Land management lecture 4

Question 1

Nutrients in soil

Answer 1

Macro nutrients (minerals): N,P,S,K

Question 2

Why is nitrogen important

Answer 2

For growth. Nitrogen is important for protein. Protein is essential for growth and development. Nitrogen is a component of nucleic acid, DNA, RNA, genes and chromosomes

Question 3

Use of catch crops/green manures

Answer 3

Improved evaporation
Improved infiltration
Soil cover
N-recovery

Question 4

Common mineral fertilizer on grassland and maize:

Answer 4

Kas kakammonsalpeter

Ureum

Question 5

Organic fertilizers on grassland and maize

Answer 5

Diary manure

Farm yard, pig manure

Question 6

Which fields get the most fertilizer

Answer 6

The high producing fields, so they keep on producing.

The low producing fields, so they improve

Question 7

Two options how to cut on fertilization

Answer 7

Reduce N-rate proportionally to N-mineralization

Apply equal N-rate to all fields