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Maize ( Zea mays L. ) is a very sensitive crop plant towards fertilization. Sufficient macro and micronutrients in the soil must be available during the maizes growth phase. Providing nutrients for maizes can be done by adding organic or inorganic fertilizers. The aim of this research is to determine the effects of interactions from maize waste composts and NPK fertilizers on the morphophysiological characters of maizes in ultisol soil. The research method used was a Randomized Block Design (RBD) with 2 factorials, the dose of maize waste composts (K) and the dose of NPK fertilizers (P). The result showed that the factor K treatment is significantly affected the growth and the yield components of maizes. The level k2 treatment (20 tons ha-1 of maize waste composts) generally gave the highest mean for maize cobs length and diameter, seeds per maize cob and per plot. Key W ords: yield, maize, compost, morphophysiology, ultisol.

The study aims to determine the effect of the application arbuscular mycorrhizal fungi, phosphate fertilizers on the growth and yield of white corn on ultisol soil. The research method used a factorial randomized block design. The first factor was the use of mycorrhizal fungi (without mycorrhizae, and given mycorrhizae) and the second factor was the dose of phosphate per plant (5 g/plant, 4 g/plant, 2 g/plant, 1 g/plant, and 0 g/plant). There is an interaction effect of inoculation dose of AMF and P on cob and cob weight variables. The AMF treatment significantly affected the weight of the cobs with the cobs, the weight of the cobs without the cobs, the number of seeds per ear and the number of mycorrhizal spores. The dose of P fertilizer affected the variable weight of cobs with cobs, weight of cobs without cobs, length of ears and number of seeds per ear. Key words: AMF, cobs, corn husks, marginal land, phosphate fertilizer