FERTILIZER APPLICATION - Week 12

Question 1

Percent of Nitrogen in: Urea

Answer 1

46%

Question 2

Percent of Nitrogen in: Anhydrous ammonia

Answer 2

82%

Question 3

Percent of Nitrogen in: Ammonium Nitrate

Answer 3

33%

Question 4

Solution Fertilizers

Answer 4

• dissolved or suspended in water
• can sometimes be mixed with other components
• sprayed on the soil surface

Question 5

Dry Fertilizers

Answer 5

• powder, granules, pills, slow release

- applied to the soil, usually with some sort of drill and often added at planting time

Question 6

What is the Haber Bosch process?

Answer 6

• industrial production of Nitrogen for fertilizers that uses natural gas and N2 from the air
• higher Natural Gas prices&raquo_space; higher fertilizer prices

Question 7

Types of fertilizer

Answer 7

• Mineral – rock powders – low nutrient
• Organic – contains hydrocarbons – from living things (plant or animal) – often low nutrient
• Synthetic – chemically produced organic - high nutrient
• Inorganic – mined or manufactured – no HCs – high nutrient

Question 8

Application of fertilizer: 2 methods used pre-planting

Answer 8

• Broadcast – Spread on surface (liquid or dry) P & K must be tilled in
• Injection – chisels place liquids beneath the surface

Question 9

Application of Fertilizer: During planting

Answer 9

• Banding – 2” down & 1” to the side of seed – more growth with less fertilizer - common
• Pop Up – in row with seed – hi P and low in salt & ammonia

Question 10

Application of Fertilizer: When transplanting

Answer 10

-hand applied water with dissolved fertilizer

Question 11

Application of Fertilizer: Post-planting

Answer 11

• Topdressing – over soil once plants are established
• Sidedressing – liquid or dry addition to the side of row crops (split application)
• Fertigation – irrigation water with dissolved fertilizer
• Foliar – sprays on leaves

Question 12

Type of fertilizer that LOWERS (acidifies) the pH

Answer 12

Ammonia fertilizers&raquo_space; lower pH (roots release H+ ions)

Question 13

Type of fertilizer that RAISES (makes basic) the pH

Answer 13

Nitrate Ferts&raquo_space; raise pH (roots release hydroxide HO- ions)

Question 14

What does the Calcium Carbonate Equivalent mean?

Answer 14

= pounds of Calcium Carbonate that will be neutralized by one ton of fertilizer

Question 15

Most fertilizers are different kinds of __________?

Answer 15

salt

Question 16

What are the MACROnutrients

Answer 16

“C. Hopkins Cafe – Mighty Good”

C H O P K N Ca Fe Mg