Symptoms of dry mouth syndrome. Dry mouth symptoms may include: saliva that feels thick or stringy. rough, dry tongue. the tongue tending to stick against the roof of the mouth. problems with chewing or swallowing (particularly dry foods such as biscuits) bad breath. mouth ulcers.
Once nitrogen is fixed, it is subject to several chemical reactions which can convert it to different organic or inorganic forms. Mineralization occurs in soil as microorganisms convert organic nitrogen to inorganic forms.
As a result, soil organic materials become increasingly nutrient rich as decomposition occurs. Cereal straw, for example, is made up of carbon and nitrogen in the ratio of 100:1 when it is added to the soil. As this material decomposes and forms humus, its carbon to nitrogen ratio decreases to 12:1.