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.
Between real early spring and mid April is the ideal time to divide ornamental grasses, depending upon where you live. But the key is to get them divided before they start growing for the season. Just dig up the clump and cut, chop or saw the clump into small pieces. There really is no exact science about how to go about this.