OK, ok... so I am trying to get my mind to grasp the concept of nitrogen and the process in which it becomes available to plants. As I do I will try to state it in English? maybe. These first questions are mainly for the very well rehearsed and resourced folks. Maybe you can direct me to reading and basic understandings that will help me understand and apply the information. Nitrogen is only available to plants in two forms... NO3- (nitrate) and NH4+ (ammonium) http://www.cfaitc.org/Commodity/pdf/Nitrogen.pdf My first study is NO3-. For those of you who have gone there before me... Are nitrates available to plants strictly as the salts? (NO3-) OR are the nitrates known as esters also available forms of nitrogen?