Gong ye jing ji wen zhai/ Nong ye jing ji fa zhan Nong ye jing ji shi Nong ye jing ji ji chu zhi shi/ Gong ye jing ji guan li xue/ Nong ye jing ji xue/ Gong ye jing ji xue/ Nong ye jing ji- jing ji xue Nong ye jing ji- jing ji shi Gong ye jing ji— jing ji shi