Must for all those who are interested in and engaged in soil testing (i) for making site specific fertilizer recommendations for different soils and crops for faciltating balanced and effcient ferilizer application and eddcient nutrient use, (ii) for assessing soil chemical health (iii) for periodically monitoring changes in soil ferility, (iv) for diagnosis of soil constraints such as acidity, salinity, alkalinity, toxicities etc, (v) for developing of soil area-wise soil fertility maps. useful for soil-plant testing laboratories, soil health centers, farm advisory staff of the industry, students, teachers, researchers, libraries, R&D units, consultants, training centers, extension officers, plantation managers, staff of the fertilizer and soil amendment industry , NGOs, environmentalists etc.