Research that has been carried out with the aim of knowing the interaction effect and the main coconut shell biochar and NPKMg 15:15:6:4 on the growth of hybrid areca nut (Areca catechu L.) seedlings on yellow red podsolik planting media. The research was conducted at the Experimental Garden of the Faculty of Agriculture, Riau Islamic University, Air Dingin Street, Air Dingin Village, Bukit Ray…