William Sisson's root respiration measurements
sand mulch on 3-inch ponding dikes with planted grass
sand, sludge, and brush mulches on 3-inch ponding dikes
crusted surface soil, 3-inch ponding dikes
last years sludge and newly planted grass at 3-inch ponding dikes
mulch treatments on 6-inch ponding dikes
spreading sewage sludge at 6-inch ponding dikes
rangeland drill and skidder at 6-inch ponding dikes
spreading sewage sludge at 3-inch ponding dikes