Agriculture Sample Census Survey 2007-2008 - United Republic of Tanzania

Abstract
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The 2007/08 Agriculture Sample Census Survey (ASCS) was designed to meet the data needs of a wide range of users down to district level including policy makers at local, regional and national levels, rural development agencies, funding institutions, researchers, NGOs, farmer organisations, etc. The dataset is both more numerous in its sample and detailed in its scope and coverage, so as to meet the user demand. The census was carried out in order to:

· Identify structural changes if any, in the size of farm household holdings, crop and livestock production, farm input and implement use. It also seeks to determine if there are any improvements in rural infrastructure and in the level of agriculture household living conditions;
· Provide benchmark data on productivity, production and agricultural practices in relation to policies and interventions promoted by the Ministry of Agriculture and Food Security and other stake holders.
· Obtain benchmark data that will be used to address specific issues such as: food security, rural poverty, gender, agro-processing, marketing and service delivery.

Geographic coverage
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National Coverage

Analysis unit
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Households

Universe
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Small scale and Large Scale Farmers within the community.

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The Mainland sample consisted of 3,192 villages. The total Mainland sample was 47,880 agricultural households, while in Zanzibar a total of 317 Enumeration Areas (EAs) were selected and 4,755 agriculture households were covered.
The villages were drawn from the National Master Sample (NMS) developed by the National Bureau of Statistics (NBS) to serve as a national framework for the conduct of household-based surveys in the country. The NMS was developed from the 2002 Population and Housing Census.
The number of villages/Enumeration Areas (EAs) were selected for the first stage with a probability proportional to the number of villages/EAs in each district. In the second stage, 15 households were selected from a list of agricultural households in each Village/EA using systematic random sampling.

Mode of data collection
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Face-to-face paper [f2f]

Cleaning operations
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Data editing took place at a number of stages. The following procedures were carried out:
- Manual cleaning exercise was done prior to scanning. Questionnaires found dirty or damaged and generally unsuitable for scanning were put aside for manual data entry.
- CSPro was used for data entry of all Large Scale Farms and Community based questionnaires.
- Scanning and ICR data capture technology for the smallholder questionnaire was also done.
- There was also an interactive validation during the ICR extraction process.
- The use of a batch validation program developed in CSPro. This was used in order to identify inconsistencies within a questionnaire.
- Statistical Package for Social Sciences (SPSS) was used to produce the census tabulations.
- Microsoft Excel was used to organize the tables, charts and compute additional indicators.
- Arc GIS (Geographical Information System) was used in producing the maps.
- Microsoft Word was used in compiling and writing up the reports.

摘要
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2007/08年度农业样本普查调查（ASCS）旨在满足直至区县级别的广泛用户的数据需求，包括地方、区域和国家层面的政策制定者、农村发展机构、资助机构、研究人员、非政府组织、农民组织等。该数据集在样本数量上更加丰富，在范围和覆盖面上也更加详尽，以满足用户需求。本次普查旨在进行以下工作：
· 识别农场经营户规模、农作物和畜牧业生产、农业投入品和实施工具的使用等方面的结构性变化，同时寻求确定农村基础设施和农业家庭生活水平的改善情况；
· 提供与农业和食品安全部及其他利益相关方推广的政策和干预措施相关的生产率、生产和农业实践方面的基准数据；
· 获得用于解决特定问题的基准数据，如：粮食安全、农村贫困、性别、农产品加工、市场营销和服务交付等。
地理覆盖范围
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全国覆盖
分析单位
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家庭
总体
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社区内的中小规模和大规模农民。
数据类型
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样本调查数据 [ssd]
抽样程序
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大陆样本包括3,192个村庄。大陆样本总数为47,880个农业家庭，而在桑给巴尔，共选取了317个普查区（EAs），覆盖了4,755个农业家庭。
村庄是从国家统计局（NBS）开发的全国主样本（NMS）中抽取的，该样本用于作为国家框架，以在该国开展基于家庭的调查。NMS是从2002年人口和住房普查中开发的。
第一阶段，根据每个区内的村庄/普查区（EAs）的数量，以比例方式选择了村庄/普查区（EAs）。在第二阶段，从每个村庄/普查区中农业家庭的名单中，使用系统随机抽样方法选取了15个家庭。
数据收集方式
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面对面纸质问卷 [f2f]
数据清理操作
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数据编辑在多个阶段进行。以下程序被执行：
- 在扫描之前进行了手动清理练习。发现污损或损坏且一般不适合扫描的问卷被放置一旁以进行手动数据录入。
- 使用CSPro对所有大规模农场和基于社区的问卷进行数据录入。
- 对小规模农户问卷也进行了扫描和ICR数据捕获技术的应用。
- 在ICR提取过程中进行了交互式验证。
- 使用在CSPro中开发的批量验证程序。这用于识别问卷中的不一致性。
- 使用社会科学统计包（SPSS）生成普查表格。
- 使用Microsoft Excel组织表格、图表并计算额外的指标。
- 使用Arc GIS（地理信息系统）生成地图。
- 使用Microsoft Word汇编和撰写报告。