Examination of proper measurement point and weight estimation based on measurement value of simplified moisture meter for roll bales
2018
Asaoka, S. (Fukuoka Agriculture and Forestry Research Center, Chikushino, Fukuoka (Japan)) | Yamaguchi, S. | Baba, T.
In 2016, a new simplified moisture meter for roll bales using the time-domain reflectometry (TDR) system was developed by our research group in cooperation with The NARO Kyushu Okinawa Agricultural Research Center. In the present paper we discuss the appropriate measurement point for the new moisture meter by investigating the moisture content, piercing resistance value and TDR. These values were measured at the upper point, middle point and lower point of roll bales of Italian ryegrass silage and rice whole crop silage. The correlation between moisture content and measured TDR value was highest at the middle point; thus, the middle point was judged as most suitable for measurement. We then constructed an equation to estimate roll bale weight using the measured TDR value, and the piercing resistance as an index of roll bale packing density and volume. The equation for Italian ryegrass silage showed high accuracy. This may be because all sample roll bales of Italian ryegrass silage were prepared by same machine and had a similar packing density. Therefore, to improve the proposed equation, a new index of packing density needs to be investigated.
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