Concepedia

C. J. Callahan

CJ

27

Publications

1.2K

Citations

19

H-Index

1967

Active since

Affiliations

Purdue University West Lafayette(Current)

University of Southern California

University of Michigan

C. J. Callahan is an author at Purdue University West Lafayette specializing in public health, fertility, and animal science.

Top concepts

Publications per year

1967–2020

27

Publications

27

Profiles of reproductive hormones associated with fertile and nonfertile inseminations of dairy cows

R.E. Erb, H.A. Garverick, R.D. Randel et al. · Theriogenology · 1976 · 138 citations

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Effect of Forage-Concentrate Ratio in Complete Feeds Fed ad Libitum on Feed Intake Prepartum and the Occurrence of Abomasal Displacement in Dairy Cows

C.E. Coppock, C. H. Noller, Shirley Wolfe et al. · Journal of Dairy Science · 1972 · 122 citations · Full text

Sexual Activity of Holstein Cows: Seasonal Effects

J.A. Pennington, J.L. Albright, M. A. Diekman et al. · Journal of Dairy Science · 1985 · 77 citations · Full text

Effects of Ovariectomy during Pregnancy and of Prematurely Induced Parturition on Progesterone, Estrogens, and Calving Traits

Boon P. Chew, R.E. Erb, J. F. Fessler et al. · Journal of Dairy Science · 1979 · 70 citations · Full text

Relationships of Sexual Activities in Estrous Cows to Different Frequencies of Observation and Pedometer Measurements

J.A. Pennington, J.L. Albright, C. J. Callahan · Journal of Dairy Science · 1986 · 65 citations · Full text

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