الفهرس 
استخدام الالات الزراعية فى الزراعة المصريةيوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
Egyptian a g r i c u l t u r e e~tersa rlew age of mechanical technology by the change ir? the source or” power and farm implements. Although t r a d i t i o n a l toals mil ii,lpler,ients are still widely used with nw~an and anha1 power, a s h i f t to mecha~iac1 power a~.dd evelopnerrt,~i n nevi f am riachinary gradually took place in A. 1. . agriculture i n the last two decades, dl pn-pose.. Tractor is now used as a source I. of power for d i f f e r e n t attacheme~ts to do a f a i r l y large part of f i e l d operatiohsi Such attachements include t i l l a g e implements, p l a n t e r s , a~mdc ha~.icalh arlvesting machihe s ; the expamion production and productivity, iifore over, farm nechanizatlo~. has a cost-decreasi~g effect i n the sense t h a t the shilt to tl-actors arzd improved farm machinary makes possible the production of the saix amount of fari:~ output f o r l e s s costs. The main objectives of this study a r e t o : (1) 3utnine the chap-ges i n 2ower aT!d fa rn ~~iachinaruys ed i n A. i<e 3. a g r i - culture during the period 1553-1573. (2) Determine the impact of farn mechap-ization on farm practices output, costs of pro- duction md resource use in - - A. I:, E. agriculturee This s2udy includes three chapters: CrL2pter 1 deals with the use of farm mechinary and the changes i n the s t a t e of farm mechanization t5at took place in 1:. R. C. agriculture during the period 1553-1573. C3apter 1 includes other topics suchas: the density of farm mechanization the countryJ s rsgiom an5 governates-the country’ s needs f roui d i f f e r e n t types of f a r m rnachinary to reach a moderate level of farm nechanization- Public and private expenditures on farm mechanization pograms . Chapter 2 outlines the primary e f f e c t s of mechanizat i o n on farm practices and output, and its inpact on costs of production of f i e l d crops. Evaluation of econornic impact of farm mechanization i-. this chapter is confined t o and based or! the r e s u l t s drown from s e v e r a l f i e l d studi~s2 nd experiments c a r r i e d out i~t h.e p a s t f o r t h a t purposee Cha~iter 3 deales prinvrily with the ~stimation of short-run cost functions f o r thrcc ficld crops namely,~v”,tat barcly and horse’seans , grown i n the f u l l y mchanized farm iri the mst :lobaria iiegion an& in the partiall i.icchanizta farms located a t the liortliern Etegion of T&reer Province. Results of cost analysis Tor thc three iicld crops i n We two t?ipes of farms provide an evidence f o r thc impact of mechanization on costs and supplies of fielu crops, The data used i n the estimation of cost functions ars drawn from farm records i n the two regions for two years 197% and 1575# Several algebraic equation forms are used i n derving the cost functions, and most efficient ones were selected t o express and pr edi c t the r e l a t ionships bctw~~cons t s and output per feddan of each of the three f i e l d crops under the twcl levels of farm mechanization, For cach of the threc f i e l d I crops the optimum and inaxinum p r o f i t levels of output in both types of farms are estimateds In addition the shortrun suppl:J functions are derived for each of the three crops in both types of farms.