highly significantp < 0.01
The interaction of irrigation and nitrogen and irrigation and year showed a highly significant impact on the summer maize LAI ( p < 0.01) but had an insignificant impact on Chl content and the P n rate ( p > 0.05).
The interaction of irrigation and nitrogen and irrigation and year showed a highly significant impact on the summer maize LAI ( p < 0.01) but had an insignificant impact on Chl content and the P n rate ( p > 0.05).