tbl_df method for write_dssbatch()
# S3 method for data.frame
write_dssbatch(x, trtno = 1, rp = 1, sq = 0, op = 0, co = 0, file_name = NULL)
a tibble/data frame or character vector; if a tibble, it should contain all required columns of a DSSAT batch file (FILEX, TRTNO, RP, SQ, OP, CO); if a character vector, it should contain FileX file names
a numeric vector
an optional character vector of the intended batch file name