Phosphorus is especially important during early root development. A good supply of phosphorus ensures rapid root growth and good uptake of other nutrients.
Phosphorus is very immobile in the soil and is only taken up within 1-2 mm from the root. Placement of phosphorus will often give a higher uptake efficiency and result in a higher availability of phosphorus. Phosphorus availability is especially affected by cold soils where the mineralization of phosphorus is low.
Phosphorus deficiency inhibits growth of the sugar beet plants giving them a stunted, stiff appearance.
The colour of the leaves ranges from dark green to dull blue-green.
Furthermore, anthocyanin may be visible which gives a red/violet colour to the leaf veins and margins.
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