Question

there are two samples of soil sample a has ph 4.5 and simple b PH 7.5 which of the sample should be treated with chalk powder and why

Answer 1

soil with ph 4.5 should be treated with chalk as the soil sample is acidic in nature and adding chalk would neutralise the acidity and would help in making a soil bit alkaline or decreasing the acidic effect abd getting it ph value roughly near to 7

Answer 2

b should be treated with chalk powder because chalk powder is basic in nature and we know that pH of basic is more than 7