Exam 2

Question 1

What is the consequence of continuous cropping (monoculture)?

Answer 1

Yield Reduction

Question 2

What is LSD in Ag?

Answer 2

least significant difference

Question 3

How do you tell if their is a “statistical difference” between 2 varieties of corn listed in a variety trial table?

Answer 3

If their yield in bushels has a greater difference than the LSD listed; they ARE statistically different.

Question 4

Why don’t soybeans need to be alternated in field variety trials?

Answer 4

Because they’re self-pollinated so they are won’t be affected by factors such as cross-pollination and have little height difference between varietes.

Question 5

DAP-
Composition:
Type of Fertilize:

Answer 5

18-46-0

Phosphorus

Question 6

Anhydrous Ammonium
Composition:
Type of Fertilize:

Answer 6

82-0-0

Question 7

Urea
Composition:
Type of Fertilize:

Answer 7

46-0-0

Question 8

Ammonium Nitrate-
Composition:
Type of Fertilize:

Answer 8

34-0-0

Question 9

UAN
Composition:
Type of Fertilize:

Answer 9

32-0-0(Here)/28-0-0(North)

Question 10

Triple Super Phosphate
Composition:
Type of Fertilize:

Answer 10

0-46-0

Question 11

Liquid Phosphorus
Composition:
Type of Fertilize:

Answer 11

10-34-0

Question 12

Muriate of Potassium (Potash)
Composition:
Type of Fertilize:

Answer 12

0-0-60

Question 13

2 mentioned methods of on-farm testing (variety trials) for corn

Answer 13

• split-field method

- split-planter method

Question 14

What are the 4 R’s of nutrient management?

Answer 14

• Right Rate
• Right Time
• Right Source
• Right Place

Question 15

How do you make lime recommendation using UK’s charts?

Answer 15

1)Take soil pH from test and use as water pH on chart. Take buffer pH and find where the 2 meet on 1st chart
-if they meet in between 2 number, average them.
2)Find table with given %RNV of your source of lime
3)