This document discusses the use of AI-enabled mobile apps for agricultural advisory and extension services. It provides several examples of major farming applications of such apps, including disease detection and diagnosis using image recognition, fertilizer recommendations based on crop leaf color analysis, soil and water studies using digital photos and sensors, crop readiness analysis, and tools for pest and disease monitoring and extension workers. It also discusses several Indian agricultural startups like Cropin, Fasal, and Intello Labs that are using AI technologies like machine learning, computer vision and IoT sensors to help farmers increase yields, reduce costs and optimize operations.