Key points are not available for this paper at this time.
Laura Paine, D. J. Undersander, David W. Sample, Gerald A. Bartelt, Tracy A. Schatteman, Cattle Trampling of Simulated Ground Nests in Rotationally Grazed Pastures, Journal of Range Management, Vol. 49, No. 4 (Jul., 1996), pp. 294-300
Paine et al. (Mon,) studied this question.