FERTILIZER APPLICATION
CERTIFICATION PAPER FINAL WITH
ACCURATE ANSWERS
● How many soil cores should be collected for nutrient analysis?
Answer: Six to ten cores from representative locations.
● What is the typical sampling depth for soil analysis? Answer: 10 to 20
cm (4 to 8 in), depending on the concentration of fine roots.
● What should be done with soil cores after collection? Answer: Mix
them together in a clean, nonmetallic container or soil sample bag.
● Why is foliar analysis valuable in conjunction with soil analysis?
Answer: It provides information about nutrients absorbed by the plant
and helps identify deficiencies.
● What is a complete fertilizer? Answer: A fertilizer that contains
nitrogen (N), phosphorus (P), and potassium (K).
● How is fertilizer analysis expressed? Answer: As a percentage by
weight of total nitrogen (N), available phosphate (P₂O₅), and soluble
potash (K₂O).
, ● What does a fertilizer analysis of 10-2-4 indicate? Answer: It contains
10% nitrogen, 2% phosphate, and 4% potash.
● What is the fertilizer ratio, and how is it calculated? Answer: The ratio
is calculated by dividing each analysis number by the lowest number in
the group.
● What are the two forms of fertilizers? Answer: Organic and inorganic
forms.
● What is an advantage of organic fertilizers? Answer: They provide a
carbon source for soil organisms and are less likely to leach from the
soil.
● What is 'fertilizer burn'? Answer: A condition caused by excess
nutrient concentration drawing water out of the roots.
● What is the preferred percentage of water-insoluble nitrogen (WIN)
for trees? Answer: 50% or more of the total nitrogen.
● What are secondary macronutrients? Answer: Sulfur, calcium, and
magnesium.
● What is the common treatment for calcium and magnesium
deficiencies? Answer: Application of dolomitic limestone.
CERTIFICATION PAPER FINAL WITH
ACCURATE ANSWERS
● How many soil cores should be collected for nutrient analysis?
Answer: Six to ten cores from representative locations.
● What is the typical sampling depth for soil analysis? Answer: 10 to 20
cm (4 to 8 in), depending on the concentration of fine roots.
● What should be done with soil cores after collection? Answer: Mix
them together in a clean, nonmetallic container or soil sample bag.
● Why is foliar analysis valuable in conjunction with soil analysis?
Answer: It provides information about nutrients absorbed by the plant
and helps identify deficiencies.
● What is a complete fertilizer? Answer: A fertilizer that contains
nitrogen (N), phosphorus (P), and potassium (K).
● How is fertilizer analysis expressed? Answer: As a percentage by
weight of total nitrogen (N), available phosphate (P₂O₅), and soluble
potash (K₂O).
, ● What does a fertilizer analysis of 10-2-4 indicate? Answer: It contains
10% nitrogen, 2% phosphate, and 4% potash.
● What is the fertilizer ratio, and how is it calculated? Answer: The ratio
is calculated by dividing each analysis number by the lowest number in
the group.
● What are the two forms of fertilizers? Answer: Organic and inorganic
forms.
● What is an advantage of organic fertilizers? Answer: They provide a
carbon source for soil organisms and are less likely to leach from the
soil.
● What is 'fertilizer burn'? Answer: A condition caused by excess
nutrient concentration drawing water out of the roots.
● What is the preferred percentage of water-insoluble nitrogen (WIN)
for trees? Answer: 50% or more of the total nitrogen.
● What are secondary macronutrients? Answer: Sulfur, calcium, and
magnesium.
● What is the common treatment for calcium and magnesium
deficiencies? Answer: Application of dolomitic limestone.
