A New Curve of Critical Nitrogen Concentration Based on Spike Dry Matter for Winter Wheat in Eastern China.

There was a decreasing trend of N c points with increasing SDM of winter wheat; the trend lines could be fitted by the following negative power regression equation: (5) N M 13 : N c = 2.81 × S D M − 0.18 (6) Y M 16 : N c = 2.86 × S D M − 0.16 The two curves showed non-significant differences when compared according to calculation procedures recommended by Mead and Curnow [ 36 ].

also in 47,180 other papers