• Comparison of Tropical Forages of Known Composition with Samples of These Forages Collected by Esophageal Fistulated Animals

      Marshall, B.; Torell, D. T.; Bredon, R. M. (Society for Range Management, 1967-09-01)
      The effect of saliva on esophageal fistula samples was minimal. Regression equations are presented which compare crude protein and crude fiber contents of esophageal fistula samples with those of forage of known composition. Squeezing esophageal fistula samples, air drying the solid portion, and treating the liquid portion with phenol will preserve samples where laboratory facilities are not available.
    • Measurement of Selective Grazing of Tropical Pastures Using Esophageal Fistulated Steers

      Bredon, R. M.; Torell, D. T.; Marshall, B. (Society for Range Management, 1967-09-01)
      Esophageal fistula samples of tropical forage contained 66.4% more crude protein and 7.7% less crude fiber than the average figure for the clipped pasture forage. The percentage crude protein of herbage leaves was approximately 55% higher and the percentage crude fiber was approximately 17% lower than the whole plant.
    • Variation of Esophageal Fistula Samples Between Animals and Days on Tropical Grasslands

      Torell, D. T.; Bredon, R. M.; Marshall, B. (Society for Range Management, 1967-09-01)
      Forage collected by esophageal-fistulated cattle varies in chemical composition between days and animals. The number of samples needed for a given degree of accuracy was determined. Silica content of fistula steer feces was significantly different from feces from the non-fistulated steer. There were no significant differences in crude protein, crude fiber, and ether extract.