The pesticides and fungicides applied to grapevines are not water-soluble.
At least two "determinants" are thought to be concerned in the nutrition of growth, a fat-soluble and a water-soluble substance.
Compute percentages of water-insoluble ash and water-soluble ash.
The ash was taken in each case, and the alkalinity of the water-soluble ash was calculated as potash (K2O).
The banana has been shown by Sugiura and Benedict to be poor also in the water-soluble vitamine.
As is well known, yeast possesses the water-soluble vitamine in marked concentration.
This compound is water-soluble, but caffein can not be extracted from the crystals with anhydrous solvents.
Hence, they must be in water-soluble form before they can be utilized by plants.
The antiscorbutic vitamine is soluble in water, and therefore is termed by some the “water-soluble C” factor.