Jurnal Multidisiplin Madani (MUDIMA) Vol.2, No.1, 2022: 543-556 543 ( DOI: https://doi.org/10.54259/mudima.v2i1.368 ISSN-E: 2808-5639 https://journal.yp3a.org/index.php/mudima/index Corn Growth And Yield Due To Organic Fertilizers And Effective Microorganisms-4 (Em-4) Munazar 1* , Zurrahmi Wirda 2 , Jamidi 3 , Usnawiyah 4 Fakultas Pertanian, Universitas Malikussaleh ABSTRACT: This study aims to determine the effect of organic fertilizer and EM- 4 and the interaction between the two on the growth and yield of maize. The study used a factorial randomized block design. The experimental factors studied were the factor of giving organic fertilizer and the factor of giving EM-4. Observations included plant height, number of leaves, number of cobs per plant, weight of cobs per plant and weight of 100 seeds. The results showed that the manure treatment had a significant effect on plant height at the age of 6 WAP. EM4 treatment had a significant effect on the weight of the cobs per plant. There was a very significant interaction between the treatment of manure and EM4 on plant height at the age of 6 WAP and a significant interaction with the number of leaves at the age of 4 and 6 WAP. Keywords: corn, manure, effective microorganisms-4 (em-4) Corresponding author: zurrahmi.wirda@unimal.ac.id