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.
Gardeners usually plant corn (Zea mays) 10 days to two weeks after the last spring frost, when the soil temperature begins to warm. If corn is planted when the soil temperature is 60 F, then corn sprouts typically break the soil surface in 10 days to two weeks. If you planted sweet corn and two weeks passed without sight of the first green shoot, then several factors may have caused the delay.