Exchangeable Mg
Exchangeable Mg is what the soil can hand over. A lab number, not a foliar brand.
Speed
- Exchangeable Mg。
- Exchangeable Mg is what the soil can hand over. A lab number, not a foliar brand.。
- Mg hits old leaves: yellow between green veins, from the bottom up. That is not iron.。
- Mg hits old leaves: yellow between green veins, from the bottom up. That is not iron.。
How it appears on the sheet
Mg hits old leaves: yellow between green veins, from the bottom up. That is not iron.
A sketch. Do not fertilise from the picture alone.Common units
Often cmol/kg or mg/kg.
How to read the number
Mg hits old leaves: yellow between green veins, from the bottom up. That is not iron. Magnesium sits in chlorophyll. High K crowds it out. Sand and high-K vegetable ground show it Easy to mix up: Iron is new leaves; magnesium is old leaves. Wrong leaf position, wrong bag Exchangeable Mg is what the soil can hand over. A lab number, not a foliar brand.。
Thresholds only, not a prescription. Rates live in the field guide. This page does not hand you a bag count.
What it looks like in the field
Mg hits old leaves: yellow between green veins, from the bottom up. That is not iron.
Don’t do this
- Old-leaf striping sprayed as iron.
- Still pouring potassium that crowds magnesium.
- Iron is new leaves; magnesium is old leaves. Wrong leaf position, wrong bag.