¹ Doctoral Program of Agriculture Science, Faculty of Agriculture, Universitas Sebelas Maret, Indonesia

² Department of Agrotechnology, Faculty of Agriculture, Universitas Sebelas Maret, Indonesia

³ Department of Soil Science, Faculty of Agriculture, Universitas Sebelas Maret, Indonesia

*Email: desysetya2306@gmail.com

Land conversion causes a decrease in the area of ​​agricultural land, so that agricultural cultivation efforts through agroforestry systems are needed, such as planting between mahogany trees. This study aims to examine the role of organic fertilizer on the morphology and physiology of soybeans in agroforestry systems with mahogany stands. The study used a complete randomized design with one factor, namely the type of organic fertilizer with 4 levels, namely chemical fertilizer (urea 50 kg/ha, SP36 100 kg/ha and KCL 100 kg/ha), chicken manure (5 tons/ha), manure fertilizer goats (5 tons/ha) and cow manure (5 tons/ha). Repeat 3 times. Light absorption by soybean under mahogany stands is 33200 lux. The results showed that the type of organic fertilizer affected soybean morphology, namely plant height 2 and 3 WAP, leaf number 4 WAP, and soybean physiology, namely total chlorophyll. The plant height (34.3 cm) and the number of leaves (17.5 strands) were highest in the goat manure fertilizer treatment. Chicken manure produced the highest total chlorophyll, which was 0.0743 mg/g. Total chlorophyll count was positively correlated with the amount of chlorophyll a. In addition, plant fresh weight was positively correlated with plant biomass and plant moisture content. Soybean has the potential to be cultivated in agroforestry systems and the addition of nutrients with organic fertilizers.