Appendix 2 - Survey statistics
Census and sample information
Table 12 Estimated crop area
Census area (ha) of permanently protected crops grown in Scotland
|All protected edible||11.34||14.83||-24|
Note: Data taken from the 2015 and 2013 June Agricultural Census. All areas exclude multi-cropping.
Table 13 Sample & census areas (ha) of protected edible crops in Scotland
|Crop||Census areas||Sampled areas||% Census area sampled|
|All edible crops||11.34||1.82||16|
Note: Data taken from the 2015 June Agricultural Census. All areas exclude multi-cropping.
Table 14 Distribution of sample
Number of holdings sampled in each region
|Highlands & Islands||Caithness & Orkney||Moray Firth||Aberdeen||Angus||East Fife||Lothian||Central Lowlands||Tweed Valley||Southern Uplands||Solway||Scotland|
Table 15 Raising factors
Note: Raising factors are calculated by comparing the sampled crop area to the census crop area. Please see Appendix 4 - survey methodology for a full explanation.
The table below summarises the number of holdings which were contacted during the survey.
Table 16 Response rate
|Target sample (no. of holdings)||16||100|
|Total number of refusals/non-contact||5|
|Total number of farms approached||21|
Financial burden to growers
In order to minimise the burden on farmers the survey uses non-visit methods of collection, such as email, post or telephone call, where possible.
To determine the total burden the 2015 Protected Edible Crop survey placed on those providing the information, the surveyors recorded the time that 15 respondents spent providing the data during the survey. This sample represents 94 per cent of growers surveyed. The median time taken to provide the information was 10 minutes.
The following formula was used to estimate the total cost of participating:
Burden (£) = No. surveyed x median time taken (hours) x typical hourly rate*
(* using median "Full Time Gross" pay for Scotland of £13.45) 3
The total financial burden to all growers resulting from participation in the 2015 Scottish Protected Edible Survey was calculated to be £34.