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    Home / Central Data Catalog / AGRIC / NGA-NBS-AGREXP-2003-V1.0
AGRIC

National Survey of Agricultural Export Commodities 2003
First Round

Nigeria, 2003 - 2005
Reference ID
NGA-NBS-AGREXP-2003-v1.0
Producer(s)
National Bureau of Statitics (NBS)
Collections
AGRICULTURE AND FOOD SECURITY
Metadata
Documentation in PDF DDI/XML JSON
Created on
Oct 18, 2010
Last modified
Dec 02, 2013
Page views
168812
Downloads
2474
  • Study Description
  • Data Dictionary
  • Get Microdata
  • Identification
  • Version
  • Scope
  • Coverage
  • Producers and sponsors
  • Sampling
  • Survey instrument
  • Data collection
  • Data processing
  • Data appraisal
  • Distributor information
  • Data Access
  • Disclaimer and copyrights
  • Contacts
  • Metadata production
  • Identification

    Survey ID number

    NGA-NBS-AGREXP-2003-v1.0

    Title

    National Survey of Agricultural Export Commodities 2003

    Subtitle

    First Round

    Abbreviation or Acronym

    AGREXP-2003

    Translated Title

    No translation

    Country
    Name Country code
    Nigeria NGA
    Study type

    Agricultural Survey [ag/oth]

    Series Information

    The National Survey of Agricultural Export Commodities is a joint project of four federal agencies namely: National Bureau of Statistics (NBS), Central Bank of Nigeria (CBN), Federal Ministry of Agriculture and Rural Development (FMA&RD) and Federal Ministry of Commerce (FMC).

    Funding for the project was initially to be undertaken by the four collaborating agencies in the following proportions: CBN 50%, FMA&RD 20%, FMC 20%, and NBS 10%. After consideration of the financial limitations of the other three agencies, the Federal Executive Council directed the CBN to fund the project until such a time when other collaborating agencies would be financially strong enough to contribute their own quotas.

    The project took off with the pilot survey of 2002, the publication of which was released in September 2006.

    Abstract

    Agricultural Export Commodity is defined as an exportable crop grown in Nigeria and is curently or has a currently or has a great potential of generating foreign exchange for the nation. The crops under consideration are rubber , coffee, cocoa, sesame seed, garlic, tea, ginger, gum arabic, cashew nut, oil palm, groundnut, cotton, sugarcane and sheanut

    Nigeria is earning some foreign exhange from the fourteen export crops covered in the survey

    The objective of the survey is to provide a national baseline data on agricultural comodities. Further more, the annual survey, among others will help to:-

        1. Provide structural data on agricultural export commodities in Nigeria
        2. Obtain socio-economic data and demographic characteristics of holders within households; and
        3. Provide production estimates at national and state levels.
    Kind of Data

    Sample survey data [ssd]

    Unit of Analysis

    Household

    Version

    Version Description

    Version 1.0

    Version Date

    2009-02-27

    Version Notes

    General Review of the Metadata

    Scope

    Notes

    Area of Focus for data collection were on:

    • Household characteristics
    • Area of production
    • Employment characteristics
    • Farming implements
    • Agronomic practices
    Topics
    Topic Vocabulary URI
    rural economics [1.6] CESSDA http://www.nesstar.org/rdf/common
    agricultural, forestry and rural industry [2.1] CESSDA http://www.nesstar.org/rdf/common
    employment [3.1] CESSDA http://www.nesstar.org/rdf/common
    basic skills education [6.1] CESSDA http://www.nesstar.org/rdf/common
    gender and gender roles [12.6] CESSDA http://www.nesstar.org/rdf/common

    Coverage

    Geographic Coverage

    National State Sector (Urban/Rural)

    Universe

    Household export crop farmers Modern Agricultural export crop Holders

    Producers and sponsors

    Primary investigators
    Name Affiliation
    National Bureau of Statitics (NBS) Federal Government of Nigeria (FGN)
    Producers
    Name Affiliation Role
    Central Bank of Nigeria Federal Government of Nigeria (FGN) Collaboration
    Federal Ministry of Agriculture and Rural Development Federal Government of Nigeria (FGN) Collaboration
    Federal Ministry of Commerce Federal Government of Nigeria (FGN) Collaboration
    Funding Agency/Sponsor
    Name Abbreviation Role
    National Bureau of Statitics NBS Technical Support
    Central Bank of Nigeria CBN Funding
    Other Identifications/Acknowledgments
    Name Affiliation Role
    Ministries, Depaartments & Agencies MDAs Technical Support

    Sampling

    Sampling Procedure

    The design employed a two-phase and a two-stage sample selection procedure

    Phase 1, stage 1: The comprised listing exercise and administering of holding questionnaires. A total of 192 Local Government Areas (LGAs) were selected throughout the Federation and ten (10) Enumeration Areas (EAs) were selected in each LGA, totalling 1,920 EAs throughout the country including the Federal Capital Territory. Most of these LGAs were selected based on the information that they were producing one or more of the selected export crops. Not less than three LGAs were selected from each State of the Federation and FCT.

