Submitted to: American Peanut Research and Education Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: April 1, 2002
Publication Date: March 1, 2003
Technical Abstract: Peanut (Arachis hypogaea L.) are typically planted in a single or twin row orientation, however, research indicates that peanut planted at equidistance between rows and plants in alternating rows (diamond shape) and using the same planting rate can increase pod yield. A study was conducted to evaluate peanut pod yield and peanut kernel quality with different row orientations and seeding rates when irrigated using subsurface drip irrigation (SDI). Peanuts were planted using three row orientations (single, twin and diamond: S, T, and D, respectively) and two seeding rates (9.8 and 19.7 seeds ha-1) replicated three times at two locations (Sasser and Shellman, GA). The soils are a Tifton sandy loam (fine_loamy, kaolinitic, thermic Plinthic Kandiudults) and Greenville fine sandy loam soil (fine, kaolinitic, thermic Rhodic Kandiudults). There was no yield difference between sites but the quality grades were different between sites. Both T and D had the same pod yield (5395 kg ha-1) but had 15% higher yield than the S orientation (4595 kg ha-1). The higher seed rate increase pod yield by 7% compared to the lower seed rate. Peanut grades (TSMK) were higher at Shellman (74.3%) than Sasser (73.3%). Both T and D had the same TSMK and were 1.5 percentage points higher than the S (72.8%) orientation. There was no grade difference with seeding rate. The S row orientation had lower grades at both sites. The Sasser site had lower grades with T and D orientation than at the Shellman site. Overall, both T and D had higher yield and grade than S at both sites.