International Certified Crop Adviser- Nutrient
Management Exam. 200 Questions With 100%
Correct Answers 2024.
Macro nutrients
N, P, K, Ca, Mg, S
Micro Nutrients
B, Cl, Cu, Fe, Mn, Mo, Ni, Zn
Nitrogen (N)
Is mobile in the plant
Ammonium ion (NH4+)
Nitrate ion (NH3-)
Phosphorus (P)
Is mobile in the plant
Phosphate ion (H2PO4-, HPO4 2-)
Potassium (K)
Is mobile in the plant
Potassium ion (K+)
Calcium (Ca)
Is not mobile in the plant
Calcium ion (Ca2+)
Magnesium (Mg)
Is mobile in the plant
Magnesium ion (Mg2+)
Sulfur (S)
Is not mobile in the plant
Sulfate ion (SO4 2-)
Boron (B)
Boric Acid (H3BO3)
Borate ion (H2BO3-)
Chlorine (Cl)
,Chloride ion (Cl-)
Copper (Cu)
Cupric ion (Cu2+)
Iron (Fe)
Primarily ferrous ion (Fe2+) some ferric ion (Fe3+)
Manganese (Mn)
Primarily Manganous ion (Mn2+)
Molybdenum (Mo)
Molybdate ion (MoO4 2-)
Nickle (Ni)
Nickle ion (Ni2+)
Zinc (Zn)
Zinc ion (Zn2+)
Cation
Positive charge
Anions
Negative charge
Beneficial Elements
Na, Co, Si, Se
What does Silicon (Si) do for plants
Increase cell wall strength
reduces lodging
improves adaptation to stress like drought
improves pest resistance
helps improve plant vigor
What does Sodium (Na) do for plants
Improves Photosynthesis in C4 plants
may be able to substitute for (K) to some degree
What does Cobalt (Co) do for plants
essential for nitrogen fixing bacteria in legumes
, What does Selenium (Se) do for plants
improves plant growth and is an essential element for animals that obtain Se from their feed.
Function of Nitrogen (N)
used in the synthesis of amino acids, proteins, and enzymes
found in chlorophyll, (photosynthesis) ADT and ATP (energy transfer)
Function of Phosphorus (P)
important component of energy transfer system (ADT, ATP)
Important to photosynthesis and respiration
part of cell nuclear material important to cell division
Function of Potassium (K)
accelerates growth of meristematic tissue
regulation of stomatal opening
involved in nitrogen and carbohydrate metabolism
catalyzes some enzymes
Function of Sulfur (S)
component of several amino acids (cystine, cysteine, methionine) which are part of many proteins
involved in protein synthesis and enzyme activation
forms flavor compounds in mustard garlic, and onions
How do nutrient needs change as the plant grows
During seedling stage plants are small and nutrient demand is small. As plants become larger through
the vegetative growth stage nutrient needs increase. (highest level) Nutrient needs can be high during
the reproductive stage but most of that need it met by redistribution of nutrients from the vegetative
tissues.
soil solution
Water in the soil that contains dissolved ions, molecules, and gasses. can be cations, anions, or
uncharged molecules. Nutrients are absorbed by the roots through, mass flow, diffusion, and root
interception
Cation exchange sites
positively charged ions. Held by soil clay or organic matter. Cations move to the soil solution through
cation exchange and are readily available to plants
Organic matter
can retain cationic nutrients by cation exchange and chelation. Can be a source of N, P, S when
decomposed.
Soil Minerals
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