Planting date, seeding rate, soil texture, and row configuration are important factors in soybean production. Each of these factors can impact overall production and yield of soybean immensely. Growers can have difficulty making decisions about how to best manage their production systems with these factors in mind. Therefore, research was conducted from 2019 to 2021 at the Delta Research and Extension Center in Stoneville, MS, to evaluate the agronomic performance, yield components, and weed control of soybean planted with different planting dates, row configurations, soil textures and/or seeding rates. Common row configurations utilized in Mississippi soybean production were compared to a triple-row configuration on raised beds. First planting dates occurred from late-April to early-May and second planting dates followed three weeks later. Each row configuration was planted at 320,000 seed ha-1 for agronomic studies. Seeding Rate Study was initiated where triple-row configuration plots were planted at 320,000, 445,000, and 553,000 seed ha-1. Total dry matter (TDM) was determined by removing a m-2 in each plot at soybean growth stage R6.5 and allowing samples to dry down and weigh them. Harvest index was determined by collecting seed from TDM samples and weighing them. Pod node-1, seed number, and node plant-1 were determined by collecting five random plants from each plot and counting the total number of pods, seed, and nodes. Soybean planted on silt loam at the first planting produced lower seed weight, seed number, and harvest index than soybean on clay soil at either planting date. Two row configurations, single- and triple-row, were planted on raised beds for weed control studies. Programs included PRE only, EPOST, LPOST, PRE fb EPOST, PRE fb LPOST, and PRE fb EPOST fb LPOST. Herbicide timings included 7, 14, 21, and 28 DA-crop emergence and each timing was followed by a sequential application 14 d after the initial application. Triple-row configuration had lower plant densities and produced lower yield than single- and twin-row configurations. Triple-row configuration soybean planted on clay soil and at 445,000 and 553,000 seed ha-1 produced greater yield than any other seeding rate or soil texture.

Made available in DSpace on 2016-01-26T18:56:22Z (GMT). No. of bitstreams: 1 Dissertacao.pdf: 291613 bytes, checksum: 351209f8c0af1b2f460925dd83ce0a2d (MD5) Previous issue date: 2010-11-17 / Soybean is considered the main crop in Brazil due to both volume production and income. Many factors have contributed to a good performance of this crop in this country, such as adaptability of cultivars to many regions. The objective of this research was to evaluate soybean performance of early, semi-early and intermediate maturity cultivars in a sandy loam, clayey and very clayey Eutrudox. The experiment was carried out in Naviraí, Mato Grosso do Sul, Brazil, São Francisco Farm, in 2008/2009. The experimental design was the completely randomized block with four replications. The following soybean cultivars were evaluated: a) Early maturity: CD 202, CD 208 and CD 214RR; b) Semi early maturity: BRS 239, BRS CharruaRR and BRS 245RR; and c) Intermediate maturity: CD 219RR and Monsoy 8001. Sowing was conducted over maize residues on November, 15th, 2008 under no tillage system and 333 kg ha-1 of fertilizer was applied. The number of pods per plant, number of grains per pod, weight of 1,000 grains and yield (kg ha-1) were evaluated. Fertilization and maintenance of intermediate-high nutrient levels in Eutrudox soils of any textures provides conditions for soybean cultivars to express high yield potentials. / A soja é a principal cultura do País tanto em volume como em geração de renda, sendo que vários fatores tem contribuído para esse bom desempenho no Brasil, dentre eles podemos citar a adaptabilidade de cultivares ás diferentes regiões produtoras. O objetivo deste trabalho foi de avaliar o desempenho de cultivares de soja dos ciclos precoce, semiprecoce e médio em Latossolos Vermelhos com diferentes classes texturais. Latossolo Vermelho Eutrófico textura média, Latossolo Vermelho Eutrófico textura argilosa e Latossolo Vermelho Eutrófico textura muito argilosa. O experimento foi conduzido no município de Naviraí Estado de Mato Grosso do Sul, na Fazenda São Francisco, na safra agrícola 2008/2009. O delineamento experimental foi de blocos inteiramente casualisados com quatro repetições. Os cultivares de soja utilizados foram: a) Ciclo precoce: CD 202, CD 208 e CD 214RR; b) Ciclo semiprecoce: BRS 239, BRS CharruaRR, BRS 245RR e c) Ciclo médio: CD 219RR e Monsoy 8001. Em todos os solos o plantio ocorreu no dia 15 de novembro de 2008, em sistema de plantio direto sobre a resteva de milho com adubação de 333 kg ha-1. Foram avaliados os parâmetros de número de vagens por planta, número de grãos por vagens, peso de mil grãos e calculado produtividade em quilogramas por hectare. Independente da classe textural, a fertilização e manutenção de médios a altos teores de nutrientes nos LATOSSOLOS VERMELHOS Eutróficos de textura média a muito argilosa possibilita a expressão fenotípica de altas produtividades agrícolas de grãos pelas cultivares de soja.

