truly know the weight of a bale or lot of hay is to weigh it. Of course, it is rare that the seller will have a scale of sufficient size to the weigh the bales. In fact, many sellers will be offended if the buyer doesnât take the sellersâ word for it and insists onweighing the bales prior to the purchase. As a result, the only choice may be to estimate the average weight of the bales. Table 1 lists common bale sizes (width and height) and a calculated estimate of the lbs of dry matter (DM) in bales of that size at different bale densities (i.e., lbs of DM per ft3). Of course, bale density is very difficult to estimate. Most modern round balers will make a bale that is between 9 and 12 lbs of DM per ft3. If the bales are very loose and spongy when pressed, it is likely that
Earthquakes occur most frequently around the edges of tectonic plates, especially where two plates are either colliding or sliding past one another. The most active earthquake zones in the world are in areas around the edges of the Pacific oceanic plate, such as California, Indonesia, Japan and New Zealand.
Causes. An earthquake is the shaking and vibration of the Earth's crust due to movement of the Earth's plates (plate tectonics). Earthquakes can happen along any type of plate boundary.Earthquakes occur when tension is released from inside the crust. Plates do not always move smoothly alongside each other and sometimes get stuck. When this happens pressure builds up. When this pressure is eventually released, an earthquake tends to occur.arthquakes can happen along any type of plate boundary. Earthquakes occur when tension is released from inside the crust. Plates do not always move smoothly alongside each other and sometimes get stuck. When this happens pressure builds up. When this pressure is eventually released, an earthquake tends to occur.