plastochron
Member
Most everywhere I work, Fe is off the charts.
Here you can put a magnet on the soil and the soil sticks to the magnet.
This is why it is important the right type soil analysis be used to understand where you are. There is only one place on my farm that needs iron, there the soil is white, it is a calcium carbonate mine and has less than 1 ppm of iron. But instead of applying iron, we just add 30 lbs of the high iron soil instead per plant.
Not many soils that I have seen have Fe deficiency. In fact, most have toxicities. Realize that Fe deficiencies and toxicities look a like to the eye! Beware!
When I apply foliar metals and that is not often, I use Albion or Baicor amino acid chelates. The dosis per acre is tiny. Their multimineral at Albion is spectacular, I add the Mn, Zn and Cu chelates to the multimineral to dilute the Fe in the multi... works great!
One last point, if you read back a bit you will find that Cannabinoid article with the calculated base distributions.... posted it a couple of times. Go back and look at the soil versus the leaf analysis. Look at the Fe/Mn ratios in the soil. Then look at the Fe/Mn ratios in the foliage....
Then look at sample number 2 and look at the Fe/Mn in soil and leaf....
What I have recently realized is that in parts of the world with a balanced Fe/Mn ratio, of say 1 to 1, even 1/2 or 1/3,those soils out produce in quality and yields a soil that is dominated by Fe... blueberries is an amazing example. Pineapple is another. The yield differences can be upto to 200% and qualitative difference is incredible where Fe is dominated or equal to Mn.
thank you for the rapid response! i will look back through the thread to find the posts you mentioned.
most of the Fe toxicities i've seen (granted this is much more in hydro and big pots than field soil) appear as symptoms of Mn and/or Zn deficiency... especially when using a ton of CalMag