Knowledge-guided machine learning model with soil moisture for corn yield prediction under drought conditions

• URL: http://arxiv.org/abs/2503.16328v1
• Date: Thu, 20 Mar 2025 16:52:25 GMT
• Title: Knowledge-guided machine learning model with soil moisture for corn yield prediction under drought conditions
• Authors: Xiaoyu Wang, Yijia Xu, Jingyi Huang, Zhengwei Yang, Zhou Zhang,
• Abstract summary: Remote sensing (RS) techniques have become a valuable tool for corn yield prediction.<n>Traditional process-based (PB) models are limited by fixed input features and struggle to incorporate large volumes of RS data.<n>Machine learning (ML) models are often criticized for being black boxes'' with limited interpretability.
• Score: 7.75600387348283
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Remote sensing (RS) techniques, by enabling non-contact acquisition of extensive ground observations, have become a valuable tool for corn yield prediction. Traditional process-based (PB) models are limited by fixed input features and struggle to incorporate large volumes of RS data. In contrast, machine learning (ML) models are often criticized for being ``black boxes'' with limited interpretability. To address these limitations, we used Knowledge-Guided Machine Learning (KGML), which combined the strengths of both approaches and fully used RS data. However, previous KGML methods overlooked the crucial role of soil moisture in plant growth. To bridge this gap, we proposed the Knowledge-Guided Machine Learning with Soil Moisture (KGML-SM) framework, using soil moisture as an intermediate variable to emphasize its key role in plant development. Additionally, based on the prior knowledge that the model may overestimate under drought conditions, we designed a drought-aware loss function that penalizes predicted yield in drought-affected areas. Our experiments showed that the KGML-SM model outperformed other ML models. Finally, we explored the relationships between drought, soil moisture, and corn yield prediction, assessing the importance of various features and analyzing how soil moisture impacts corn yield predictions across different regions and time periods.

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