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.
An important step in the soil nitrogen cycle is the conversion of ammonium (NH4+) to nitrate (NO3-). This process results in nitrogen in the form most used by plants--nitrate. Ammonium has a positive charge. Clay particles in soil have a negative charge.