😁😁😁 sir i know why you didnt mix these in front of us ,,, founding acidic and basic soil is quite difficult ,,, so you mix it with acid and base to got these results😂😂😂😂😂 But the process is good and helfull ,,, btw my school teacher also do that 😉
FAKE.. You just spiked the same sample 'B' with acid and base to get different results. Just why? Unless you are working near a chemical factory who don't respect environment, you won't get theses extreme pH values. It would be more useful to demonstrate real soil sample variation. My background: analytical chemistry technician from Canada.