Wijaya, D.K.M.H., Suntari, R. and Syekhfani, S. 2022. Effect of Applying Several Types of Foliar Fertilizers on Total N and K Levels in Leaves and Production of Apple (Malus sylvestris Mill.) Rome Beauty Varieties in Batu. Contributions of Central Research Institute for Agriculture. 16, 4 (Oct. 2022), 104–111. DOI:https://doi.org/10.59651/cceria.v16i4.10.