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The Effect of Row Spacing, Fertilizer and Planting Rate on the Yield and Water Use of Irrigated Grain Sorghum¹

Synopsis: Irrigated grain sorghum grown in 12- or 20-inch rows produced significantly higher grain yields and produced more grain per inch of water used than in 30- or 40-inch rows. This was attributed to a more uniform spacing of plants which resulted in more efficient use of moisture, nutrients, and solar energy.

² Agronomist, Texas Agricultural Experiment Station, Southwestern Great Plains Field Station, Bushland, Texas, and Agricultural Engineers, Soil and Water ,Conservation Research Division, ARS, USDA, Fort Collins, Colorado, and Bushland, Texas, respectively.