Mobile Nutrients Immobile Nutrients Nutrient Uptake Independent of growth stage Independent of environment Response does not depend on reservoir Nutrient Uptake Dependent on growth stage Dependent on environment ID: 229001
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Slide1
Bray’s Mobility Concept
Mobile Nutrients
Immobile Nutrients
Nutrient Uptake:
Independent of growth stageIndependent of environmentResponse does not depend on reservoir
Nutrient Uptake:Dependent on growth stageDependent on environmentResponse depends on reservoir
Root Surface Sorption Zone
Root System Sorption Zone
Sufficiency
cannot be used for mobile nutrients due to the fact that a soil test indicates the total amount available within the profile, not within the root system sorption zone.
Sufficiency can be used for immobile nutrients because roots expand within the profile, therefore, the same amount will be available as immobile nutrients are taken up via contact exchange.
Indicators:Biomass (% coverage)Color (concentration
Indicators:Biomass (% coverage)Color (concentration)
Adapted from Raun by Tracy Wilson and Alex Cumbie, 2012Slide2
Bray’s Mobility Concept
Mobile Nutrients
Immobile Nutrients
Nutrient Uptake:
Independent of growth stage
Independent of environment
Response does not depend on reservoir
Nutrient Uptake:
Dependent on growth stageDependent on environmentResponse depends on reservoir
Root Surface Sorption Zone
Root System Sorption Zone
Sufficiency cannot be used for mobile nutrients due to the fact that a soil test indicates the total amount available within the profile, not within the root system sorption zone.
Sufficiency can be used for immobile nutrients because roots expand within the profile, therefore, the same amount will be available as immobile nutrients are taken up via contact exchange.
Indicators:BiomassColor
Indicators:
BiomassColorConcentration