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Spatial and Temporal Variability of Corn Growth and Grain Yield

Implications for Site-Specific Farming

Oregon State Univ., Columbia Basin Agricultural Research Center, P.O. Box 370, Pendleton, OR 97801

View larger version (28K): [in a new window]   Fig. 1. Experimental sites at Halfway, TX, showing DGPS locations, water, and hybrid treatments for (a) 1998 and (b) 1999.

View larger version (58K): [in a new window]   Fig. 2. Grain yield clusters in (a) 1998 and (b) in 1999 at Halfway, TX.

View larger version (60K): [in a new window]   Fig. 3. Corn grain yield clusters and total plant dry matter (TDM) accumulation in each cluster in 1998 and 1999. The bars represent standard errors for each cluster.

View larger version (64K): [in a new window]   Fig. 4. Leaf dry matter (LDM), stem dry matter (SDM), and ear dry matter (EDM) accumulation in corn in each cluster in 1998 and 1999. The bars represent standard errors for each cluster.

View larger version (60K): [in a new window]   Fig. 5. Crop growth rate (CGR), net assimilation rate (NAR), and leaf area index (LAI) of corn grain yield clusters in 1998 and 1999. The bars represent standard errors for each cluster.

View larger version (85K): [in a new window]   Fig. 6. Leaf number and plant height of corn in each grain yield cluster in 1998 and 1999. The bars represent standard errors for each cluster.