Wow, you ready for this?
Technical Al ready to explain his program and why I do it.
Ok here we go. Sometime ago I brought about my dealings with humic acid and its benifits for better growth in bonsai. Nothing new, farmers have been using it for decades. Michael Persiano had it, but didn't know he did. His superfeeding program was totally based on the effect from humic acid but they did not know why it worked. Many tried making the superfeeding poo balls from the list of ingredients he used yet did not see the same effects. Part of the problem was that his recipe contained Roots II fertilizer, a product that contained humic acid. It was not so much the concoction of ingredients he used to make the cake as it had more to do with the application of the humic caid as part of the recipe. Many could not get the roots II and therefore were missing the most important part of the cake. From my point of view he could have had just as good of results by using the roots II on its own and throwing away the concoction of smelly ingredients and flour based fillers to get it to bind.
So an overview of nitrogen and how it works.
the NPK on the label of fertilizer tell you the total breakdown of nitrogen, phosphorus and potassium. It also tells you the breakdown of the nitrogen and where its derived. It will be listed as Ammoniacal or Urea. Both are extreamly water soluable and are fairly available to plants. The ammonical nitrogen is most notably derived from ammoinium nitrate and the urea is from a man made chemical known as urea. It is a byproduct of gasoline production. Urea can sometimes by called an organic fertilizer by virtue of it containing large amounts of carbon. while carbon is organic it is not in the same sense as water insoluable fertlizers derived from blood and bone or animal byproducts.
The more ammoniacal nitrogen in a fertilizer the "hotter" is is. This is because plants can only take nitrogen in as nitrate. Half of the ammonical nitrogen will have to be browken down by the soil into nitrate to be used. It is usally washed away. The good news is that nitrogen locked into ammonia is attracted to clay particles. Nitrogen is repelled by clay. So if your plant uses half the nitrogen the rest is flushed away but the attracted ammonia will turn into nitrate to fertlize another day. This happens very quickly in soil, with the added benifit of acidifying your soil.
Urea nitrogen must first be converted to ammonia and then converted into nitrate. this makes it more long lasting in fertlizer formulas Osmocote is almost all urea with a polymer coating on it further reducing its conversion to nitrate. Untill the urea has turned into ammonia it can be washed thru the soil substrate very quickly reducing its effectiveness. This is why guys like Walter Pall say we fertilize too little, we need to fertilize more. No we don't, we fertilize plenty, we just don't utilize what we put on and wash it straight thru the substrate.
What we need is something to bind the nitrate to the substrate like the ammonia. That is where the humic acid comes in. By chemical reaction as a catylist (meaning it adds nothing in the way of fertlizing benifits), it changes that ion attraction of the nitrate and binds it with the clay particle for assimilation by the plant.
Others out there are advocating higher NPK values in an effort to see better results. By moving towards fertilizer with more ammoniacal nitrogen, like Ammoniam nitrate, we see faster results. This is hard on the plant, leads to leaf burn, and coarse growth as well as the dreaded salt buildup.
Insoluable nitrogen, truely organic fertilzer is mostly dead animal byproducts and indutrial sludge. (rapeseed cakes from the pressing of rapeseeds for cooking oil). Due to the nature of the product it takes many weeks months and sometimes years to fully turn bone into nitrate. This does have a benifit of being very slow and methodical allowing the small release of nitrate on a ongoing level for years. This keeps plants strong with softer and smaller growth.
So what does Al use and why?
First I use the gro power plant tabs. I use these throughout the year mostly in the growing season from March to September for me. I like them because the NPK is pretty goof for me. While the nitrogen is 12 in the NPK it is composed of just 3.5 percent urea nitrogen and 8.5 percent insoulable nitrogen in the form af blood and bone. (I called). That means there is no readily available nitrogen in this product. It must be broken down by the soil brfore it begins to be used by the plant. the first nitrogen is the urea turned into the ammonia and then into nitrate. By that time the 4 percent humic acid is starting to work on the nitrate and bind it to the akadama in my soil. (more snake oil right!) evenethough the plant tabs seem to break down into ash fairly quickly, the goodies are already locked up in the soil for the plant to use for months.
Now the gro power granules. I must confess that this was the first product I used over 7 years ago. I liked it but it was messy. It floats all over the pot, runs out of the pot if the soil is too high, and will stain a pot if used for many years. It does come off, just have to remove it like calcium stains.