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Latvia
The methodological description for Latvia is valid for the period since 1995.
Livestock surveys
Surveys on the number of pigs
Number of the pig surveys
In Latvia 2 surveys on the number of pigs are carried out per year.
Months in which pig surveys are carried out
June and November
Separate / integrated pig surveys
The surveys are integrated livestock surveys.
Sample / full pig surveys
Full surveys are carried out in enterprises.
Sample surveys are carried out on private farms.
The average sampling error in the recent years
Sampling error is not estimated.
Last full survey
The last full survey of pig population was carried out in 1985 (to 1985 every 5 years).
Sampling method
The base for the sample frame is the farm register. The sample frame covers all farms with at least 1 ha of agricultural area utilised.
Since 1998 single stage stratified simple random sampling is used. By attributing data of the surveyed farms to all private farms, attention was paid to how many farms of a similar kind were represented by the farms in the sample as well as to the actual response rate in each of the surveyed territories.
All private farms are stratified by territory (510 smallest administrative territories) and by the size groups of utilised agricultural area (6 groups). Within each administrative territory the sample is allocated between 5 size groups (private farms with less than 1 ha of utilised agricultural area are not included in the sample). In 2000 the total number of non-empty strata was equal to 2746. In 2000 the total sample size was equal to 12856 (10% of total number of private farms). The sampling fraction varies between 100% and 40% for farms with utilised agricultural area over 100 ha, between 100% and 25% for farms with utilised agricultural area over 50 and less than 100 ha, between 100% and 7.5% for farms with utilised agricultural area over 20 and less than 50 ha, between 100% and 4.5% for farms with utilised agricultural area over 10 and less than 20 ha, between 87.5% and 3% for farms with utilised agricultural area over 5 and less than 10 ha, and between 70% and 1.4% for farms with utilised agricultural area over 1 and less than 5 ha. Within each stratum the selection of private farms is made by a simple random sampling.
Percentage of the total pig population recorded by the sample survey
By the sample surveys 42.3 % of the total pig population is recorded.
Number of holdings recorded by the sample and percentage of the total number of the holdings breeding pigs
By the sample surveys 5291 private farms are recorded which is 10.4% of all private farms breeding pigs.
Surveys in selected regions
All surveys are carried out in all 510 civil parishes (the smallest administrative units).
Method used for estimating the pig population not recorded by the sample surveys
Pig population parameters are estimated by Horvitz-Tompson estimator based on information collected from the sampled holdings.
Estimate of population total of some variables is calculated as weighted sum of the values of this variable taken over all responding holdings. The weight of a holding is calculated as the inverse number of the inclusion probability of holding in the sample.
Estimate of a ratio of two population totals is calculated as ratio of estimates of these two totals.
Average response rate
Average response rate in the surveys is 96.9 %.
Treatment of non response
Adjustment for non-response is made at the stage of calculation of weights - within each stratum the weight of a sampled holding is calculated as a ratio of the stratum size (number of holdings in a stratum) and the number of responding holdings in this stratum.
Mode of data collection
Data on private farms are obtained by oral interviews with farmers, while data on enterprises are obtained by written inquiries.
Institution responsible for the survey
Central Statistical Bureau of Latvia
Use of administrative sources instead of pig surveys in the next 5 years
Yes. Available sources: Pig register at the Ministry of Agriculture.
Surveys on the number of cattle
Number of the cattle surveys
In Latvia 2 surveys on the number of cattle are carried out per year.
Months in which cattle surveys are carried out
June and November
Separate / integrated cattle surveys
The surveys are integrated livestock surveys.
Sample / full cattle surveys
Full surveys are carried out in enterprises.
Sample surveys are carried out on private farms.
The average sampling error in the recent years
Sampling error is not estimated.
Last full survey
The last full survey of cattle population was carried out in 1985 (to 1985 every 5 years).
Sampling method
The base for the sample frame is the farm register. The sample frame covers all farms with at least 1 ha of agricultural area utilised.
Since 1998 single stage stratified simple random sampling is used. The sample frame covers all farms with at least 1 ha of utilised agricultural area. By attributing data of the surveyed farms to all private farms, attention was paid to how many farms of a similar kind were represented by the farms in the sample as well as to the actual response rate in each of the surveyed territories.
