It is generally only used during the daylight saving time for places that observe Pacific Standard Time (PST) during the non-daylight saving period. As mentioned earlier, most parts of Arizona do not observe daylight saving time, so these parts remain on MST. The Navajo Nation lands, which extend to the states of Arizona, New Mexico and Utah, observe daylight saving time from April to October.
The nature of chaff is different enough from wheat to render it worthy of fire. If you plant a little of the stem or stalk of the wheat plant, it will not grow. If you tried to sell it, you might get a few pennies, but not anything like that of the grain itself.
The flash point is often used as one descriptive characteristic of liquid fuel, but it is also used to describe liquids that are not used intentionally as fuels. The fire point of a fuel is the temperature at which it will continue to burn after ignition for at least 5 seconds. At the flash point, a lower temperature, a substance will ignite, but vapor might not be produced at a rate to sustain the fire. Fire point and autogenous ignition are additional considerations when selecting fire resistant greases.