The study is intended to study the effect of nitrogen fertilizer on the growth of pepper. By studying the function of nitrogen to the chili. Nitrogen is a nutrient that is vital to the growth of peppers is tremendous. If the chili that get nitrogen at least not enough demand. Or if it gets too much need of chili. Chili is growth may result in incomplete or wrong, such as If the chili gets too much nitrogen can cause the chili is easily broken down. And have a branch too much nitrogen, etc., and if it gets too low, it makes it the pepper is Growth slowly. And stem dwarfism, etc. The effects of nitrogen on the growth of chilli. Nitrogen is found to affect the growth of chilli both sides height and Canopy width. And Colors and fruits of chilli. The chili was much nitrogen will make the color more intense than that of chilli fruits that are not nitrogen. And the size of the chilli is a small increase. And if it is less nitrogen will make the chili lack chlorophyll. The cause leaf yellow .