ABSTRACT
To increase knowledge of general N, P, K and Mg fertilizer frequently used in horticulture.
background text Table 19.1
Answer the list of questions provided.
1 State the percentage nitrogen content of ammonium nitrate. 2 List an organic nitrogen fertilizer suitable for use as a base dressing prior to
planting shrubs. 3 Explain the difficulties in applying phosphorus as a fertilizer. 4 State the percentage phosphorus content and the uses of triple
superphosphate. 5 Sulphate of potash is a common garden centre retailed fertilizer. State its
nutrient content. 6 Explain why rock potash is unsuitable for use as a foliar feed. 7 Epsom salts is a very common form of magnesium fertilizer. What is its
chemical name and nutrient content? 8 Select a slow release magnesium fertilizer suitable for use as a base
dressing.
