Pengaruh Kombinasi Pupuk Kandang Sapi dan Pupuk NPK terhadap Pertumbuhan dan Hasil Tanaman Kubis (Brassica oleraceae L.): The Combination Effects of Cow Manure and NPK Fertilizer on Cabbage’ (Brassica oleraceae L.) Growth and Yield (University of Darussalam Gontor, Ponorogo, East Java Indonesia, 2024)