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.
Planting should not occur before soil temperatures are near 50Â° F for corn and 55Â° F for soybeans with a positive weather outlook. At 50Â° F corn will take approximately 25 days to emerge. At 55-60Â° F corn will take 10-14 days to emerge. At 65-70Â° F corn only takes five to eight days to emerge (Meyer). How long a seed can last in the soil and remain viable depends on temperature, moisture, and pests.