CP24256The spatial distribution of soil nitrogen determines responses of Sorghum bicolor to banded phosphorus fertiliser
Applying concentrated bands of P to the subsoil (‘deep P’) increases plant P uptake in cropping systems reliant on stored soil water. However, we determined that sorghum (Sorghum bicolor) deep P responses can be limited by delayed N access, with biomass accumulation, productive tillering and P uptake maximised when N was concentrated in the 0–20 cm soil layer compared to at depth. Growers should ensure adequate N status of the upper soil profile to optimise sorghum deep P responses.
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