 Corresponding author: Halim Department of Agrotechnology, Faculty of Agriculture, Halu Oleo University, Southeast Sulawesi, Kendari, Indonesia. Copyright © 2021 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0. Improvement yield of sweet corn (Zea mays Saccharata (Sturt.) bailey using arbuscular mycorrhiza fungi (AMF) and cow manure fertilizer (CMF) on ultisol Halim 1, * , Laode Sabaruddin 1 , La Ode Santiadji Bande 2 , Yulius Bara Pasolon 3 , Fransiscus Suramas Rembon 3 and Sahta Ginting 3 1 Department of Agrotechnology, Faculty of Agriculture, Halu Oleo University, Southeast Sulawesi, Kendari, Indonesia. 2 Department of Plant Protection, Faculty of Agriculture, Halu Oleo University, Southeast Sulawesi, Kendari, Indonesia. 3 Department of Soil Science, Faculty of Agriculture, Halu Oleo University, Southeast Sulawesi, Kendari, Indonesia. World Journal of Advanced Research and Reviews, 2021, 09(03), 304–308 Publication history: Received on 14 February 2021; revised on 17 March 2021; accepted on 20 March 2021 Article DOI: https://doi.org/10.30574/wjarr.2021.9.3.0108 Abstract This study aims to determine the effectiveness of arbuscular mycorrhiza fungi and cow manure to yield of sweet corn on Ultisol. This research was conducted using a randomized block design (RCBD) in a factorial pattern. The first factor is arbuscular mycorrhizal fungi (AMF) which consists of four levels, namely without AMF (A0), AMF 5 g/planting hole (A1), AMF 10 g/planting hole (A2), AMF 15 g/planting hole (A3). The second factor is cow manure fertilizer (CMF) consisting of three levels, namely without CMF (B0), CMF 5 tons ha-1 (B1), CMF 10 tons ha-1 (B2). The treatment applied consisted of 12 treatment combinations which were repeated in 3 replications, so that there were 36 experimental units. The observed variables were: weight of cob with cob, weight of cob without cob, cob length, ear diameter, number of rows of seeds and crop production (ton ha-1). The results showed that the highest average weight cob with husk was obtained in a combination treatment of AMF 10 g/planting hole and without CMF (A2B0) as 289.2 g. The highest average corn crop productivity was obtained in the combination of treatment without AMF and CMF 5 tons ha-1 (A0B1) as 8.52 tons ha-1. Keywords: Sweet corn; Arbuscular mycorrhizal fungi; Cow manure fertilizer; Ultisol 1. Introduction Sweet corn is a food plant that is very beneficial for humans for a variety of basic needs, industrial raw materials and animal feed. Sweet corn is a horticultural crop that has high economic value, because it can be cultivated every planting season with a relatively short production life when compared to other types of corn. According to [1]when a thumbnail is pressed into a kernel, a milky liquid should emerge indicating the crop is ready for harvest. Sweet corn food products can be processed in the form of fresh preparations such as boiled corn, cakes, chips, corn pudding, corn pancakes and other processed corn products. Nuryadin et al. [2] reported that’s sweet corn is an agricultural commodity that is very popular with the community because it contains a lot of nutrients and has economic value. According to [3], sweet corn has economic value in seeds, leaves, stems, panicles and cobs that can be used in a variety of food products and by- products. Result research Siyuan et al. [4], that’s corn nutrients and phytochemicals include vitamins (A, B, E, and K), minerals (Mg, P, and K), phenolic acids (ferulic acid, coumaric acid, and syringic acid), carotenoids and flavonoids (anthocyanins), and dietary fiber. Continuous uptake of the same nutrients from the soil and excessive application of inorganic fertilizers cause environmental pollution, decreased land productivity, and land degradation or decreased soil fertility which results in