Be sides pro vid ing food, the driv ing force be- hind in creased live stock pro duc tion, live stock have other valu able uses. Live stock re main the most im- por tant if not the sole form of non hu man power avail able to poor farm ers in much of the de vel op ing world. The poor, in par ticu lar, use fer til izer from live stock op era tions, es pe cially when ris ing pe tro- leum prices make chemi cal fer til iz ers un af ford able. Live stock also store value and pro vide in sur.
