Freebase(0.00 / 0 votes)Rate this definition: Chemical property. A chemical property is any of a material's properties that becomes evident during a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.
Ground Temperature. The best time to plant your corn seeds is when the soil temperature reaches an average of 50 degrees Fahrenheit. You can determine the average ground temperature in your garden using a soil thermometer -- available at most garden stores.
While sweet corn needs soils around 60 degrees Fahrenheit for germination, field corn can withstand lower soil temperatures as long as the threat of frost has passed. Kernels should be spaced at least 12 inches apart with rows 3 feet apart, about 1/2 inch deep.