The soybean cultivar Bei 92-28 was tested, m tins experiment and the split plot design was adopted in 2000. The mam treatment was irrigation which had three level presented by A]; A; and A3; the subsidiary treatment was fertilizer application which had three level presented by BI. Rand 63. The influence of coupling effect between water and fertilizer on yield and quality of soybean was studied in mis experiment The object was to provide theoretical evidence and man powered controllable locations for soybean...