The quality of turf, as well as some criteria for the delivery and initial laying of turf, is identified within this standard.
Whilst the stated criteria are not designed for turf grown on specialist rootzones, they can be readily adapted for this.
A number of criteria that make up the quality of the turf are described and it is these that need to be maintained throughout the delivery period.
One potential problem with the wording in this particular standard is the use of the frequent use of the word 'should', implying guidance only, and not 'must' or 'shall' which is mandatory; this can provide a get out route for a supplier if necessary. A buyer would need to make it clear that whilst turf is to be in accordance with the standard, they may wish to insist in writing that certain criteria are definitely achieved.
To comply with the standard the seller has to initially state either:
- the seed mixture sown, with the turf containing at least 95% ground cover of that stated; or
- the approximate composition, to be at least to within 10% for each species, of the sward at the time of the sale.
Other criteria that should be achieved are:
- the grass to have been mown on a regular basis, with the maximum height prior to lifting being 35mm;
- the turf to be dense; a healthy green colour and not visibly affected by disease or insect pests;
- the soil to have a maximum of 30% clay;
- the soil to have a maximum of 50% silt;
- the lifted turf to have a maximum of 10mm of thatch;
- each turf to weigh no more than 20 kg.
The buyer should ideally ensure that they are aware of the soil texture prior to making an order. Reputable suppliers will provide this information.
For more specialist use, such as for on a sportsturf area, the provision of a particle size analysis of the soil on which the turf is grown would be recommended. This would be used by a potential buyer to assess compatibility with the soil onto which the turf is to be laid.
Cut turf should be delivered to the buyer's site within 24 hours of lifting and should then be laid within 18 - 24 hours depending upon the season.
A number of test methods are included as Appendices, including sampling of turves, estimation of ground cover and thatch depth.