1. Expert visit Bratislava, 31.07. – 01.08.2007 Part 2
Pesticide Indicators Transition Facility Multi-Beneficiary Statistical Cooperation Programme Lot 2
Expert visit
Bratislava, –
Part 2
Statistical Office of the Slovak Republic

2. Content of presentation
Interviews vs. postal survey
Sampling methods used in Phare 2005 project
Information on basic file (farm register, crop production statistics)
Stratification of sample
Statistical Office of the Slovak Republic

3. 1. Interviews vs. postal survey
PUS Phare 2005:
Interviews
100 units growing wheat
Made by inspectors Central Control and Testing Institute (UKSUP)
Response rate 100% (for wheat)
Survey on wheat in SR – only postal survey
1000 units
Lack of human resources
Will be made by SOSR
Lower response rate is expected
Statistical Office of the Slovak Republic

4. 2. Sampling methods used in Phare 2005 project
Area sown by wheat in 2004 = ,44 ha
Number of farms growing wheat in 2004 = 3 352
Data contain: enterprises and entrepreneurs corporated and not corporated
Data do not contain farmers not-entrepreneurs and growing by natural persons for self-consumption – sown area for these bodies is estimated on NUTS4 level, therefore they were excluded from basic file
Stratification according to area sown by wheat
Stratification on NUTS2 level
Bratislava region was jointed with West Slovak region
Statistical Office of the Slovak Republic

5. Distribution of land, sown by wheat over the Slovak Republic in 2004
Percentage of land, sown by wheat, to the total land, according to districts (NUTS4 regions) 0%
20%
Statistical Office of the Slovak Republic

6. Distribution of farms, growing wheat over the Slovak Republic in 2004
Number of farm growing wheat on 1000 ha of total land, according to districts (NUTS4 regions)
2,5
Statistical Office of the Slovak Republic

7. Sample selection criteria for wheat
Regions: 3 groups (NUTS2 regions)
West Slovakia (including Bratislava)
Middle Slovakia
East Slovakia
Farm size: 8 groups
The smallest – up to the 50 ha
The largest – more than 1000 ha
Similar sowing area in every combination with regional groups
Optimal number of samples in cells – the same percentage of sowing area in each cell
Statistical Office of the Slovak Republic

8. Sown areas of wheat and number of farms in groups in 2005 Phare project
Region (NUTS2)
SR in total
West Slovakia
Middle Slovakia
East Slovakia
Area (ha)
Number
< 50
15 608,80
1 156
6 093,52
495
7 649,60
547
29 351,91
2 198
11 978,99
164
4 497,47 62
7 896,97
109
24 373,44
335
25 849,09
177
7 460,30 51
11 291,41 80
44 600,81
308
28 954,53
118
4 834,33 20
7 201,66 29
40 990,52
167
25 920,48 74
6 843,59
8 571,33 25
41 335,40
119
29 324,85 65
4 916,33 11
7 585,13 17
41 826,31 93
48 897,75
9 502,50 15
7 968,89 12
66 369,14
101
> 1000
29 783,95 22
5 477,31 4
5 735,67 5
40 996,93 31
Total
,43
1 850
49 625,35
678
63 900,66
824
,44
3 352
Statistical Office of the Slovak Republic

9. Sample selection criteria for wheat in 2005 Phare project (2)
Sowing areas in cells
Statistical Office of the Slovak Republic

10. Sample selection criteria for wheat in 2005 Phare project (3)
Numbers of farms
Statistical Office of the Slovak Republic

11. Sample selection criteria for wheat in 2005 Phare project (4)
The number of farms in a sample (good farms)
Farm size
West
Middle
East
Total
< 50 19 11 12 42 4 1 2 7 3 5
>1000 36 18 21 75
Statistical Office of the Slovak Republic

12. Restrictions Very small sample Farms were not selected randomly
No calculation of statistical characteristics were made (standard deviation, variation coeficient)
Estimation of whole population was not possible
Farms were not selected randomly
Inspectors got only selection criteria (table on previous page)
Every inspector could choose farms (not statistical approach)
Statistical Office of the Slovak Republic

13. 3. Information on basic file (farm register, crop production statistics)
Crop production statistics is based on farm register
Maintained by SOSR
Identification information on farms
Linked with statistical business register (ID number of organization and number of branch)
Farm register contain enterprises and entrepreneurs corporated and not corporated and natural persons not-entrepreneurs which practice agricultural activities
Farm register do not contain information on natural persons growing crops for own consumption
Statistical Office of the Slovak Republic

14. Information on basic file (crop production statistics)
Possible sources of data on utilized agricultural area for wheat:
Sown area (Census of Area Sown with Crops as of May 20th) – definitive data
Estimation of harvest area (June, July)
Harvest area (September) – definitive data
The best solution is sown area (available now, definitive data)
Statistical Office of the Slovak Republic

15. Use of land Statistical Office of the Slovak Republic Use of land 2001
2001
2002
2003
2004
2005
2006
Total area of the SR (ha)
Utilized agriculture land (ha)
% of utilized agricultural area to total area
46,0
45,6
39,5
39,6
Arable land (ha)
% of arable land to UAA
62,5
61,6
61,7
70,3
69,9
69,3
Winter wheat - harvest area
% of harvest area of wheat to UAA
19,3
17,8
13,0
18,5
17,5
Statistical Office of the Slovak Republic

16. 4. Stratification of sample
Geographic stratification
On NUTS2 level (3 regions)
Stratification according to classification of farms:
According to sown area, or
According to harvest area, or
According to production in tons, or
According to production in national currency, or
According to whole agricultural area etc.
Stratification according to area sown by wheat
6 classes for sample survey (up to 500ha)
Farms above 500ha (138 farms) will be address all (similar to Stefan‘s approach)
Statistical Office of the Slovak Republic