Monthly Palay and Corn Situation Reporting System 2009 - Philippines

Abstract
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The Bureau of Agricultural Statistics (BAS) has been monitoring the palay and corn situation in the country through a Monthly Palay and Corn Situation Reporting System (MPCSRS) since 1985. The activity aims primarily to update the forecasts (based on standing crop and planting intentions) generated through the Palay and Corn Production Survey (PCPS). Based on the findings of the MPCSRS, the BAS submits a memorandum to the office of the Secretary, Department of Agriculture to inform him of the latest production status of palay and corn.

Geographic coverage
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National coverage

Analysis unit
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Agricultural holdings

Universe
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MPCSRS covers palay and corn farming households with at least 0.100 hectare or 1000 square meters of operation.

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The MPCSRS is conducted monthly in between the Palay Production Survey (PPS)/Corn Production Survey (CPS) rounds, making use of one replicate of the PPS/PCS as sample such that:

- For pure palay provinces, one replicate consisting of ten (10) barangays is taken from the PPS samples.
- For pure corn provinces, one replicate consisting of ten (10) barangays is taken from the CPS samples.
- For overlap (that is palay and corn) provinces, five (5) barangays is taken from the PPS and another five (5) barangays are taken from the CPS samples yielding only one sample of barangays for the province.
- For minor palay or corn provinces, one replicate consisting of five (5) barangays are taken as samples.
- For non-corn provinces, one replicate of the PPS barangay samples is taken as samples for the MPCSRS.

All households in the selected barangays are enumerated. Currently, the MPCSR has a total sample size of 680 barangays nationwide. The replicates are selected using probability proportional to size based on total palay/corn areas.

Details of the documentation of the Palay Production Survey (PPS) and Corn Production Survey (CPS) sampling procedure can be viewed from the BAS Electronic Archiving and Network Services, http://beans.bas.gov.ph.

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

Cleaning operations
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Manual coding and editing are done at the Provincial Operations Centers (POCs). At the POCs, during the electronic data processing, checking of household serial numbers based on the masterlist of samples, consistency checks based on data ranges, and consistency checks against other data variables within the questionnaire are done by running an editing program. A completeness check program is also run to check if all sample respondents are accounted for. At the Central Office, another round of editing is undertaken. This activity is done to check that the data file is totally clean.

The output tables generated from the clean data files are converted to Excel files to facilitate further data analysis. The estimates generated from the clean MPCSR data are reviewed at the provincial level before submitting to the Central Office. At the Central Office, the estimates are subjected to review and validation.

Response rate
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1. Response rate for Palay Samples = 92.59 %
2. Response rate for Corn Samples = 100 %

摘要
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自1985年起，农业统计局（Bureau of Agricultural Statistics，简称BAS）通过每月的稻谷和玉米情况报告系统（Monthly Palay and Corn Situation Reporting System，简称MPCSRS）对国家内的稻谷和玉米情况进行监测。该活动的主要目的是更新基于现有作物和种植意向生成的预测（通过稻谷和玉米生产调查（Palay and Corn Production Survey，简称PCPS））。基于MPCSRS的研究结果，BAS向农业部长办公室提交备忘录，告知其稻谷和玉米的最新生产状况。

地理覆盖范围
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全国范围

分析单元
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农业经营单位

总体
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MPCSRS涵盖了拥有至少0.100公顷或1000平方米经营面积的稻谷和玉米种植农户。

数据类型
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样本调查数据 [ssd]

抽样程序
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MPCSRS在稻谷生产调查（PPS）/玉米生产调查（CPS）轮次之间每月进行，利用PPS/PCS的一个复制品作为样本，具体如下：

- 对于纯稻谷省份，从PPS样本中选取一个包含十个（10）村庄的复制品。
- 对于纯玉米省份，从CPS样本中选取一个包含十个（10）村庄的复制品。
- 对于重叠（即稻谷和玉米）省份，从PPS样本中选取五个（5）村庄，并从CPS样本中选取另外五个（5）村庄，为该省份提供一个村庄样本。
- 对于次要稻谷或玉米省份，选取一个包含五个（5）村庄的复制品作为样本。
- 对于非玉米省份，选取PPS村庄样本的一个复制品作为MPCSRS的样本。

所选村庄中的所有家庭都被编入名单。目前，MPCSR在全国范围内的样本总量为680个村庄。复制品是根据总稻谷/玉米面积按比例概率选取的。

关于稻谷生产调查（PPS）和玉米生产调查（CPS）抽样程序的详细信息，可在农业统计局电子归档和网络服务（http://beans.bas.gov.ph）查看。

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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在省级操作中心（Provincial Operations Centers，简称POCs）进行人工编码和编辑。在POCs，在电子数据处理过程中，通过运行编辑程序检查基于样本主名单的家庭序列号、基于数据范围的逻辑一致性检查以及与问卷内其他数据变量的逻辑一致性检查。此外，还运行一个完整性检查程序，以检查所有样本受访者是否都已计入。在中央办公室，进行另一轮编辑。该活动旨在确保数据文件完全清洁。

从清洁数据文件生成的输出表被转换为Excel文件，以便利进一步的数据分析。从清洁的MPCSRS数据生成的估计值在省级层面进行审查后，提交至中央办公室。在中央办公室，估计值将接受审查和验证。

应答率
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1. 稻谷样本应答率 = 92.59 %
2. 玉米样本应答率 = 100 %