    Phase 1, stage 2: In this stage, ten (10) export crop farming housing units were selected in each EA using systematic selection approach and all the households in each export crop farming housing unit were covered in the administration of holding questionnaires.

    Phase 2, stage 1: This phase dealt with the crop cutting exercise which comprised farm survey, laying of yeild plot and harvesting. All the ten export crop farming EAs in the LGAs covered in the first phase were selected for crop cutting exercise.

    Deviations from the Sample Design

    No Deviation

    Response Rate

    On a national basis the 2003 survey achieved a response rate of about 74.86% at Housing Unit level.
    Reasons for non-response was not given.

    Weighting

    The formula adopted in calculating the design weights for the survey data (sample results) were as follows:

    (i) The probability of selecting an EA within a state was obtained by dividing the total number of EAs sampled in a
    state by total number of EAs in that particular state. Let this be represented by fj. That is,
    fj = (Total Number of EAs sampled in a state)/(Total Number of EAs in that particular State)

    (ii) Likewise, the probability of selecting an housing unit (HU) within an EA was obtained by dividing the total number
    of housing units selected in an EA by the total number of housing units (HUs) listed in that particular EA. Let this be
    represented by fk. That is,
    fk = (Total Number of HUs selected in an EA)/(Total Number of HUs listed in that particular EA)

    Then the product (fj) x (fk) represented by f is the sampling fraction for each of the corresponding study unit (Enumeration Area) for all the 1,920EAs canvassed throughout the 36 states of the Federation and FCT, Abuja. The inverse of the sampling fraction is known as the design weight and was applied accordingly to all the study units.

    Mathematically,
    Design weight = ((Total number of EAs in a state)/(Total number of EAs sampled in that particular state)) X ((Total Number of HUs listed in an EA)/(Total Number of HUs selected in that particular EA))

    The above value was obtained for each of the 1,920 EAs canvassed throughout the 36 states of the Federation and FCT, Abuja.
    The weight (Rf) was calculated and attached to the data

    NOTE:
    Adjustment was made to the weight depending on the reponse at household level

    Survey instrument

    Questionnaires

    FEDERAL REPUBLIC OF NIGERIA
    NATIONAL SURVEY ON AGRICULTURAL EXPORT COMMODITIES CONDUCTED BY CENTRAL BANK OF NIGERIA IN COLLABORATION WITH
    THE FEDERAL OFFICE OF STATISTICS,FEDERAL MINISTRY OF AGRICULTURE AND RURAL DEVELOPMENT AND FEDERAL MINISTRY OF COMMERCE

    HOLDING QUESTIONNAIRE
    SECTION I: HOLDING IDENTIFICATION
    SECTION II: ACESS TO LAND
    SECTION III: SOURCE OF FUNDS
    SECTION IV: EXPORT CROP FARMING
    SECTION VII: MARKET CHANNEL
    SECTION VIII: QUANTITY SOLD
    SECTION X: QUANTITY CONSUMED
    SECTION XI: USE OF FERTILIZER
    SECTION XII:
    SECTION XIII: USE OF IMPROVED SEEDLING/SEED

    Methodology notes

    (a) The data entry was done manually
    (b) The data entry was done in lagos at (csd) cencus and surey division
    (c) Six operator plus two suppervissor and two progammer were used
    (d) Six machines were used for data entry
    (e) The data entry staff used 20 days to do the entries
    (f) The supervisor use 5 days to checked the entries
    (g) progarm was written to convert the data to spss also provided as external resource

    Data collection

    Dates of Data Collection
    Start End Cycle
    2003-08-05 2005-08-15 10 days
    Time Method

    2004/2005

    Time periods
    Start date End date Cycle
    2003-08-05 2005-08-15 10 days
    Mode of data collection
    • Face-to-face [f2f]
    Data Collectors
    Name Affiliation Abbreviation
    Field services and methodology department, National Bureau of Statistics (NBS) FSM
    Supervision

    Field services and methodology department,

    Data Collection Notes

    DATA COLLECTION STRATEGY
    The FOS permanent field staff residing in the Enumeration Areas carried out the data collection during the survey. In the household component of the survey, each household head or a responsible adult in the household gave information
    about his household in general. The field staff consisted of Enumerators, Interviewers and Supervisors while the
    field coordination team comprised the State Officers and Zonal Controllers. Each State Officer coordinated all field operations while each Zonal ContRoller supervised and coordinated the States in his zone.

    TRAINING
    Three levels of training were conducted for the survey. Training of the Trainers (TOT) was conducted for the members of the Technical Sub-committee. Twenty trainersttrainees who were trained at the first level training later handled the second level training held in the six geo-political zones of the country. During the second level training, 117 participants comprising Zonal Controllers, State Officers and field officers of the Federal Office of Statistics were trained. The third level training took place in each of the 36 States' capital and FCT where a total of 1,067 Enumerators and Supervisors of the Federal Office of Statistics were trained.

