Which would be better suited for agriculture, the soil of a tropical rain forest, or that of a temperate deciduous forest?

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.