text: Yo, check it out, I got a method to determine
  Soluble silicon concentrations, listen and learn
  In nonliquid fertilizer products, I devised a plan
  Using sodium carbonate and ammonium nitrate as my hand
  
  I extract that Si with Na2CO3-NH4NO3
  Then I analyze with spectroscopy, let it flow
  Heteropoly blue analysis at 660 nm
  That's the wavelength where the magic begins
  
  This 5-Day extraction method, it's so fly
  Quantify plant-available Si, oh my oh my
  Solid fertilizer products, Si levels from 0.2 to 8.4%
  With an LOD of 0.06% and LOQ of 0.20%, that's legit
  
  This method correlates with plant uptake, see the connection
  R2 value of 0.96 for a range of fertilizers, perfection
  It works for solid Si fertilizers, blended or pure
  Beneficial substances, all can be ensured
  
  No need to sweat, it's easy to do
  Process the materials with lab chemicals, it's true
  At ambient lab temps, no need for heat
  I got you covered, this method's so sweet
  
  Approved by The Association of American Plant Food Control Officials
  For testing nonliquid Si fertilizer products, no more issues
  So if you're in the game of fertilizers, take note
  This method's the real deal, it's the way to float