Suggest for Mango farm improvement

Hi Guys,
I needed some help on improving the mango farm and possiblity of growing other products in the farm. There are 82 mango plants in about 2 acres of land. What else can I plant to improve the productivity. I water these plants once a week on Sundays. It’s a non irrigated land. Any suggestions please?

Plant Drumstick, Gliricidia etc for improving the nitrogen. Make trenches in between the rows of the mango plant and fill them up with leaves etc for further improvement of the soil. This will increase your productivity.