Brain disorders can also have an effect on the display of delta waves. Parkinson's disease, schizophrenia, and narcolepsy are all characterized by changes in delta wave activity. Some drugs and chemicals have been shown to impact the brain's delta waves.
Pruning advanced ornamental trees. Now's the time... Generally speaking an ornamental tree is one that is grown for its decorative looks and not for food. Winter is the perfect time to prune deciduous ornamental trees, as their structures are dormant. Inside the tree though, important processes are underway.
Privet hedges. Privet should be trimmed at least twice a year, from May to August. The more you cut it, the more it forms a dense, even hedge and the easier it is to keep it to the same size. If necessary, prune it hard in April to reduce the size of the hedge. Laurel hedges.