Census of Agriculture, 2009-2010 - Mozambique

Geographic coverage
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National coverage

Analysis unit
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Households

Universe
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The statistical unit was the agricultural holding, defined as an economic unit of agricultural production under single management based on the use of land for agricultural production, without regard to the legal aspects of ownership (title) or size.

Kind of data
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Census/enumeration data [cen]

Sampling procedure
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i. Methodological modality for conducting the census
The modular approach was used in the CA, covering six supplementary modules: (i) Crops; (ii) Livestock; (iii) Farm labour; (iv) Aquaculture; (v) Food security; and (vi) Agricultural practices and agricultural services. The CPH 2007 included an agriculture module that served as a core module for the CA 2009/2010.

ii. Frame
The frame consisted of all agricultural households identified during the CPH 2007. Based on the CPH data, 45 279 EAs were delineated for the CA 2009/2010. A special list frame was developed to identify the large farm holdings in each district. A total of 884 large farms were enumerated in the CA 2009/2010. These farms were excluded from the sampling frame, to avoid duplication.

iii. Complete and/or sample enumeration methods
Sample enumeration was used for supplementary modules.

iv. Sample design
Two-stage sampling was used for supplementary modules. A sample of more than 40 000 farm holdings (approximately 35 020 small holdings and 3 500 medium-size holdings) was selected. Large holdings were surveyed in their entirety (100 percent, throughout the country). During the first sampling stage, the EAs were selected systematically, with probability proportional to size (PPS) within each stratum (district, urban and rural). The measures of size were based on the number of agricultural households in the EA from the CPH 2007. All of the medium-sized holdings identified in the listing were included in the sample with certainty in the second sampling stage. A random systematic sample of ten small holdings was selected, with equal probability in each sampled EA.

Mode of data collection
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Computer Assisted Personal Interview [capi]

Research instrument
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There were two types of electronic questionnaires:

1. for small- and medium-sized agricultural households
2. for large farms.

The questionnaires enabled data collection for six supplementary modules. All 16 core items recommended in the WCA 2010 were covered in the CA, namely:

0001 Identification and location of agricultural holding
0002+ Legal status of agricultural holder
0003 Sex of agricultural holder
0004 Age of agricultural holder
0005 Household size
0006 Main purpose of production of the holding
0007 Area of holding according to land use types
0008 Total area of holding
0009 Land tenure types on the holding
0010 Presence of irrigation on the holding
0011 Types of temporary crops on the holding
0012 Types of permanent crops on the holding and whether in compact plantation
0013 Number of animals on the holding for each livestock type
0014 Presence of aquaculture on the holding
0015+ Presence of forest and other wooded land on the holding
0016 Other economic production activities of the holding’s enterprise

Cleaning operations
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1. DATA PROCESSING AND ARCHIVING
Data entry, including preliminary data edits, was done in the field on notebooks by the enumerators, at the time of the interview. The data were then transferred electronically in email attachments to the data processing centre, where they were subjected to a second editing process. Each questionnaire was backed up on a memory stick and then backed up a second time (a backup to the backup). The software packages used were CSPro, SPSS and STATA, among others.

2. CENSUS DATA QUALITY
To ensure that the census data were accurate, control procedures were set up throughout data collection and processing to control sampling and non-sampling errors.

地理覆盖范围
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国家覆盖范围
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分析单位
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家庭
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总体
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统计单元为农业经营，定义为基于土地用于农业生产而形成的单一管理经济单元，不考虑所有权（产权）或规模的法律法规方面。
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数据类型
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人口普查/枚举数据 [cen]
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抽样程序
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i. 进行普查的方法论模式
在CA中采用了模块化方法，包括六个补充模块：（i）农作物；（ii）畜牧业；（iii）农场劳动；（iv）水产养殖；（v）粮食安全；（vi）农业实践和农业服务。CPH 2007中包含了一个农业模块，该模块作为CA 2009/2010的核心模块。
ii. 调查框架
调查框架包括CPH 2007期间确定的全部农业家庭。根据CPH数据，为CA 2009/2010划定了45 279个选举区。为识别每个地区的的大型农场，开发了一个特殊清单框架。CA 2009/2010共统计了884个大型农场。这些农场被排除在抽样框架之外，以避免重复。
iii. 完全和/或抽样枚举方法
补充模块采用了抽样枚举。
iv. 抽样设计
补充模块采用了两阶段抽样。选择了超过40 000个农场经营单位（约35 020个小经营单位和3 500个中等规模经营单位）作为样本。大型经营单位在全国范围内进行了全面调查（100%）。在第一阶段抽样中，选举区采用系统抽样方法，并在每个层（地区、城市和农村）内按规模比例抽样（PPS）。规模度量基于CPH 2007中选举区的农业家庭数量。在第二阶段抽样中，所有在清单中确定的中小型经营单位都肯定包含在样本中。在每个抽样选举区中，对十个小型经营单位进行了随机系统抽样，概率均等。
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数据收集方式
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计算机辅助个人访谈 [capi]
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研究工具
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有两种类型的电子问卷：
1. 用于小型和中型农业家庭
2. 用于大型农场。
这些问卷使数据收集覆盖了六个补充模块。CA涵盖了WCA 2010中推荐的所有16个核心项目，即：
0001 农业经营单位识别和位置
0002+ 农业持有者法律状态
0003 农业持有者性别
0004 农业持有者年龄
0005 家庭规模
0006 经营单位生产的主要目的
0007 按土地用途类型的经营单位面积
0008 经营单位总面积
0009 经营单位上的土地权属类型
0010 经营单位上的灌溉情况
0011 经营单位上的临时作物类型
0012 经营单位上的永久作物类型及其是否为密集种植
0013 每种牲畜类型在经营单位上的动物数量
0014 经营单位上的水产养殖情况
0015+ 经营单位上的森林和其他林地情况
0016 经营单位企业的其他经济生产活动
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数据清理操作
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1. 数据处理和存档
数据录入，包括初步数据编辑，由调查员在访谈时在现场笔记本上进行。然后，数据以电子邮件附件的形式电子传输到数据处理中心，在那里进行了第二次编辑。每个问卷都备份到U盘上，然后再次备份（备份的备份）。使用的软件包包括CSPro、SPSS和STATA等。
2. 人口普查数据质量
为确保普查数据的准确性，在数据收集和处理过程中设置了控制程序，以控制抽样和非抽样误差。