All private farms are stratified by territory (510 smallest administrative territories) and by the size groups of utilised agricultural area (6 groups). Within each administrative territory the sample is allocated between 5 size groups (private farms with less than 1 ha of utilised agricultural area are not included in the sample). In 2000 the total number of non-empty strata was equal to 2746. In 2000 the total sample size was equal to 12856 (10% of total number of private farms). The sampling fraction varies between 100% and 40% for farms with utilised agricultural area over 100 ha, between 100% and 25% for farms with utilised agricultural area over 50 and less than 100 ha, between 100% and 7.5% for farms with utilised agricultural area over 20 and less than 50 ha, between 100% and 4.5% for farms with utilised agricultural area over 10 and less than 20 ha, between 87.5% and 3% for farms with utilised agricultural area over 5 and less than 10 ha, and between 70% and 1.4% for farms with utilised agricultural area over 1 and less than 5 ha. Within each stratum the selection of private farms is made by a simple random sampling.
Percentage of the total cattle population recorded by the sample survey
By the sample surveys 29.5 % of the total cattle population is recorded.
Number of holdings recorded by the sample and percentage of the total number of the holdings breeding cattle
By the sample surveys 8343 private farms are recorded which is 9.8% of all private farms breeding cattle.
Surveys in selected regions
All surveys are carried out in all 510 civil parishes (the smallest administrative units).
Method used for estimating the cattle population not recorded by the sample surveys
Cattle population parameters are estimated by Horvitz-Tompson estimator based on information collected from the sampled holdings.
Estimate of population total of some variables is calculated as weighted sum of the values of this variable taken over all responding holdings. The weight of a holding is calculated as the inverse number of the inclusion probability of holding in the sample.
Estimate of a ratio of two population totals is calculated as ratio of estimates of these two totals.
Average response rate
Average response rate in the surveys is 96.9 %.
Treatment of non response
Adjustment for non-response is made at the stage of calculation of weights - within each stratum the weight of a sampled holding is calculated as a ratio of the stratum size (number of holdings in a stratum) and the number of responding holdings in this stratum.
Mode of data collection
Data on private farms are obtained by oral interviews with farmers, while data on enterprises are obtained by written inquiries.
Institution responsible for the survey
Central Statistical Bureau of Latvia
Use of administrative sources instead of cattle surveys in the next 5 years
Yes.
Available sources: Cattle register at the Ministry of Agriculture.
Surveys on the number of sheep and goats
Number of the sheep and goats surveys
In Latvia 2 surveys on the number of sheep and goats are carried out per year.
Months in which sheep and goats surveys are carried out
June and November
Joint / separate recording of sheep and goat populations
Sheep and goat populations are recorded jointly.
Separate / integrated sheep and goats surveys
The surveys are integrated livestock surveys.
Sample / full sheep and goats surveys
Full surveys are carried out in enterprises.
Sample surveys are carried out on private farms.
The average sampling error in the recent years
Sampling error is not estimated.
Last full survey
The last full survey of sheep and goat populations was carried out in 1985 (to 1985 every 5 years).
Sampling method
The base for the sample frame is the farm register. The sample frame covers all farms with at least 1 ha of agricultural area utilised.
Since 1998 single stage stratified simple random sampling is used. The sample frame covers all farms with at least 1 ha of utilised agricultural area. By attributing data of the surveyed farms to all private farms, attention was paid to how many farms of a similar kind were represented by the farms in the sample as well as to the actual response rate in each of the surveyed territories.
All private farms are stratified by territory (510 smallest administrative territories) and by the size groups of utilised agricultural area (6 groups). Within each administrative territory the sample is allocated between 5 size groups (private farms with less than 1 ha of utilised agricultural area are not included in the sample). In 2000 the total number of non-empty strata was equal to 2746. In 2000 the total sample size was equal to 12856 (10% of total number of private farms). The sampling fraction varies between 100% and 40% for farms with utilised agricultural area over 100 ha, between 100% and 25% for farms with utilised agricultural area over 50 and less than 100 ha, between 100% and 7.5% for farms with utilised agricultural area over 20 and less than 50 ha, between 100% and 4.5% for farms with utilised agricultural area over 10 and less than 20 ha, between 87.5% and 3% for farms with utilised agricultural area over 5 and less than 10 ha, and between 70% and 1.4% for farms with utilised agricultural area over 1 and less than 5 ha. Within each stratum the selection of private farms is made by a simple random sampling.
Percentage of the total sheep and goat populations recorded by the sample survey
By the sample surveys 12.6 % of the total sheep population and 8.5 % of the total goat population are recorded.
Number of holdings recorded by the sample and percentage of the total number of the holdings breeding sheep and goats
By the sample surveys 744 (9.8%) private farms breeding sheep and 298 (8.0%) private farms breeding goats are recorded.
