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By Symposium on Advances in Food-Producing Systems for Arid and Semiarid, Jamal T. Manassah, Ernest J. Briskey

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Th e w ere new i n i t i a l c o u n trie s and d is p e lle d e m p h a siz e d s p e c if ic a lly r ic e th a t d e v e lo p in g th e A ll holdings (percent) ra te o f c e r ta in ly B u t one n o tio n r e s is t a n t to the e s s e n t ia lit y the d e v e lo p in g i l l i t e ­ v a r ie t ie s r iv a ls th in g th a t i s s m a ll change. o f re se a rc h c o u n trie s. and 19 FOOD AND RESOURCE NEEDS OF THE WORLD T h at t h is and In re se a rc h c o n c o m ita n t N o rth w e st ad o p te d and p re ssu re s, and In d ia the be h ig h use o f s p e c ific the v a r ie t ie s ra te s s o la r o f lo c a tio n ra te s new p ro d u c tio n and en co u rage d g ra in m ust a d o p tio n new and resp on d ed r a d ia tio n f e r t iliz e r is a s s o c ia te d o th e r id e a l by in th e tw o c o m p a ra tiv e are as p ro d u c tio n a c c o rd in g ly .

M e c h a n ic a l s o c ia l advan tage c h e m ic a l as th e in p u ts are fo r are fo r is la b o r fo rc e d now and pow er i t s n ot a is w as I in w a te r so m e o f t h e ir n a t io n s , The se c tio n s a c c u m u la te d in th e n a tio n a l a b ilit y o f the d u rin g o f co u n try th e e x te n t and to T erhune w h ic h stim u la te p h o to ­ m a rk e tin g o f pow er so u rce o f A fr ic a , th e w h ic h en ergy and prod u ce d m ore o f th e A m e ric a . advanced in c re a se s S te in h a r t and c o u n trie s 1 9 7 8 ).

S t a tio n s th e re se a rc h to the M e x ic o , t h e ir re p re se n ta tiv e r a in fe d in have by a re as are lo w gave e n v iro n m e n ts. fo r o f s u c c e s s fu lly so m ew h at p ro d u c tio n m ade e x p e rim e n t th e The re s is ta n c e e n v iro n m e n ts c o m m o n ly under v a r ie t ie s fo o d cro p s in the fo o d e s p e c ia lly d ic ta te d s t a tio n s s t a tio n s v a lu e in w h e ats e n v iro n m e n ts. lo n g e r re p re se n t fo r on p e st are and b io lo g ic a l no in e c o n o m ic m ost new c o n tro l.

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