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Influence of Post Harvest Residue Management and Fertilization on Crop Yield¹

Yields of forage sorghum (Sorghum bicolor (L.) Moench.) were significantly different when grown under two management systems over a 5-year period. Allowing regrowth to occur until October 15 resulted in first harvest forage sorghum yields in the succeeding season of approximately 79% of standard tillage. Fertilization response was also influenced by regrowthmanagement. Similarly, in a 2-year grain sorghumguar rotation, guar (Cyamopsis tetragonoloba (L.) Taub.) yields were reduced following a grain sorghum (Sorghum bicolor (L.) Moench.) stubble regrowth system.

Key Words: Forage sorghum • Guar • Residue management • Rotation

² Assistant Agronomist, Texas A&M University, Agricultural Research Station, Beeville, and Professor, Soil and Crop Sciences Department, College Station, Texas.

Received for publication October 24, 1969.