Fig. 4. The normalized difference vegetation index (NDVI) vs. growth stage (GS)-30 N uptake for five site–years without Hessian fly infestations. Note P-1 was not separated by variety.
Fig. 4. The normalized difference vegetation index (NDVI) vs. growth stage (GS)-30 N uptake for five site–years without Hessian fly infestations. Note P-1 was not separated by variety.