Question: asking about soil test. 
Answer: --remove the upper surfae debris  from the soil and insert aspade or trowel  up to a depth of 20-30 cm and take several core sample randomly (about 10-15 samples should be take). almost 1 kg of soil should be collected. after collection mixed your samples in a clean polythene bag or container and submit it to krishi vigyan kendra of your respective district. 

 before collection please contact once with the principal scientist of your krishi vigyan kendra - dr. dhirendra nath kalita- 9435044574.