One of the mysteries of the English language finally explained.
A mixture of chalk and ammonium nitrate, used as fertilizer.
- ‘Research has shown that for autumn sowings of onions, a lack of nitrogen in early spring can also induce bolting, so topdressing such crops with 70-100g per sq m of nitrochalk in January is helpful.’
- ‘For example, ammonium nitrate and limestone blends are prilled for the production of a fertilizer material commonly called nitrochalk, nitrolime or ammonium nitrate-limestone.’
- ‘Over-limed soils or those heavily dressed with nitrochalk are also at risk from Zn / Co unavailability.’
- ‘Both the increasing influence of calcium, nitrochalk and potassium and the decreasing influence of phosphate and ammonium salt are well-known.’
- ‘Marginal parks are dressed with nitrochalk in mid April and selected areas receive compound fertiliser in May/early June.’
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