Most of the future increase in livestock production is expected to occur in the tropical and subtropical regions of the world. Cattle are the most numerous of the ruminant species in the tropics and provide the largest quantity of animal food products. More than one-third of the world's cattle are found in the tropics. Disease is the major factor which prohibits full utilization of these regions for cattle production. Various infectious and transmissible viral, rick ettsial, bacterial, and particularly protozoan and helminthic diseases, are widespread in the tropics and exert a heavy toll on the existing cattle industry there. This uncontrolled disease situation also discourages investment in cattle industries by private and government sectors. In Africa alone, it is estimated that 125 million head of cattle could be accommodated in the tropical rainbelt if the disease and other animal husbandry factors could be resolved. The potential of efficient cattle production under more favorable conditions prompted various international agencies to establish a multi million dollar International Laboratory for Research in Animal Diseases (lLRAD) in Nairobi, Kenya, Africa. In South America, principal sites for raising cattle are shifting to the savannah lands because the more fertile soils are being used for crop produc tion, however, in the savannahs also, disease remains the most powerful deterrent in implementing the cattle industry.
Popüler yazarlar
Springer (1405) Kolektif (523) Cambridge University Press (50) Marvin Bittinger (47) John Hornsby (44) BrownTrout Publisher (39) Academic Press (38) Margaret Lial (33) NA. VIKRAMAN (33) etc. (32) DK Publishing (31) Judith Beecher (31) Robert Blitzer (31) Charles Darwin (30) Springer; 1 basım (29) teNeues Calendars & Stationery GmbH & Co. KG (27) Wild Pages Press (26) David Ellenbogen (23) DK (21) Michael Sullivan (21)En İyi Yayıncılar
Springer Independently Published CAMBRIDGE UNIVERSITY PRESS John Wiley & Sons Inc Nobel Akademik Yayıncılık; Facsimile. baskı Oxford University Press Nobel Akademik Yayıncılık; 1. baskı Forgotten Books CreateSpace Independent Publishing Platform Türk Tarih Kurumu Yayınları; 1. baskı PRENTICE HALL Springer; 1 basım ACADEMIC PRESS Oxford University Press Inc Türk Tarih Kurumu Yayınları Routledge; 1 basım John Wiley & Sons CRC Press; 1 basım Clarendon Press COLUMBIA UNIVERSITY PRESS