Influence of Between and Within‐Row Spacing on Agronomic Characteristics of Irrigated Soybeans¹

Abstract

Several workers have reported on the effect of varying between and within‐row spacing on soybean (Glycine max (L.) Merr.) yield but few have used irrigated soybeans. We studied two row‐widths, and two in‐row spacings in a split‐split plot arrangement in 1969 and 1970 using five soybean cultivars on irrigated plots. Plants in '46‐cm row width or 3.8‐cm within‐row spacing were taller, lodged more, and produced fewer nodes, branches, pods on branches, pods on main stem, and total seeds on a per plant basis. Height to the first pod increased as row‐width or in‐row spacing decreased. Spacings between or in rows affected neither seed weight nor quality. Highest yields resulted at the lower plant density in narrow rows in 1969, and at the higher plant density in wider rows in 1970. Row‐width ✕ within‐row spacing and row‐width ✕ cultivar interactions were significant for some of the characteristics measured.

Sicklepod (Cassia obtusifolia L.) competition with soybeans as influenced by row spacing, density, planting date, and herbicides / by Jerry Holland Jordan, Jr.

“…Basnet et al . (4) found that in narrow rows the first pods were produced 3 to 9 cm higher above ground level than those in wider soybean row spacings.…”

“…One disadvantage is that soybeans planted in narrow rows tend to be lodged more than wide row soybeans (4,19,66). Hartwig (43) states that planting more than 10 to 12 soybean seeds per 0.3 m of row gives better early season weed control but a greater amount of loding usually results.…”

The influence of soybean planting density on dinitrogen fixation and yield

“…He observed that thick plantings are conducive to lodging and delayed maturity, but the highest yields were with the 4-cm spacing. Subsequent research has focussed on yield characteristics of several varieties under different agronomic conditions (Basnet et al, 1974;Cordonnier and Johnston, 1983;Dose and Thurlow, 1974;Lehman and Lambert, 1960;Munoz et al, 1983). Thus, we postulated the increase in net canopy photosynthesis which occurs at high density compared to low density planting should result in an increased dinitrogen fixation rate and higher yields without a decrease in nutritional quality of the beans.…”

Investigating the Effect of Various Seed Rates on Phenological Characteristics, Yield Components and Seed and Oil Yields in Soybean Cultivars in Mazandaran Province

“…Increase in density has not a significant effect on yield by means of regulating distances and in some cases leads to decrease in yield. As reducing the density, the number of pods per minor and main branches and the number of grain per plant, seed weight are increased but the density has no any effect on 1000-kernel weight 19 .…”