Apical Crop Science Blog
Look here for Announcements, Tutorials and introductions to New Features over time.
Modifications in Apical Reports
We are proud to announce an important change to our lab reports that we've been working on for the last year.
I've included some notes below to help explain the differences, but feel free to give me a call if you have any questions.
Brix> Total Sugars
We're discontinuing Brix measurement in favor of Total Sugars.
% Brix measures total soluble solids (TSS), and you cannot distinguish among sources (i.e. sugars vs salts).
In some cases, this is actually salts that are dissolved and therefore skew the reading into looking high when in reality the plant is unhealthy.
The Total Sugars test resolves this nuance and only measures sugars in the form of Glucose, Fructose and Sucrose and combines them for a total sugars reading. This way the grower/agronomist is only reading sugars and not sugars + salts.
We've added a total Nitrogen reading to our reports.
Plants absorb ammonium and nitrate during the assimilation process, after which they are converted into nitrogen-containing organic molecules, such as amino acids and DNA.
While the NO3 and NH4 readings can be helpful to know if the plant has sufficient N, a more true reading is the total N.
Nothing has changed with the NO3 and NH4 tests; they are the same as before.
Total N is the Nitrate+ Ammonium + N in protein/amino form (organic form).
We validated a method in the lab to analyze the plant fluid for N that is contained in the other forms (primarily proteins and amino acids) to go deeper into the Nitrogen analysis.
I've included a graphic below of L form amino acids (the ones most used by plants) that illustrates where the N is being held in the molecular structure.
Total N= NH4+ NO3+ Organic N (Proteins, Amino Acids, RNA, DNA)