing countries as case studies and a multi-country comparative experimental design, employs multi-source data to evaluate and compare the performance differences between the inherently interpretable DL model-Kolmogorov-Arnold Networks (KAN)-and Multilayer Perceptron (MLP) as well as Random Forest (RF) models. In small-sample settings, KAN achieves predictive accuracy and generalization comparable to MLP and RF while offering improved interpretability. Feature importance analysis reveals significant regional variability in yield-driving factors, with solar-induced chlorophyll fluorescence (SIF) consistently emerging as a highly sensitive predictor across all regions. These findings demonstrate the feasibility of XAI approaches, such as KAN, in bridging the gap between model accuracy and interpretability, paving the way for their integration into agricultural decision-support systems and contributing to sustainable agricultural development.