Improvement yield of sweet corn (Zea mays Saccharata (Sturt.) bailey using arbuscular mycorrhiza fungi (AMF) and cow manure fertilizer (CMF) on ultisol

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.