Available P
Available P is what the root meets, not the purity on a bag.
Speed
- Available P。
- Available P is what the root meets, not the purity on a bag.。
- The P column the root can actually use. High total, low available: acid or lime soils.。
- The P column the root can actually use. High total, low available: acid or lime soils.。
How it appears on the sheet
The P column the root can actually use. High total, low available: acid or lime soils.
A sketch. Do not fertilise from the picture alone.Common units
Often mg/kg. The method (Olsen etc.) is on the sheet.
How to read the number
The P column the root can actually use. High total, low available: acid or lime soils. Fix pH and band it. Don’t only dump more powder Easy to mix up: Available P is not total P. Read both to see lack versus lock Available P is what the root meets, not the purity on a bag.。
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
The P column the root can actually use. High total, low available: acid or lime soils.
Don’t do this
- High total P, so you never ask available P.
- Adding powder without opening the pH lock.
- Available P is not total P. Read both to see lack versus lock.