Plants are of fundamental importance to life on Earth. Diseases in plants cause major production and economic losses in agricultural industry worldwide. A good understanding of plants is necessary to improve agricultural productivity and sustainability. With the aim of increasing and diversifying income sources for farmers and providing alternative options to shifting cultivation, the Indian government is actively promoting the production of cash crops, most recently of which is soybeans. The present review explores various diseases on soybean crops and recognizes the need for developing a rapid, cost-effective, and reliable system for detecting diseases that would upgrade the agricultural sector. It describes the currently used technologies for assist in monitoring health and diseases in plants under field conditions. These technologies include spectroscopic and imaging-based, and volatile profiling-based plant, artificial neural network, machine vision ,using metadata and remote sensing and geospatial technology Site-specific crop management for agriculture field.