©
bladepdx5: add vinegar
©
bladepdx5: add baking soda
©
bladepdx5: preparing to do science
©
bladepdx5: soil layers 0
©
bladepdx5: soil layers 5 min
©
bladepdx5: pH test
©
bladepdx5: pH test 2
©
bladepdx5: K in light
©
bladepdx5: P in light
©
bladepdx5: N in light
©
bladepdx5: pH in light
©
bladepdx5: All four indicators