Effect of Phosphate Fertilization and Liming on Ultisol Soil on Dry Corn Seed Yield (Zea mays L.) and Soybeans (Glycine max L.(Merr))

Fertilization of phosphate and lime on ultisol soils will increase the pH of the soil where a high soil pH causes an increase in nutrients. However, the fertilization carried out must pay attention to several things, namely the plants being fertilized, the type of soil, the type of fertilizer used, the dose given, the fertilization time and the method of fertilization. This study aims to obtain information on the effect of phosphate fertilization and liming on ultisol soil on the yield of dry corn (Zea mays L.) and soybean (Glycine max L.(Merr). This research was carried out in Halong Village, Baguala District, Ambon City, which took place from January to May 2024. Soil and plant analysis was carried out at the Soil Laboratory, Faculty of Agriculture, Pattimura University. The experimental design used in this study is a complete randomized design with a factorial pattern with three replicates. The factors studied were P fertilizer and lime, where the parameters studied were the weight of dry seeds, corn kernels and soybeans. The results showed that phosphate fertilization on ultisol soil could increase soil pH which led to an increase in dry seed weight of corn and soybeans and the best combination of phosphate and lime fertilizer dosage on ultisol soil for an efficient increase in dry seed weight of corn and soybean was 92.6 kg P2O5/Ha and 1.5 x Ald.