These three kinds of plant food are ordinarily all that we need to supply.
Scientists tell us that there is an abundance of plant food in most soils.
What profitable crop on your farm removes the least plant food?
Put the seeds in the tubes, and water with plant food in solution.
As an element of plant food, magnesium is as essential as calcium.
It was with plant food, if at all, that he made provision for the future.
Starch is necessary for plant food and it is manufactured in the leaves.
He also eats other insects, as well as a good deal of plant food.
Keep this fact in mind, and be generous in your supply of plant food.
There is a good deal of coal in the world, and there is a good deal of plant food in the earth.