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root surface

Catalogue: GRDC YouTube channel
P is transported to the root surface by diffusion... P supply by diffusion is determined by: the effective P diffusion coefficient (soil dependent), the P concentration gradient from the soil solution to the root surface (depends on soil solution P concentration and root uptake characteristics), root surface area (bigger root zone volume, more P uptake)... Technology to reduce spray drift GCTV: Drift Reducing Technology..
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Catalogue: GRDC Updates
The structure of roots is a consequence of their primary functions- growing through an abrasive medium (the soil), acting as plumbing to absorb and transport water to the shoot, and actively and selectively absorbing essential nutrients such as mineral N (nitrate and ammonium), inorganic P and K. the structure of leaves is designed to absorb radiation for photosynthesis, regulate evaporative losses of water, act as a sink for nutrients and water transported from the root system, and produce carbohydrates from photosynthesis... The root surface comprises a layer of epidermal ('skin') cells (some with extensions or 'root hairs') that absorb water through their cell walls and cell membranes and which have specific sites where nutrient forms such as nitrate, ammonium, phosphate and potassium are bound onto 'carrier' molecules and transported across the cell membrane into the interior of the cell... Any so-called microbial activators or mineral-solubilising microorganisms are operating in a hostile environment full of competitors...
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