Dass, Anchal, A. K. Vyas, and Ramanjit Kaur. “Nitrogen Management in Precision Farming by Soil Plant Analyses Development Meter”. Indian Farming 63, no. 12 (September 21, 2015). Accessed November 3, 2025. https://epubs.icar.org.in/index.php/IndFarm/article/view/49673.