Manganese - a problem or not?
Publicado en 05/12/2011 17:38
| 22/12/2011 17:43
Reaction on the comments
Oded, Youre right these elements are very important for coloring the leaves.
The deffirence between Manganese and Iron defency is that by Iron defency between the veins of the leaves it's complet light green / yellow and by manganese it are light green / yellow spots between the veins of the leaves
| 27/12/2011 07:03
reaction on the comments
completely agree Ronald .
| 19/12/2011 19:45
There is a confusion in Mexico mainly as far as outdoor vegetables between Mn & Fe deficiency that both resulted in light pallid green color. From a quick look both seems with the same symptoms but if you take the leave hold it in the back in front of the sun and you will see a sort of mosaics , many yellow points , this is a Mn. Deficiency and not a Fe deficiency. Mn , Fe with Nitrogen and Mg are of the main 4 nutrients which involving in the greening effect of the leaves. Actually a mix of Fe, Mn with Magnisal might green the plant in case we don’t know which specific nutrient is causing the general light , pallid rather dark green color.
Oded , Mexico
| 12/12/2011 06:13
I've been following your blogs up regarding ME availability and chelate toptics these days. They are all very professional and useful to me. Thanks. Particularly your previous blog regarding Fe EDTA/DTPA/EDDHA were very nice for me to learn and understand the practical things and logical explanation behind.
Now here is my simple question to you. Normally Fe/Mn/Zn/Cu availability show similarity with pH. The higher the pH, the lower the availability. Besides Fe, then why only Mn is addressed important with Mn-EDTA in above pH 6.5? Why not with Cu and Zn as well? Is it because Mn is needed in relatively higher quantity than Cu/Zn?
Also I think, actually I checked them many times, Mn is added very higher in the solution of Dutch fertilization program than standard one here in Korea. Maybe is the difference from the pH difference between the two sides?
I hope that I can hear more from you later.
Anyway thanks a lot and I am learning very practical/useful things from your blog.
| 22/12/2011 17:56
Reaction on the comment of Gilhong Ko
Hello Mr Ko,
It's nice to read that my blogs are usefull for you.
Most growers with pH problems have a pH not higher than 7 and till 7 there is no avalability problem with Cu and Zn that's why we don't advice to use Cu and Zn chelate.
But there can be a other problem, if you add Copper Sulphate and/ore Zinc Sulphate to the same tank as Iron chelate the Iron in the chelate can be replaced by Copper and/ore Zinc. The Iron is than free in the tank and can be sedimentated with phosphate. That's why we use in soluble NPK fertilizers chelated Copper and Zinc.
We use high amounth of manganese in Dutch fertilisation system becouse we see that a higher amounth of manganese gives better quality of the flowers and fruits.