Fig. 3. Relationship between subsurface tile drainage and (a) annual flow-weighted nitrate N concentration and (b) annual nitrate N loss in tile drainage water from continuous corn that received 200 kg N/ha each spring at Waseca, MN
Fig. 3. Relationship between subsurface tile drainage and (a) annual flow-weighted nitrate N concentration and (b) annual nitrate N loss in tile drainage water from continuous corn that received 200 kg N/ha each spring at Waseca, MN