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Empirical Analysis of Weaning and Pasture Rotation Frequency with Implications for Retained Ownership

^a Dep. of Agricultural Economics and Agribusiness, 217 Agriculture Building, Univ. of Arkansas, Fayetteville, AR, 72701
^b Dep. of Animal Sci., AFLS B106, Univ. of Arkansas, Fayetteville, AR, 72701
^c USDA-ARS, U.S. Dairy Forage Research Center, Univ. of Wisconsin, Marshfield Agricultural Research Station, 8396 Yellowstone Dr., Marshfield, WI 54449
^d 126 Jessie Dunn, Northwestern Oklahoma State Univ., Alva, OK 73717
^e Humphry Environmental, Inc., Fayetteville, AR 72702
^f Univ. of Arkansas Livestock and Forestry Branch Stn., 70 Experiment Station Dr., Batesville, AR 72501
^g North Carolina State Univ. Mountain Research Stn., Waynesville, NC 28786

View larger version (24K): [in this window] [in a new window]   Fig. 1. Comparison of empirical cumulative distribution functions of partial returns per cow at time of weaning for heifers (Panel A = Heifers) and steers (Panel B = Steers) born in 2000 through 2002. Production systems are defined by the number of paddocks and implies rotation frequency (2 is rotating twice monthly and 8 is rotating twice weekly) whereas the letter represents early (E) weaning in April vs. 56 d later (L). The number of observations is presented in parentheses for each production system. PR = partial returns.

View larger version (19K): [in this window] [in a new window]   Fig. 2. Comparison of empirical cumulative distribution functions of partial returns per cow for steer calves born in 2000 through 2002 and sold at time of weaning (Panel A = Weaning) vs. time of feedlot placement (Panel B = Feedlot) and time of finish (Panel C = Finish). Production systems are defined by the number of paddocks and implies rotation frequency (2 is rotating twice monthly and 8 is rotating twice weekly) whereas the letter represents early (E) weaning in April vs. 56 d later (L). The number of observations is presented in parentheses for each production system. PR = partial returns.