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Agronomic Potential of Narrow-Leafed and White Lupins in the Inland Pacific Northwest

^a Texas Agric. Exp. Stn., 2301 Experiment Station Rd, Bushland, TX 79012
^b Montana State Univ., Cent. Agric. Res. Cent., HC 90 Box 20, Moccasin, MT 59462
^c Oregon State Univ., Columbia Basin Agric. Res. Cent., P.O. Box 370, Pendleton, OR 97801

View larger version (31K): [in a new window]   Fig. 1. Effects of sowing date (day of year), cultivar, and seeding rate on narrow-leafed lupin yield at three sites in eastern Oregon (Exp. 2). At the Helix site, date of sowing and sowing rate had significant (p < 0.01) effects on yield; at the Condon site, date of sowing and variety had significant effects. At the Lexington site, where only the first sowing date was harvested, both sowing rate and cultivar had significant effects. Bars represent ±1 SE and are calculated for individual sites because of the different number of harvests at each site.

View larger version (14K): [in a new window]   Fig. 2. Yield and protein content of narrow-leafed lupin as a function of planting date near Pendleton, OR, in the year 2000. Lupin was planted on 21 March [day of year (DOY) 80], 31 March (DOY 90), and 17 April (DOY 117). Bars represent ±1 SE.

View larger version (24K): [in a new window]   Fig. 3. Stored water in the upper 1-m soil profile as a function of day of year (DOY) in the year 2000 for narrow-leafed lupin planted on 21 March (DOY 80), 31 March (DOY 90), and 17 April (DOY 117) near Pendleton, OR. Closed symbols are for the cultivar Merrit; open symbols are for the cultivar Kalya. Bars represent ±1 SE.

View larger version (27K): [in a new window]   Fig. 4. Profile water distribution on the day of planting in the year 2000 for narrow-leafed lupin planted on 21 March (DOY 81), 31 March (DOY 91), and 17 April (DOY 118) near Pendleton, OR. Bars represent ±1 SE.

View larger version (24K): [in a new window]   Fig. 5. Water use efficiency (WUE) [grain yield/(crop transpiration + evaporation from soil surface] as a function of yield for narrow-leafed lupin. The diamond symbols are from the 1998 Exp. 1, conducted at Moro and Pendleton. All other symbols are from the 2000 Exp. 3. Circles are for the 21 March planting date, squares for the 31 March planting date, and triangles for the 17 April seeding date. CH, DA, ME, YO, and KA represent the cultivars Chittick, Danja, Merrit, Yorrel, and Kalya, respectively.