text: The area frame must be used to conduct an annual study of acreages. yields and livestock and. thereDy. ultimately contrib­ ute to the agricultural census. (6J Efforts to conduct the agricultural census. either with the traditional frame, i.e. the lists of villages. or with the area frame. i.e. areal ~~taps. The complete fulfilment of all above mentioned tasks calls for considerable human and material resources. VI-PROJECTIONS UNTIL THE YEAR 2000 The proposed pi' an wil 1 no doubt satisfy minimum require­ ments in basic agricultural data. Yet, the compilation of sta­ tistics involves continuous and evolutive work. for this reason, in the years following the plan, efforts will have to concetrtr-at.e on r-efining and supplementin<J d·ata cot lected in p..-e­ vious year-s and updating data which no longer reflects existing conditions. In adai t ion. another census wi 11 have to be con­ ducted ten years after the c011pletion of the first and fresh research work• likely to improve the accuracy of national accounts in the ag..-icu1t.ural sector• must be undertaken. Ope•at.iDns to be carried out in this connection c<1n be sub­ sumed as follows: (lJ The annual study of acreages and yields must be contin­ ued and met.hGdotogic.at improvements must t.e intr-oduced each year to keep pace with developments in data collection techniques. (2) New data must be introduced into th~ yea1ly study of acr-eage~ ana yi "'' ds. t;(~ sat.i sf=y the rrequ i n:::menu. or r.: L:l1mer s and researchers. {3,1 A second national agricultural census must be Olnducted 10 year~ after the c0111pletion of the first census w~2•e uporr a co.r~parative study of both census must be undertaker, ;:,r-.c' guide­ lines for future uevelopment in the agriculturat sector must be f aid dOo•fnw (4) The publication of periodic statistical h~l~etins mu~t be rontinu~d with yearly imp•ovements. 
analysis: The text appears to be discussing a plan for conducting agricultural studies, including an annual study of acreages and yields, and the importance of refining and updating data to improve the accuracy of national accounts in the agricultural sector. It also mentions the need for a second national agricultural census 10 years after the first one. This suggests that the text is focused on the agricultural sector, and the collection and analysis of data related to it.