    FIELD ORGANISATION
    Listing exercise commenced on Monday, 251h November, 2002 and lasted two weeks. Thereafter, ten export farming housing units (EFHUs) were selected for coverage. The Enumerators and field officers of the Federal Office of Statistics administered the copies of the holding questionnaire to all qualified agricultural export commodity farmers in each of the selected Enumeration Areas in all the States of the Federation and the Federal Capital Territory, from 27'h January 71h February, 2003. Through this exercise, relevant information on production, processing, marketing and credit were obtained from the farmers. The crop cutting exercise covered three broad activities namely: the survey of farm plots, laying of yield plots, and harvesting of crops on designated plots. This

    Data processing

    Data Editing

    The completed questionnaires were collated and edited manually
    (a) Office editing and coding were done by the editor using visul contro of the questionnaire before data entry
    (b) Imps was used to design the data entry template provided as external resource
    (c) six operator plus two suppervissor and two progammer were used
    (d) six machines were used for data entry
    (e) After data entry data entry supervisor runs fequency on each section to see that all the questionnaire were enterd
    (f) Conversion progarm was written to convert the data to spss also provided as external resource

    Data appraisal

    Estimates of Sampling Error

    No sampling error estimate

    Data Appraisal

    In order to ensure high quality data, two phased quality check exercises were put in place. During the first exercise, the officers skim-checked ten listing forms and ten selected holding questionnaires in the selected EAs in each State and FCT.
    The second phased was spot-checked ten listing forms and ten selected holding questionnaires in the selected EAs in each State and FCT.
    Farmers were randomly selected and visited on their farms to authenticate the data entries made by enumerators.

    Distributor information

    Distributor
    Organization name Abbreviation Affiliation
    Central Bank of Nigeria CBN FEDRAL GOVERNMENT OF NIGERIA
    Federal Ministry of Agriculture and Rural Development FMA&RD FEDRAL GOVERNMENT OF NIGERIA
    Federal Ministry of Commerce FMC FEDRAL GOVERNMENT OF NIGERIA

    Data Access

    Access authority
    Name Affiliation URL Email
    National Bureau of Statistics (NBS) Federal Government of Nigeria (FGN) http://www.nigerianstat.gov.ng feedback@nigerianstat.gov.ng
    Confidentiality
    Is signing of a confidentiality declaration required? Confidentiality declaration text
    yes The confidentiality of the individual respondent is protected by law (Statistical Act 2007) This is published in the Official Gazette of the Federal republic of Nigeria No. 60 vol. 94 of 11th June 2007. See section 26 para.2. Punitive measures for breeches of confidentiality are outlined in section 28 of the same Act.
    Access conditions

    A comprehensive data access policy is been developed by NBS, however section 27 of the Statistical Act 2007outlines the data access obligation of data producers which includes the realease of properly anonymized micro data.

    Citation requirements

    National Bureau of Statistics, Nigeria, National Survey of Agricultural Export Commodities 2003-v1.0

    Disclaimer and copyrights

    Disclaimer

    The user of the data acknowledges that the original collector of the data, the authorized distributor of the data, and the relevant funding agency bear no responsibility for use of the data or for interpretations or inferences based upon such uses.

    Copyright

    (c) NBS 2007

    Contacts

    Contacts
    Name Affiliation Email URL
    Dr V.O. Akinyosoye Director General voakinyosoye@nigerianstat.gov.ng http://www.nigerianstat.gov.ng
    DR G.O. Adewoye Director Census & Surveys georgeadewoye@yahoo.com http://www.nigerianstat.gov.ng
    Mrs A.N. Adewimbi Head of Information and Comnucation Technology Department anadewimbi@yahoo.com http://www.nigerianstat.gov.ng
    Biyi Fafunmi Data Access biyifafunmi@nigerianstat.gov.ng http://www.nigerianstat.gov.ng
    Mrs A. A. Akinsanya Data Archivist paakinsanya@nigerianstat.gov.ng http://www.nigerianstat.gov.ng
    Mr R.F. Busari ICT rfbusari@nigerianstat.gov.ng http://www.nigerianstat.gov.ng
    National Bureau of Statistics (NBS) Fedral Government of Nigeria (FGN) feedback@nigerianstat.gov.ng http://www.nigerianstat.gov.ng

    Metadata production

    DDI Document ID

    DDI-NGA-NBS-AGREXP-2003-v1.0

    Producers
    Name Abbreviation Affiliation Role
    National Bureau of Statitics NBS Federal Government of Nigeria (FGN) Metadata Producer
    Date of Metadata Production

    2009-02-27

    Metadata version

    DDI Document version

    Version 1.0

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