improving soil!!

Please provide me list of Firms / companies doing soil testing in Chennai. The results should be reliable and should also provide suggestions on improving the soil in organic method. Thanks

VERMI COMPOST Advantages of vermicompost: 1. Vermicompost is rich in all essential plant nutrients. 2. Provides excellent effect on overall plant growth, encourages the growth of new shoots / leaves and improves the quality and shelf life of the produce. 3. It improves soil structure...