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Site-Specific Analysis of a Droughted Corn Crop

I. Growth and Grain Yield

Coastal Plains Soil, Water, and Plant Research Center, USDA-ARS, 2611 West Lucas St., Florence, SC 29501-1242 USA

View larger version (44K): [in a new window]   Fig. 1 Site plan for the 1993 corn study. Locations for eight original sites plus three additional representative sites are indicated, as are transect locations for spatial variation measurements during the season

View larger version (38K): [in a new window]   Fig. 2 Daily air temperature (Ta) extremes, daily solar radiation (Rs), and daily rainfall during 1993. Note the lack of appreciable rain from Day 100 to Day 164, with high temperatures and solar radiation

View larger version (58K): [in a new window]   Fig. 3 Harvest plots overlaid on the soil map for the 1993 corn harvest

View larger version (74K): [in a new window]   Fig. 4 Relative corn yield, computed as harvest plot yield divided by the field mean, kriged and mapped over the sampling area. Numbers show locations of sites