Planting Method and Plant Population Influence on Soybeans1
- D. L. Wright,
- F.M. Shokes and
- R. K. Sprenkel2
No-tillage planting of crops usually results in fewer plants per unit of row than the same planting rate with conventional planting. This research was conducted to relate soybean [Glycine max (L.) Merr.] population density under conventional and no-till plantings to yield and plant growth differences on a Norfolk sandy loam soil (fineloamy, siliceous, thermic Typic Paleudult). ‘Bragg’ soybean were planted in the field with conventional and no-till planters in 0.76 m wide rows during 1979, 1980, and 1981. Highest yields usually occurred at 20 plants m−1. Yield, plant height, seed weight, and stem diameter differed little in relation to planting method except that seed weight was lower for no-till plantings in the driest year (1981). Yield and plant height increased and seed weight and stem diameter decreased in relation to population density between 1.5 and 13 plants m−1 row, and then changed gradually to populations of 27 plants m−1 row. Adequate rainfall received during the pod-fill period of 1979 (August and September) increased yield, plant height, and seed weight more than the planting method in any year.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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