text: basic foods. The recorci surplus of 1. 5 milli ~·n tonnes of durra ar1c 0.5 nillicr tcr:nes of qrour.d-nuts in 1'81 is an enviable achievement by any star:uar<is. Another major ;,chievement in the Sucian in 1981/87 v1as the conpletion of th•! Rahad irriqated pr0ject, which adoed s C'!'ne 125, 000 hectares to t. 1e total irriqa ted farm area an(! earned $85 million of foreiqn exc·,anqe. (b) Eastern anr1 Ecutl.E=rn Africa 10. In this subreqion cereal pra'iucticn inc ·ease(] by 5.4 per cer.t in 1981. The qrewth rate ";as particularly marked in respect cf r.1a ize, but vas pi:l rtl y cffset by the sl CV.'·?r qrO\·Jth rates i r. r.iillet ar:d ·vd1eat anu neqative qrO\Jth rates in barley and rice. Non-cereal f ocd prcducts -roots and tubers, pulses, veqetable oils ar:d livestcch -siqnificantly contributed to the increase. 11. In Zambia, tor ir>stnnce, the value of marketed aaricultural output increased by 9.8 per cent in renl terms in 1981 compared \:iti1 an increase of 3·.4 per cent in lSBO ar.d a decrease of 11.8 per cent in 1979. The most ir.tpressive cchiever.ter:t in crop prociucti on v.ras reccrcJeci by rna ize, output of \. hich increased f rem 3!32,SDC tcnnes in 1980 to 704,770 tor:neE in 1981. Naize elivt-.lies tc NJ..l'ii.:O."-.RD ard the co-operative utior~, which anourt­ ed tu 4.2 ITiillior baqs ir 1980, rose tc 7.8 millior, baqs ir 1981. 'TlH::'re were alsc ircreases in qrourd-r:ut, sunflower, seed cotter•, wheat anJ rice prcducticr il" 1981. The upward adjustmert i1 producer prices was the mair: contributory factor. 1_2. lr. Kenya, qcod .,,eather acccmpar:ied l:y ir.creasec producer prices prrn~ptell a strcnc. recovery i r. output. Recorded narketec~ cutput rose by 9.5 per cent at current prices in 1981. Produc­ tion of Jttajor food crops, especially r::aize, recovere0 apprecial:'ly from the la; level of 1980. The maize crcp rose by 28 per cer,t 
analysis: The text appears to be discussing agricultural production, irrigation projects, and market trends in several African countries, specifically Sudan, Eastern and Southern Africa, and Zambia. The focus is on the quantity and value of crops produced, as well as the factors affecting their production and market prices. This suggests that the category should be related to agriculture, economy, and development.