SPAD values versus N rate sufficiency

SPAD values versus N rate sufficiency

Figure 1. Relationship between Minolta® 502 SPAD chlorophyll meter relative values (reading divided by N sufficient reference strip reading) and N rate deviation from the economic optimum N at 51 sites where corn followed soybean in Iowa (1999­2003).

Updated 06/02/2005 - 4:44pm