Crops absorb nutrients through three primary mechanisms: mass flow, diffusion, and root interception. When it comes to phosphorus (P) uptake, diffusion plays the dominant role, with root interception and mass flow contributing to a lesser extent.
For effective P absorption, a concentration gradient in the rhizosphere is essential. This highlights the importance of placing P fertilization close to the roots, preferably in a concentrated band, rather than dispersing it across the entire field.
The Importance of Phosphorus Placement in Potatoes
Potato plants have a relatively underdeveloped root system, making targeted P placement critical for maximizing yield and quality. Research findings emphasize the following:
- Band placement of P below tubers is more effective than broad spreading.
- Nutrient use efficiency (NUE) improves when similar yields are achieved with less P.
- 1.5 t/ha of P applied broadly is equivalent to just 1 t/ha in a banded application.
- Adding trace elements (Ultra) further enhances return on investment for farmers.
Partnering for Sustainable Agriculture
Regardless of your farming practices, crop rotation strategies, or long-term objectives, Kynoch’s expert agriculturists are committed to supporting you. We don’t just provide fertilizer—we work alongside farmers to build a sustainable future for South African agriculture.