Tooling up for beef herd expansion: Large-scale mixed farms are less commonplace now than a few decades ago, but on units such as Newbottle Estates, with large areas of permanent pasture unsuited to cultivation, livestock enterprises are a central and, in this case, growing business element. Farm manager Andrew Mahon explains to Martin Rickatson the necessary silage, straw, muck and machinery changes to cater for his recent stock expansion