Arkansas soybean growers are fortunate to have many soybean varieties from
which to select. Currently over 75 determinate (maturity groups V, VI) and over
35 indeterminate (Group IV Maturity) varieties are considered to be adapted to
Arkansas growing conditions by the University of Arkansas Cooperative Extension
Service. Variety selection should consider yield potential and avoidance of
environmental, cultural and disease problems.
The number of cultural and disease problems that can occur in practice
exceeds 100,000 possible combinations. This computer program, SOYVA, has been
developed to select those varieties which avoid a particular set of problems
associated with a given field. SOYVA makes giving specific field recommendations
easier. Factors affecting variety selection in this program include geographic
location, soil texture, planting dates,
soybean cyst and root knot nematode problems, varietal sensitivity to the
herbicide propanil, lodging, soil chloride, and irrigation.
SOYVA also considers varietal resistance to frogeye leafspot, stem canker and
Sudden Death Syndrome (S.D.S). SOYVA will select varieties from the adapted list
and present field specific variety recommendations sorted into highly
recommended, recommended, and non-recommended categories.