Surveys in selected regions
The surveys are carried out in all 510 civil parishes (the smallest administrative units).
Method used for estimating the sheep and goat populations not recorded by the sample surveys
Sheep and goat populations parameters are estimated by Horvitz-Tompson estimator based on information collected from the sampled holdings.
Estimate of population total of some variables is calculated as weighted sum of the values of this variable taken over all responding holdings. The weight of a holding is calculated as the inverse number of the inclusion probability of holding in the sample.
Estimate of a ratio of two population totals is calculated as ratio of estimates of these two totals.
Average response rate
Average response rate in the surveys is 96.9 %.
Treatment of non response
Adjustment for non-response is made at the stage of calculation of weights - within each stratum the weight of a sampled holding is calculated as a ratio of the stratum size (number of holdings in a stratum) and the number of responding holdings in this stratum.
Mode of data collection
Data on private farms are obtained by oral interviews with farmers, while data on enterprises are obtained by written inquiries.
Institution responsible for the survey
Central Statistical Bureau of Latvia
Use of administrative sources instead of sheep and goats surveys in the next 5 years
No.
Comments on livestock surveys
For state farms and statutory companies the data source of data on the number of livestock and animal production are the full statistical surveys.
The livestock survey of private farms is part of sample survey which was first launched in 1995 and since then is conducted twice a year: on 1 June and 1 November (the same sampled holdings/private farms are surveyed in both waves of the same calendar year). This survey is made as a part of the annual agricultural structure survey. On 1 June the questionnaire contains questions on the following blocks of statistical data: farm characteristics, land area and its use, sown areas, the number of livestock, animal production, stock of agricultural machinery in farm and financial indications of economic activity. The survey on 1 November in addition includes extra information on crop production, fruit trees and berry bushes, covered areas, labour force resources and use of fertilisers and pesticides.
For the construction of the sample, the procedure of stratified two-stage sampling was applied. Since 1998 single stage stratified simple random sampling is used.
Since 1997 Latvia has changed registration groups in livestock statistics, that makes statistical data comparable with the EU requirements, but full compliance is planned to be reached after Agricultural Census 2001.
After Agricultural Census 2001 Farm Register with livestock information will be supplemented and then this information will be used for integrated livestock sample survey.
Slaughtering data
Availability of monthly data on slaughterings
Weight
1Data on number of slaughtered animals and slaughterweight are available for slaughterhouses only.
Procedure used for recording slaughtering data
The data source of monthly slaughtering statistics is the surveys on purchase of cattle, poultry and rabbits (number, weight and value). This data submit all slaughterhouses.
The responsible institution for producing slaughtering data is CSB. The data are available at 20th day after reporting period.
The data about domestic slaughtering is obtained twice per year from sample surveys (on 1 June and 1 November) of private farms. After those surveys the data are corrected by month.
Foreign trade data for live animals
Procedure used for recording foreign trade data
Foreign trade data is compiled on the basis of information taken from customs declarations and statistical surveys every month. There are no reporting thresholds. Merchandise exports are shown in current F.O.B. values, that is, the price of a commodity on the border of the exporting country including the transportation and insurance costs only up to the border. Merchandise imports are shown in current C.I.F. values, that is, the price of a commodity on the border of the importing country including the transportation and insurance costs only up to the border. The imported and exported merchandise is classified according to the Latvian Combined Commodity Nomenclature. This is a description and coding system formed on the basis of the Harmonised Commodity Description and Coding System and the EC Combined Nomenclature. The foreign trade data for live animals has prepared by Foreign Trade section of CSB of Latvia. In general this data is available at 40th day after reference period, but detailed - at 50th day. In general the categories of foreign trade statistics are comparable with EU directives.
Production forecasts (gross domestic production)
Methods used for calculating production forecasts for pigs, cattle, sheep and goats
Monthly forecasts for meat, milk and eggs production are calculated. These calculations are based on monthly surveys from state farms and statutory companies, which compile about 30% of total production. The other part of production is added on base of sample surveys of private farms (they are conducted twice a year: in June and in November). After these surveys monthly data are corrected.
Poultry statistics
Information available in the field of poultry statistics
The data on poultry slaughtering is part of monthly survey in slaughterhouses. The hens for production of meat and eggs are mostly bred in state farms and statutory companies. This data is collected every month. The data from private farms is obtained from sample surveys twice a year (June, November).
Since 1998 EU coefficients are used for calculating carcass weight of all types of meat production.