Machine shaking mummies is the alternative to hand poling. It is more economical when there are a lot of mummies, if they are difficult to remove, or the trees are so tall that poling is impractical. The severity of the shake can be adjusted to match the energy required to remove the nuts. Usually winter shaking is less vigorous than at harvest time. This year we are lucky that the nuts are easily removed despite the dry conditions. Often nuts are difficult to remove unless they are saturated with water from rain or fog.