Spray: to apply a liquid in the form of a very fine mist by the aid of a spraying pump for the purpose of killing fungi or insects.
Stamen: the part of the flower that bears the pollen.
Stamina: endurance.
Sterilize: to destroy all the germs or spores in or on anything. Sterilizing is often done by heat or chemicals.
Stigma: the part of the pistil that receives the pollen.
Stock: the stem or main part of a tree or plant. In grafting or budding the scion is inserted upon the stock.
Stover: as used in this book the word means the dry stalks of corn from which the ears have been removed.
Subsoil: the soil under the topsoil.
Sulphur: a yellowish chemical element; brimstone.
Taproot: the main root of a plant, which runs directly down into the earth to a considerable depth without dividing.