Sulphate of Iron

See Iron Sulphate.

  Sulphur

A major plant nutrient which is represented by the chemical symbol S. It typically forms the sixth highest percentage of any plant nutrient (excluding carbon, hydrogen and oxygen) within a turfgrass leaf, with a typical dry matter mid-range concentration being around 0.2%. It is used for general plant health but being part of the amino-acids cysteine and methionine and proteins. It is a component of some enzymes and coenzymes and contributes to the formation of chlorophyll and photosynthesis. Many fertilisers have some form of sulphur component and so this is not normally requested as an in

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  Traditional Links Fertilisers

A range of dried blood, hoof and horn and ammonium sulphate fertilisers which are based on the traditional basic principles of greenkeeping. The core is an 8.0.0 fertiliser (one being a 5:0:0) and some with 2% Fe; The nitrogen content is either 50/50 Hoof and Horn / Dried Blood; or 1/3rd each Hoof and Horn / Dried Blood / Ammonium Sulphate. A typical application rate is 25g-50g per m2. These are produced by Symbio.

  Triple Superphosphate

An inorganic source of phosphate, which is highly soluble. It contains 21% phosphorus (47% phosphate).

  Units of Fertiliser Nutrient

Reference to a standard quantity of a named fertiliser nutrient applied per unit area; this is usually given as kg per hectare. For example, 200 units of nitrogen would mean the application of 200kg of nitrogen being applied per hectare, being the equivalent of 20g/N/m². This is not the same as the quantity of fertiliser to be applied because a fertiliser analysis will be less than 100% of nitrogen. For example, applying 200 units of nitrogen using a fertiliser with an analysis of 8% would mean a total fertiliser quantity of 2,500kg to be applied.

  Urea

An artificially created 'organic' fertiliser supplying 46% of nitrogen. It is relatively quick acting and releases nitrogen over an initial 7 to 10-day period. It produces a slightly acidic reaction on a turf surface, and overuse can encourage the spread of annual meadow grass and also an increase in disease susceptibility.

  Ureaform

An inorganic, controlled release fertiliser supplying 38% of nitrogen. It is a fertiliser created from the combination of Urea and Formaldehyde. It is slow release, typically over a period of 6 months, or so. It creates a neutral reaction on a turf surface and overuse encourages the spread of annual meadow grass, weeds, earthworm activity and also an increase in disease susceptibility.

  Urease Inhibitor

A substance that inhibits the take up of water by urea, thus slowing down nutrient release. It is carried out by the enzyme urease.

  Water Insoluble Nitrogen (WIN)

A nitrogen source which can be released slowly and can then be taken up gradually by a plant. The response will typically be from 1 to 3 months, or longer. WIN fertilisers are typically be organic or synthetic controlled release ones, are usually more expensive than WSN sources and are less likely to cause leaf scorch.

  Water Soluble Nitrogen (WSN)

A nitrogen source which can be released rapidly and taken up quickly by a plant. The response will typically be for no longer than 6-weeks, if not less. WSN fertilisers are usually inorganic, relatively low cost and can also burn grass leaves if not adequately watered shortly after application.