When you fertilize a soil with a potassium fertilizers, which of the following is true?

When crops take up cations from the rhizosphere, this typically acidifies the soil (i.e., decreases soil pH).

When determining the liming requirement of a soil, we use the pH measured in water.

K, Ca, Mg, S are all considered macronutrients. 

Because rainfall is naturally alkaline, soils tend to be more alkaline when developing in wetter climates.

In most soils, organic S is found in greater quantities than sulfate (SO42-) in solution.

Which of the following is not sorbed readily on CEC?

Fertilizers actually contain K2O, a molecule that exists in the real world.

Sulfur is found as the SO42- anion in soil solution of aerobic soils. 

Which of these does not apply to soil salinity and saline soils?