4. Conclusion
In conclusion, results from this study indicate that there is
variation in plant growth responses among ten forage grasses to
either various rainfall rates, soil types, or both. In general, most of
species significantly increased basal diameter and height as rainfall
increased. Soil texture also significantly effect on plant height for
some of Great Plains prairie grasses. In both measured volume and
simulated yield, large increases were observed between 350 mm/yr
and 850 mm/yr for all species, while a relative small increases were
observed at 1331 mm/yr. Simulated yields when simulating either
each species separately or all species growing together relatively
agree well with measurement in comparison between medium and
high rainfall treatment. But, in comparison between low and medium rainfall treatments, simulated yields with all species growing
together gave better agreement with measurements.