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International Certified Crop Adviser Exam With 100% Correct Answers 2024.
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International Certified Crop Adviser ExamWith 100% Correct Answers 2024.
Soil Minerals
Clays, carbonates, hydroxides
Mineralization
Organic material decomposed into nutrients in a inorganic from
Immobilization
nutrients converted into biomass become 'tied-up' and are unavailable for nutrient cycling
Uptake antagonism between ions
Two or more ions may compete for plant uptake by various mechanisms. One ion is said to be
antagonistic with regard to the uptake of another ion
mass flow
movement of nutrients with the flow of water to plant roots: Nitrogen, Calcium, Magnesium
Diffusion
Movement of molecules from an area of higher concentration to an area of lower concentration. P and K
root interception
acquisition of nutrients by a root as a result of the root growing into the vicinity of the nutrient source
Nitrogen soil mobility
Mobile as Nitrate (NO3). Immobile as ammonium (NH4)
Phosphate soil mobility
immobile in soil except where P absorption capacity has been met (CEC)
Sulfate Soil mobility
Mobile in most soils
Ca, K, Mg soil mobility
Immobile in most soils held by CEC. Ions mobile in soil solution
Nutrient holding capacity in regards to texture
More clays have more room for nutrient storage. increased sand content have increased leaching ability
Soil structure in regards to nutrient holding
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