Final answer:
During spring, vegetation generally has higher concentrations of calcium and magnesium relative to potassium.
Step-by-step explanation:
During spring, vegetation generally has higher concentrations of calcium and magnesium relative to potassium. These elements are essential to plant growth and are obtained as cations dissolved in the soil solution. Plants absorb Ca²+, Mg²+, and K* as cations dissolved in the soil solution, with calcium and magnesium being needed in larger amounts than potassium. The soil composition and environmental factors can influence the relative concentrations of these elements in vegetation.