Pre-sowing Application Research Articles

INFLUENCE OF DIFFERENT CONDITIONS OF MINERAL NUTRITION ON YIELD OF SWEET SORGHUM SEEDS IN THE CONDITIONS OF THE SOUTHERN FOREST-STEPPE OF WESTERN SIBERIA

Sorghum occupies a significant place in world agriculture and is of particular value in intensive feed production. The selection of agricultural practices for increase of seed productivity is relevant and current, since the availability of own seeds is of decisive importance in reduction of feed production cost. The studies were carried out in Omsk region in 2013, 2015–2017 in a stationary field experiment in eight-field crop rotation. The aim of the work is to study the influence of mineral nutrition conditions on yield of sweet sorghum seeds, water and nutritional regimes of meadow-black soil in the conditions of the south of Western Siberia. The experiment included a three-factor scheme: the supply of soil with mobile phosphorus according to Chirikov (factor A) - average, 50-100 mg/kg (background 0); increased, 100-120 mg/kg (I) and 140-150 mg/kg (II); high, 150-200 mg/kg (III); phosphorus fertilizer (factor B) - P0, P60; nitrogen fertilizer (factor C) - N0, N30, N60. The field experiment was implemented by mutual method of pre-sowing application of mineral fertilizers and different levels of phosphorus in the soil. The soil is meadow-black soil, medium-thick, medium-humus, heavy loamy. The reaction of the soil environment in the arable layer is neutral, the depth of groundwater in spring is 2.86, in autumn - 3.09 m. The climate of the southern forest-steppe of Omsk region is suitable for sweet sorghum cultivation with insufficient moisture in some years and uneven distribution of precipitation during the growing season. The yield of sweet sorghum seeds ranged from 2.93 to 3.46 t/ha on average for 3 years, depending on the background, the largest yield increase was noted on 0 background (N60P60) with a natural level of mobile phosphorus and pre-sowing application of nitrogen and phosphorus fertilizers. It is possible to obtain seeds of sweet sorghum in the southern forest-steppe of Omsk region. To achieve high yields on soils with an average content of mobile phosphorus, it is necessary to use nitrogen and phosphorus fertilizers. It is also indispensable to select an early ripening variety capable of forming high quality seeds in the specific conditions of Siberia.

Вплив доз і способів унесення азотних добрив на врожайність та якість зерна пшениці озимої

Goal. To establish the optimal ratio of sulfur and nitrogen in the composition of mineral fertilizers for fertilizing Sudan grass in conditions of unstable moisture during the growing season. Methods. The field experiment was carried out on typical heavy loam chornozem of the State Enterprise “SI “Hrakivske” of the NSC “ISS named after O.N. Sokolovskyi” (Kharkivskyi district, Kharkiv oblast), where the change in the NPK:S ratio in the composition of mineral fertilizers in crops of Sudan grass was studied; laboratory-analytical studies were performed under current state standards; statistical and mathematical analysis of the obtained data was carried out with the help of the STATISTICA 13 program. The indicators of the efficiency of use (NUtE) and absorption (NUpE) of nitrogen by plants were calculated. Results. With the pre-sowing application of sulfur with fertilizers at the rate of S20–S40 during tillering, the content of its mobile forms in the soil layer of 0–20 cm increased from 9 to 15–44 mg/ kg, which narrowed the ratio of available N:S forms from 3.3:1 to 2.5–0.8:1. This had a positive effect on the accumulation of moisture in plant tissues and the yield of green mass of Sudan grass. When applying N100P60K60S20, the maximum obtained yield of green mass was 52.2 t/ha compared to 39.4 t/ha without the sulfur component. The highest content of nutrients (N — 1.7%, P — 0.55%, K — 1.5%) in mowed green mass was observed when N100P60K60S20–40 was applied, which together with the increase in productivity increased the removal of nutrients by the crop by 1,1–1.5 times. Nitrogen efficiency indicators confirmed the expediency of adding sulfur to the composition of fertilizers, and its optimal dose on the background of N100P60K60 was 20 kg/ha. Conclusions. The addition of sulfur in the sulfate form to the composition of mineral fertilizers for pre-sowing application of Sudan grass on typical heavy loam chornozem optimized the nitrogen-phosphorus-sulfur nutrition of plants, contributed to the increase of irrigation of tissues, increased the efficiency of nitrogen use by plants and the profitability of fertilizers by yield. On the background of N100P60K60, the optimal rate of sulfur addition was S20; increasing it to S60 weakens the positive effect.