Made available in DSpace on 2016-07-18T17:51:06Z (GMT). No. of bitstreams: 1 Dissertacao.pdf: 291613 bytes, checksum: 351209f8c0af1b2f460925dd83ce0a2d (MD5) Previous issue date: 2010-11-17 / Soybean is considered the main crop in Brazil due to both volume production and income. Many factors have contributed to a good performance of this crop in this country, such as adaptability of cultivars to many regions. The objective of this research was to evaluate soybean performance of early, semi-early and intermediate maturity cultivars in a sandy loam, clayey and very clayey Eutrudox. The experiment was carried out in Naviraí, Mato Grosso do Sul, Brazil, São Francisco Farm, in 2008/2009. The experimental design was the completely randomized block with four replications. The following soybean cultivars were evaluated: a) Early maturity: CD 202, CD 208 and CD 214RR; b) Semi early maturity: BRS 239, BRS CharruaRR and BRS 245RR; and c) Intermediate maturity: CD 219RR and Monsoy 8001. Sowing was conducted over maize residues on November, 15th, 2008 under no tillage system and 333 kg ha-1 of fertilizer was applied. The number of pods per plant, number of grains per pod, weight of 1,000 grains and yield (kg ha-1) were evaluated. Fertilization and maintenance of intermediate-high nutrient levels in Eutrudox soils of any textures provides conditions for soybean cultivars to express high yield potentials. / A soja é a principal cultura do País tanto em volume como em geração de renda, sendo que vários fatores tem contribuído para esse bom desempenho no Brasil, dentre eles podemos citar a adaptabilidade de cultivares ás diferentes regiões produtoras. O objetivo deste trabalho foi de avaliar o desempenho de cultivares de soja dos ciclos precoce, semiprecoce e médio em Latossolos Vermelhos com diferentes classes texturais. Latossolo Vermelho Eutrófico textura média, Latossolo Vermelho Eutrófico textura argilosa e Latossolo Vermelho Eutrófico textura muito argilosa. O experimento foi conduzido no município de Naviraí Estado de Mato Grosso do Sul, na Fazenda São Francisco, na safra agrícola 2008/2009. O delineamento experimental foi de blocos inteiramente casualisados com quatro repetições. Os cultivares de soja utilizados foram: a) Ciclo precoce: CD 202, CD 208 e CD 214RR; b) Ciclo semiprecoce: BRS 239, BRS CharruaRR, BRS 245RR e c) Ciclo médio: CD 219RR e Monsoy 8001. Em todos os solos o plantio ocorreu no dia 15 de novembro de 2008, em sistema de plantio direto sobre a resteva de milho com adubação de 333 kg ha-1. Foram avaliados os parâmetros de número de vagens por planta, número de grãos por vagens, peso de mil grãos e calculado produtividade em quilogramas por hectare. Independente da classe textural, a fertilização e manutenção de médios a altos teores de nutrientes nos LATOSSOLOS VERMELHOS Eutróficos de textura média a muito argilosa possibilita a expressão fenotípica de altas produtividades agrícolas de grãos pelas cultivares de soja.