Session 8: Improved Grassland Machanization and Cropping Systems Including a Section Dealing with Improved Research Techniques for Laboratory and Field Evaluation of Forages
Publication Date
1985
Location
Kyoto Japan
Description
A double sampling method to measure herbage mass is described. The relationship between herbage mass and pasture height was shown to be curvilinear with a coefficient of determination of 81 % . It was possible with the double sampling technique using both measurements to increase the precision of estimating dry matter (DM). When taking 3 quadrats and 10 extra height measurements the standard deviation of the mean was reduced by 4.5%. The double sampling technique also decreased the workload of estimating herbage mass. It was therefore possible to maintain the same precision of estimation by reducing the number of quadrats from 6 to 3 provided 5 extra height measurements were also taken. This decrease in the workload of an experiment enabled more plots per treatment to be sampled. The implications of this are discussed in terms of being able to show smaller significant differences in DM production between treatments.
Citation
O'Sullivan, M; O'Keefee, W F.; and Flynn, M J., "The Value of Pasture Height in the Measurement of Dry Matter Yield" (1985). IGC Proceedings (1985-2023). 6.
(URL: https://uknowledge.uky.edu/igc/1985/ses8/6)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
The Value of Pasture Height in the Measurement of Dry Matter Yield
Kyoto Japan
A double sampling method to measure herbage mass is described. The relationship between herbage mass and pasture height was shown to be curvilinear with a coefficient of determination of 81 % . It was possible with the double sampling technique using both measurements to increase the precision of estimating dry matter (DM). When taking 3 quadrats and 10 extra height measurements the standard deviation of the mean was reduced by 4.5%. The double sampling technique also decreased the workload of estimating herbage mass. It was therefore possible to maintain the same precision of estimation by reducing the number of quadrats from 6 to 3 provided 5 extra height measurements were also taken. This decrease in the workload of an experiment enabled more plots per treatment to be sampled. The implications of this are discussed in terms of being able to show smaller significant differences in DM production between treatments.
