Amala K paul, Akshara R, Arunachalam G, Lavanya K, and Samson S. 2024. “Agriculture Soil Testing And Nutrient Spraying Machine- An Inference With Esp-32 Wroom Microcontroller”. Educational Administration: Theory and Practice 30 (9):877-88. https://doi.org/10.53555/kuey.v30i9.9657.