Pesticide usage - rodenticides on arable farms 2018: survey results
Information from a survey of rodenticide use on arable farms in Scotland in 2018.
Appendix 2 - Survey statistics
Census and sample information
Table 6 Distribution of arable holdings sampled in Scotland - 2018
| Size Group (ha) | H & I and C & O | Moray Firth | Aberdeen | Angus | East Fife & Lothian | Central Lowlands | TV, SU & Solway | Scotland |
|---|---|---|---|---|---|---|---|---|
| 0.01 - 19.99 | 6 | 1 | 4 | 1 | 2 | 4 | 4 | 22 |
| 20.00 - 49.99 | 2 | 3 | 9 | 5 | 4 | 7 | 6 | 36 |
| 50.00 - 99.99 | 2 | 6 | 16 | 10 | 12 | 6 | 7 | 59 |
| 100.00 - 149.99 | 3 | 6 | 17 | 12 | 12 | 4 | 15 | 69 |
| 150.00 + | 0 | 11 | 11 | 21 | 20 | 10 | 13 | 86 |
| Total | 13 | 27 | 57 | 49 | 50 | 31 | 45 | 272 |
Table 7 Census distribution of arable holdings in Scotland - 2018
| Size Group (ha) | H & I and C & O | Moray Firth | Aberdeen | Angus | East Fife & Lothian | Central Lowlands | TV, SU & Solway | Scotland |
|---|---|---|---|---|---|---|---|---|
| 0.01 - 19.99 | 1,369 | 364 | 840 | 272 | 202 | 506 | 439 | 3,992 |
| 20.00 - 49.99 | 132 | 227 | 561 | 313 | 185 | 282 | 283 | 1,983 |
| 50.00 - 99.99 | * | 157 | 423 | 286 | 228 | 184 | 175 | 1,496 |
| 100.00 - 149.99 | * | 81 | 154 | 152 | 153 | * | 107 | 724 |
| 150.00 + | * | 80 | 146 | 184 | 160 | * | 156 | 793 |
| Total | 1,564 | 909 | 2,124 | 1,207 | 928 | 1,096 | 1,160 | 8,988 |
* To prevent disclosure of information about individual holdings, entries relating to fewer than five holdings are not reported
H&I=Highlands & Islands, C&O=Caithness & Orkney, TV=Tweed Valley, SU=Southern Uplands
Raising factors
Table 8 Raising and adjustment factors for arable holdings - 2018
| Region | Size group (ha) | Adjustment factor | ||||
|---|---|---|---|---|---|---|
| 0.01 - 19.99 | 20.00 - 49.99 | 50.00 - 99.99 | 100.00 - 149.99 | 150 + | ||
| Highlands & Islands/Caithness & Orkney | 228.1667 | 66.0000 | 21.5000 | 5.3333 | 1.0026 | |
| Moray Firth | 364.0000 | 75.6667 | 26.1667 | 13.5000 | 7.2727 | 1.0000 |
| Aberdeen | 210.0000 | 62.3333 | 26.4375 | 9.0588 | 13.2727 | 1.0000 |
| Angus | 272.0000 | 62.6000 | 28.6000 | 12.6667 | 8.7619 | 1.0000 |
| East Fife & Lothian | 101.0000 | 46.2500 | 19.0000 | 12.7500 | 8.0000 | 1.0000 |
| Central Lowlands | 126.5000 | 40.2857 | 30.6667 | 15.2500 | 6.3000 | 1.0000 |
| Southern Uplands, Tweed Valley & Solway | 109.7500 | 47.1667 | 25.0000 | 7.1333 | 12.0000 | 1.0000 |
Note: The sampled data within a region and size group were multiplied by the appropriate raising and adjustment factors to create an estimate of national use (please refer to Appendix 4 for description of statistical estimation process). For example, a total recorded rodenticide use of 10 kg on 100-150 ha sized farms in Aberdeen would be multiplied by 9.0588(raising factor) and 1.00 (adjustment factor) to give an estimated rodenticide use in that region and size group of 90.59 kg.
Survey response rates
Table 9 Response rate for arable rodenticide survey - 2018
| 2018 | Percentage of total | |
|---|---|---|
| Target sample | 350 | |
| Total achieved | 272 | 78 |
| Total number of farms approached | 563 | |
| Total number of refusals/non-contact | 291 |
Financial burden to survey respondents
In order to minimise the burden on farmers, the survey team use non-visit methods of data collection such as email, post or telephone call, where possible.
To determine the total burden that the 2018 rodenticide use on arable farms survey placed on those providing the information, farmers were asked to estimate the time that they spent providing data. 90 per cent of the farmers surveyed provided this information. The median time taken was two minutes.
In addition, PCPs were also asked to estimate how long they took to provide information. 95 per cent of the PCPs supplying data provided this information. The median time taken was 15 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” hourly pay for Scotland of £14.48(9))
It is estimated that the total financial burden to respondents for the 2018 arable crop rodenticide survey was £203.69.
Contact
Email: psu@sasa.gov.scot
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