THE NARROW ROW INCREASES SOYBEAN YIELD
Abstract
The objectives of the present study were to evaluate the effects of plant arrangement (row spacing and plant population) and fertilization levels on yield components and soybean yield. The experiment was performed at the Agronomic Experimental Station of Universidade Federal do Rio Grande do Sul (EEA/UFRGS), in Eldorado do Sul, Rio Grande do Sul, Brazil, in the 1996/97 growing season, in a Dark Red Podzolic sofi. The treatments were arranged in a split split-plot randomized complete-block design, white four replications. The cultivar tested was 1FT-Saray' (carly), in no-till. The treatments tested were three fertility levels (without fertilization, the recommended and twice the recommended fertilization), two populations (30 and 40 plants/m2) and two row spacing (20 and 40 cm). The average grain yield of 4871 kg/ha, was modified by the row spacing, where in 20 cm the grain yield was of 5420 kg/ha, 1098 kg/ha greater than in 40 cm rows (4322 kg/ha). In the row spacing of 20 em the number of pods per m2 was 1789, 16% greater than the 1544 produced in 40 cm, being this the most important component in the yield increase in 20 cm rows.
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