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Plant-to-Plant Variability in Corn Production

^a Oklahoma State Univ., Stillwater, OK
^b USDA-ARS, Lincoln, NE
^c INTA, Parana, Argentina
^d The Ohio State Univ., Columbus, OH
^e Virginia Polytechnic Inst., Blacksburg, VA
^f AAPRESID, Rosario, Argentina
^g Usda-Ars, Ames, Ia

View larger version (21K): [in a new window]   Fig. 1. Average corn grain yield plotted against the standard deviation from by-plant yield over 46 transects in Argentina, Mexico, Iowa, Nebraska, Ohio, Virginia, and Oklahoma.

View larger version (18K): [in a new window]   Fig. 2. Average corn grain yield plotted against the coefficient of variation from by-plant yields over 46 transects in Argentina, Mexico, Iowa, Nebraska, Ohio, Virginia, and Oklahoma.

View larger version (20K): [in a new window]   Fig. 3. Average corn grain yield plotted against the by-plant yield range (maximum minus minimum yield) in 46 transects ranging from 10.5 to 30 m in length in Argentina, Mexico, Iowa, Nebraska, Ohio, Virginia, and Oklahoma.

View larger version (36K): [in a new window]   Fig. 4. Average corn grain yields plotted by plant, every two plants, every three plants, and every four plants, using measured distances between plants at Ames, IA in 2004.

View larger version (40K): [in a new window]   Fig. 5. Average corn grain yields computed using fixed distances of 23.5, 47.0, 70.6, and 94.1 cm at Ames, IA in 2004.

View larger version (17K): [in a new window]   Fig. 6. Normalized Difference Vegetative Index (NDVI) versus corn grain yield determined for every four plants using linear regression and associated 95% confidence intervals, east row at Ames, IA in 2004.

View larger version (16K): [in a new window]   Fig. 7. Effect of averaging plant yields over a specified distance along the row on the absolute error incurred when using the average corn yield for estimating the by-plant yield. Yields were normalized by the average yield along the entire row.