Nutrients

Question 1

Nitrogen fertilisers.

Ammonium sulphate.

Answer 1

Acid reaction in growing medium.

Often used in conjunction with ferrous sulphate to achieve very green turf.

Question 2

Nitrogen.

Fertilisers

Answer 2

Ammonium nitrate.
Rapidly absorbs moisture to become wet, cakes when drying.
Fire risk.
Can be safely handled as perils and in polythene sacks.

Question 3

Nitrogen.

Fertiliser- urea

Answer 3

High nitrogen content.
Releases ammonia in contact with water.
Usually used as liquid fertiliser, can be used as foliage feed.

Question 4

Nitrogen

Controlled release fertilisers

Answer 4

Urea coated with sulpher - controlled release fertiliser and acid reaction.
Urea formaldehydes, isobutylidene urea, crotonylidene.

Question 5

Nitrogen

Natural organic sources.

Answer 5

Dried blood, hoof and horn.

Generally slow release but quicker in warm conditions eg. Glass house.

Question 6

Phosphorus fertilisers.

Slow action

Answer 6

Rock phosphate.
Bone meal.

Finely ground.

Applied to grassland, tree plantings and preparing borders..

Question 7

Water soluble phosphates

Answer 7

Superphosphate -rock phosphate treated with sulphuric acid, composed of water soluble sulphate and calcium sulphate.

Triple superphosphate, derived from phosphoric acid treatment.