Integration of smartphone imagery with topographic parameters for soil organic carbon prediction in the Indo-Gangetic Plains: an interpretable machine learning approach. - Abhradip Sarkar; Pragati Pramanik Maity; Fitsum T. Teshome; V. K. Sehgal; Alka Arora; Md. Ashraful Haque; Bappa Das; Mrinmoy Ray; Siddhartho Shekhar Paul (Comput. Electron. Agric., 2026)