P. S., Anju, John Susan, and Ray S. B. 2020. “Weighted Average Method in Evolving the Nutrient Status of Soils Under Cropping Systems Involving Tuber Crops in AEU 3 and AEU 9 of Kerala”. JOURNAL OF ROOT CROPS 45 (2):33-41. https://journal.isrc.in/index.php/jrc/article/view/561.