Prepare the soil where you will be planting the mung beans. Dig to a depth of 6 inches or more. Pour a layer of about 2 inches of organic compost over the top of the dirt. Use the spade to work it in all the way through to the bottom. Use the rake to make a flat planting area.
Use the corner of the hoe to dig a line in the soil. Draw another line a foot parallel to the first one. These lines will later act as water moats. Allow the soil to fall to the center of both rows, creating a peaked row in the middle.
Make a 1-inch deep row down the center of the peak with your finger. Plant the mung beans inside of the row about 6 inches apart. Push the soil over the top of the beans.
Sprinkle the planted area with water. Repeat this about once a day unless the weather is dry and hot. Then, water more often to keep the soil moist, but not sopping wet.
Water the mung beans directly in the moats that were made with your hoe after they have spouted, or germinated, in about three to five days. This encourages strong roots that give stability to the plant.
Pull the plants after about 90 days when they mature. Use some beans for sprouting. Dry the rest of the beans in the pods on the plant by tying several together at the bottom of the stalk. Attach a paper bag over the leaves and pods. Tie the plants upside down, with string, in a dry location. As the pods dry they will open and drop the mung beans in the bag.