(5J Selection of a sample of ZO per cent of the holders in the unit• by systematic random drawing from the categories of la.-ge. IR~diunt and small holdings, successive) Y• (&J Completion of' questionnaire (T-2) on the agricultural holdings of each one of the holders in the sample. (7) CoMpletion of qaestionnaire (T-3) which covers ~eneral information on the villages with data conce~oing local weights and measures and their effective equivalents. In addition, this questionnaire atso c:ontains data on the yields of the \l'arious crrops grown in the unit• on agricultural labour and prices as well as other pieces of information which. on the basis of past expe.-ience, are more conveniently obtained from the vilJage as a whole rather than from individual holder~. So far, agricultural surveys have focussed primarily on the main, basic crops such as grain {So~ghoms. Millet, Maize. ~heat, B.::n-h!y} whereas al f o~her crops noetve bfH~H q,-ouped un1.1er a sinqle heading in the pr·oauction taD1e,. Such ha~ I.H,~e.n the case with ~eqetables. Indeed~ prevtou~ sutvey5 have shown only the area under veqet.abte cn:JOs in gei'lerah ~~~ tnmrt; pro~.ri ding tiny indf­ c:at ion as to the area d11 ot:ted to ~ac.:.h :;.pe<: i fie. ' ,·op.. Fo~ this reason, considering the itnportaoce of vegetdbl~ farming in recent years. and tf1e yearry exp.rm-s 1. on uf the ar?.d under these crops. special su~yeys based on syst~matic random sampling were conducted on this subject in each Gqvernorate~ Mo~eover. the coverage of the ranaom saep leo:i umJet study was increased and now amounts to l5 per cent of atl aqricultu..-aJ holdings under vege­ tables. So far. total area Taiz.., lbb• provide for orchards. fiV1! Governora-tes coaprising 60 per cent of the ander Vf!J>:."table~ hd;c'e tHh?H'' co-.;"2'red n<n:*!"ly !)an.aea..- AI~If'ooeidah and ,U-Beia-a. And programaes for 1985 the adoption of the same appro •. u:h an respect of 
**Analysis**
The text appears to be discussing a survey on agricultural holdings, focusing on vegetable farming and related data such as yields, labor, and prices. It seems to be a study on the agricultural sector, aiming to collect data on a specific aspect of farming, which suggests a strong connection to the field of agriculture. Additionally, the mention of "governorates" and "provinces" implies a regional or local focus, which may indicate a study on a specific geographic area.

**Category**
Agriculture, forestry and fishing