The Effect of Foliar Spraying with The Nano Fertilizer Optimus-plus on The Growth and Yield of Four Varieties of Kohlrabi. nabatia [Internet]. 2024 June 30 [cited 2026 Nov. 7];12(1):55-68. Available from: https://nabatia.umsida.ac.id/index.php/nabatia/article/view/1638