Lab 3 Soil Fertility

Reagent to extract available potassium (K)

• 1M ammonium acetate pH 7.

• 1M KCl

Acidic soils contain low K, Ca and Mg for plant uptake

• True

• False

Exchangeable Al in large amount makes up acidity in soil

• True

• False

The higher an ion's binding affinity, the higher its leaching potential

• True

• False

High concentration of K ions can replace Al on the exchange surfaces

• True

• False