National Survey of Agricultural Export Commodities 2007 - Nigeria

Abstract
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This edition is the fourth in the series of survey project conducted .

The survey covered the following sixteen crops: Cashew, Cassava, Cocoa, Coffee, Cotton, Garlic, Ginger, Groundnut, Gum Arabic, Kolanut, Oil Palm Rubber, Sesame seed, Sheanut, Sugar cane and Tea. This means additional two crops were introduced to the survey.

The major objectives of the survey include:

i. To ascertain the spread of the cultivation of each of the sixteen export crops within Nigeria in terms of area cultivated by State.
ii. To provide a national basic data series on agricultural export commodities.
iii. To provide structural data on agricultural export commodities in Nigeria.
iv. To obtain socio-economic data and demographic characteristics of holders within households.
v. To provide production estimates at national and state levels.

Geographic coverage
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National Coverage

Analysis unit
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Households

Universe
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Household export crop holder

Kind of data
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Sample survey data [ssd]

Sampling procedure
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192 LGAs were selected nationwide.

A 2-stage sample design was employed. In the first stage,10 EAs were systematically selected from each sampled LGA. Of the expected 1,920 EAs, only 1,855 were found to have export crops and were eventually studied.

In the second stage,10 export crop farming housing units were systematically selected from each sampled EA (provided there were more than 10 farming housing units in the EA). Where there were 10 or less farming housing units, no selection was required and all available housing units were studied.

Out of the 18,550 export crop farming housing units expected to be covered, 15,583 were canvassed.

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

Cleaning operations
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The completed questionnaires were collated and edited manually before data entry operation was carried out by the NBS staff in the six designated NBS zonal headquarters. Machine data editing, table generation and analysis were carried out by NBS staff at NBS headquarters, Abuja, followed by report writing by the Consultative Committee on Agricultural Export Commodity Statistics (CCAECS).

Response rate
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On national basis, 100 percent response rate was acheived at LGA level; 96.61 percent at EA level while 84.00 percent was acheived at export crop farming housing units level. Reasons for non-response was not given.

摘要
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本版是本系列调查项目的第四期。
调查涵盖了以下十六种作物：腰果、木薯、可可、咖啡、棉花、大蒜、姜、花生、阿拉伯树胶、可乐果、油棕橡胶、芝麻、椰子、甘蔗和茶叶。这意味着有另外两种作物被纳入调查。
调查的主要目标包括：
i. 确定十六种出口作物在尼日利亚各州的种植面积分布情况。
ii. 提供关于农业出口商品的国家基本数据系列。
iii. 提供尼日利亚农业出口商品的结构数据。
iv. 获取家庭持有者的社会经济数据和人口统计学特征。
v. 提供国家和州级的产量估计。
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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家庭出口作物持有者
数据类型
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样本调查数据 [ssd]
抽样程序
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在全国范围内选择了192个地方政府区域（LGAs）。
采用了两阶段样本设计。在第一阶段，从每个抽样LGA中系统地选择了10个选举区（EAs）。在预期的1,920个EAs中，发现只有1,855个拥有出口作物，并最终被研究。在第二阶段，从每个抽样EAs中系统地选择了10个出口作物种植住房单位（如果EAs中有超过10个种植住房单位）。如果有10个或更少的种植住房单位，则不需要选择，并研究所有可用的住房单位。在预期的18,550个出口作物种植住房单位中，有15,583个被调查。
数据收集方式
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面对面纸质调查 [f2f]
数据清理操作
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完成后的问卷被收集和人工编辑，然后由NBS工作人员在六个指定的NBS区域总部进行数据录入操作。机器数据编辑、表格生成和分析由NBS工作人员在阿布贾的NBS总部进行，随后由农业出口商品统计咨询委员会（CCAECS）编写报告。
响应率
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在全国范围内，地方政府区域级别的响应率为100%；选举区级别的响应率为96.61%；出口作物种植住房单位级别的响应率为84.00%。未提供未响应的原因。