ing on-the-farm stora~e. The input coefficients are those related to the production process itself: the quantity of seeds per area. the fertilize..-s and c·hemicals. irrigation water, labouf' (broken do"'n by fat~i fy and hired t·abour required per month or agricu1tur.al season) and the ~o~f<ing capi'tal (tractors and other agrico1tura1 machines). -6 - Jhese oata tnust be coltected acco~ding to the type of cultivation (irrigated or not)• but also. whenever possible. according to type of 1and tenure. size of holding and ownership of agricultural machines. The prices needed are those related to the items listed in the activity section, in addition to the taxes ~nd subsidies paid or received in cash by the farmers. The prices must be corrected by any additional costs such as packing anc.1 transportation costs from or up to the deftverv points. Some items need a specific tr~at~ent: the cost of hi. red 1 abou r 111ay change according to the season; the cost of the work of agricultural machines is different when the machines are hired' from a service COI"pany or Olioined and maintained by the far~HE>r. fhe land rent also Ydri"es according to its nature (irf"ig:lted or notl and the type of land t~=wure (full ownership. sharecroppi.n (J• et.c.·)· The above-mentioned prices are t.hose rec~i.vej or paid by the farffle..-s; they are called "financial p..-ices". In aaditionr the projt:!ct analyst needs another set of prices reflecting the social value of the goods and se..-vices: the "economic prices"• The way economic prices are estimated is not in the scope of this paper. but there are some ba5ic data require1nents for the c:a1culation of these prices. one of thelf'l bein9 the importation or exportation prices. of traded inputs and outputs and the relatea handling and transportation costs from or up to the border. 
**Analysis**
The text appears to be discussing the analysis of a farm's production process, including the input coefficients, prices, and costs. It seems to be focused on the agricultural sector, mentioning specific aspects such as land tenure, irrigation, and agricultural machines. The text also mentions the need for economic prices, which suggests a broader economic context. However, the primary focus is on the farm's production process and its costs, rather than a broader economic or environmental issue.

**Category**
Agriculture, forestry and fishing