Deep and Shallow Fall Tillage for Irrigated Soybean Grown with Different Weed Management Systems in the Midsouthern USA

Abstract

Heatherly et al., 2002) and on coastal plain soils in the southeastern USA (Frederick et al., 1998). Management inputs that maximize economic return from earlyDeep tillage is used to disrupt the soil profile below determined that net return was greatly increased from Postemergent-only weed management was the cheapest for both GR this practice. The increased production was associated and non-GR cultivars. Weed management that used POST-only with increased moisture content in the soil, presumably glyphosate resulted in the greatest yield and profit from GR cultivars.because of greater infiltration and storage of winter rainWith non-GR cultivars, yields were not affected by weed management, resulting from fall DT. This work has been used to but net returns were lower when the most intensive weed management promote DT of dry clay soils in the fall in the midsouthwas practiced.

Mid‐South Soybean Yield and Net Return as Affected by Plant Population and Row Spacing

“…However, the pod‐fill period of these MGs inconveniently coincides with the mid‐June through late‐August drought that is common in the region, subsequently limiting yield potential (Heatherly and Hodges, 1998). To avoid the effects of mid‐ or late‐season drought, producers have increasingly adopted an early soybean production system (ESPS) in which earlier maturing soybean cultivars, such as MG 00 through MG IV, are planted in late March or early April, allowing plants to take advantage of the region's water availability earlier in the growing season (Boquet, 1998; Heatherly and Hodges, 1998; Heatherly et al, 2004; Popp et al, 2004). For these reasons, MG IV cultivars have been widely adopted in the Mid‐South as an alternative to MG V and VI cultivars (Hill et al, 2003).…”