Based on the milligram per Kg of soil sample of each analyte, calcium ion, Ca2+ and magnesium ion, Mg2+ are both classified as macronutrients.
Soil nutrients are minerals which are found present in the soil and which are required by plants for their growth and development.
Soil nutrients can be classified based on amount needed by plants as well as the amount present in the soil into:
The mg/Kg of each analyte in the soil sample is as follows:
mass of soil sample = 2.65 g = 0.00265 kg
Calcium ion:
amount per mg/Kg of soil sample = 0.625mg/0.00265 kg
amount per mg/Kg of soil sample = 236 mg/kg
Magnesium ion:
0.00245 g = 2.45 g
amount per mg/Kg of soil sample = 2.45 mg/0.00265
amount per mg/Kg of soil sample = 924 mg/Kg
Therefore, calcium ion, Ca2+ and magnesium ion, Mg2+ are both classified as macronutrients.
Learn more about soil nutrients at: https://brainly.com/question/8901446
