text: Yo, check it out, I got a story to tell
  'Bout commercial-scale recycling, keepin' it swell
  Agricultural and municipal waste, we don't waste
  Turn 'em into organic soil amendments, no time to waste
  
  Safe disposal, no more contamination in sight
  Helpin' the environment, doin' it right
  But hold up, there's a problem that's causin' strife
  Phytotoxicity to crops, it's affectin' farmers' life
  
  Commercial chicken manure and Milorganite, hear me out
  They ain't playin' nice, causin' some doubt
  Phytotoxic they be, can't deny the truth
  But let me break it down, no need to be uncouth
  
  Chicken manure got 10.8 ppm of Cu, that's copper
  And 0.7 ppm of Ni, nickel, discover
  Milorganite got lower levels, ain't as much
  But it's still phytotoxic, gotta keep in touch
  
  In this study, they found a solution that's intense
  5 ppm of Cu, lower than the chicken manure's sense
  But it's highly phytotoxic to mustard seeds
  Messin' with germination, plantin' some needs
  
  So it's clear, the phytotoxicity of manure's due to Cu
  That copper's causin' problems, what it do?
  Now let's talk about Ni, nickel's in the mix
  1 ppm ain't phytotoxic, that's the fix
  
  But hold up, when 0.125 ppm of Ni came around
  It got phytotoxic, had to make a sound
  They added 62.5 ppm of Na, sodium, you see
  It's nontoxic, but with nickel, it caused some glee
  
  Chemicals in these organic amendments, they be playin' tricks
  Synergistic effects, causin' phytotoxicity, that's the mix
  So let's be aware, let's be wise
  When it comes to recycling, let's open our eyes