What goes down the drains can be used to make things grow. Sewage sludge – carefully treated to make it safe – is used often in agriculture. Now, researchers are testing these materials, called biosolids, for use in urban settings. In a new study, researchers combined high-quality biosolids with other urban waste – food and yard waste, sawdust, and nut shells for example. They found several such mixtures to be acceptable in terms of smell and looks, and the mixtures also supported plant growth. Using biosolids and urban waste to make topsoil or engineer additions that increase soil fertility has several benefits. “Soil additions must have nutrients, and ideally organic matter, to support plant growth,” says Ryan Batjiaka, a researcher at the University of Washington. “We are currently very dependent on finite resources to supply these nutrients.” Follow this link to learn more.
Sourced from: Morning Ag Clips