The planner co~es to the conclusion that the coefficient of price aajustment (b) was equal to 0.2 during the period under review. If there is no change in the trends of prices and ferti Jization rate for the next five y~arse the previsions for Tl5 are the follo~ing~ as shown in table 2. Year Arab f e Hanres tea Jand (Millions of hect -ares) Production (Thousands of tons J Yield (T/haJ Fertili zers (kgjha) (Thousands of tons l -------------------------------------- ---------------------- ---------Tl5 1 0.61 683 1.12 66 40 If the pI anners had avai I ab 1 e <l i sagg..-egatea aat.a. they wou I d have noticed that the aggreqated data were covering tilo ch fferent types of fa.-11ers: the cereal fa.-mers following traditional practices and the Modern business-orient ed farmers. fhe disaggregated data for the period TO-Tl are dS follows in table 1. --------------------------------------------------------------- -----Years TO TlO Fa.-m types TRAD MOO TOTAl TRAO MOO TOTAL Total' land (1Rillion ha., 0.8 o.z l o.s 0.5 1 Wheat area ( mi 1 1 ion ha.) 0.40 0.06 0.46 0.25 0.30 a. 55 Production ( ths. tons} 320 72 3'92 200 360 560 ¥ie1d (T/ha} o.a 1.2 0.85 o.a L.Z 1· til Fertilization ( kg/hd) 0 60 8 0 60 33 Total fert11ize.-s {ths.tons) 0 3.6 3.6 0 16 18 --------------------------------------------------- ----------------- 10 -ll - The coefficient of price adjustment is 0 for the tra1ition al farmers ana 0.7 for the ~odern ones. Looking at the disa~yreyateo data. the planner understands that the two populations h~ve very dif­ ferent patterns of economic behaviour. fhe tradional farmers follow the o1d practice of leaving half the land fdllow; they oo not use fer­ tilizers and are not price-responsive. The modern farmeYs are business-oriented; they usP. optinal technologi es and allocate land 
**Analysis**
The text appears to be discussing the agricultural sector, with a focus on the behavior of traditional and modern farmers, the use of fertilizers, and the impact of price adjustments on production. The data presented includes information on land use, production, and fertilizer application, suggesting a strong connection to agriculture. Additionally, the text mentions the concept of price adjustment, which is a key aspect of economics.

**Category**
Agriculture, forestry and fishing