University;
of;
Kentucky,;
Department;
of;
Plant;
&;
Soil;
Sciences,;
Research;
and;
Education;
Center,;
Princeton,;
KY;
42445,;
USA.;
University;
of;
Kentucky,;
Department;
of;
Plant;
&;
Soil;
Sciences,;
Lexington,;
KY;
40546,;
USA.;
不详;