Influence of Pre-Sowing Application of Mineral Fertilizers, Root and Foliar Nutrition on Productivity of Winter Tritical Plants

Influence of Pre-Sowing Application of Mineral Fertilizers, Root and Foliar Nutrition on Productivity of Winter Tritical Plants

Міграція нітратного азоту за внесення азотних добрив у виробничих посівах кукурудзи

Goal. To determine the dynamics of the migration of nitrate nitrogen in the soil during the active growing season of corn with the application of nitrogen fertilizers in production conditions. Methods. Field — to determine the dynamics of nitrate nitrogen migration, laboratory-analytical — to determine the content of mineral nitrogen in the soil, mathematical-statistical — to assess the reliability of the obtained data. Results. It is proven that the fractional application of nitrogen fertilizers provides prolonged saturation of the soil with mineral nitrogen at elevated, high, or very high levels during the active growing season of corn. The maximum content of mineral nitrogen was fixed in the upper layer of the soil 0–20 cm. It was established that in typical chornozem, when N136 is applied in the soil layer 0–20 cm, the nitrate nitrogen content decreased over time — from May to September by 5.9 times, with depth — by 2.8–4.8 times in the layer of 100–120 cm compared to its content in the upper layer of 0–20 cm. With the application of N119 and N134, its growth in the soil layer of 0–20 cm was established in the interval between pre-sowing application and top dressing, where the content of nitrate nitrogen decreased at a depth of 100–120 cm compared to the content in the upper layer of 0–20 cm by 1.2–6.1 times. The highest yield of corn grain was obtained with fractional application of N136 and N134 (r = 0.77–0.84). Conclusions. It was established that with the fractional application of N119–N136, the content of nitrate nitrogen in the soil decreased with depth and over time, ensuring the formation of corn grain yield in production conditions of more than 10 t/ha. In dryland areas with deep underground water, it is unlikely that they will be contaminated with nitrate nitrogen at a fractional application of N119–N136/ha, where its maximum content is fixed in the soil layer of 0–20 cm.

Mineral fertilizers as a technique for regulating the productivity of fiber flax

The article analyzes and presents data on the growth and development of the Phoenix fiber flax variety during the growing season, depending on the type and ratio of mineral fertilizers. The object of research was the variety of fiber flax Phoenix. The use of the tested types of mineral fertilizers made it possible to obtain a yield of flax straw up to 9.49 t/ha and seeds up to 0.34 t/ha. In general, the most effective was the use of fertilizers in option 11 (pre-sowing application of NPK(S) 8:20:30(2) + 0.3B at a dose of 200 kg/ha + Ammophos NP 12:52 at a dose of 133 kg/ha + Kalimag 38 at a dose of 137 kg/ha + top dressing in the herringbone phase ammonium nitrate 34.6 at a dose of 59 kg/ha + trace elements), where the level of yield relative to the control increased by an average of 100% for straw and 70% for seeds. All yield data are confirmed by the elements of its structure. Thus, plant height ranged from 68 to 91 cm, technical length - from 54 to 70 cm, number of plants before harvesting - 1232-1616 pcs/ha, seed weight per plant - 0.16-0.22 g, straw weight - 0.40-0.60 g.

Application of mineral fertilizers and bacterial preparations in the cultivation of winter barley on ordinary chernozem in the conditions of the Lower Don

The experiments were carried out in 2018–2021 on ordinary chernozem in the conditions of the Rostov region. The winter barley variety Master was cultivated. The predecessor is corn for grain. Mineral fertilizers included ammonium nitrate (34.4%), ammophos (12-52), nitroammophos (16-16-16). Nitrogen-phosphorus fertilizers (a fertilizer mixture of ammonium nitrate and ammophos) and nitroammophoska (16-16-16) were applied when sowing barley, ammonium nitrate was applied by a surface method randomly in the spring tillering phase. Bacterial preparations contain strains of associative nitrogen-fixing microorganisms: Mizorin, Rizoagrin, Extrasol. They were applied to barley seeds in the pre-sowing period. It has been established that the use of the bacterial preparation Mizorin (600 g/ha) against the background of pre-sowing application of nitrogen-phosphorus fertilizer at a dose of N30P30, nitrogen top dressing with ammonium nitrate at a dose of 30 kg/a.i. ha increased the increase in grain yield on average over three years compared with the control variant (without the use of agrochemicals) by 0.71 t/ha, or 14.4%. The application of the biological preparation Mizorin without mineral fertilizers increased the yield by 0.31 t/ha, or 6.3%, compared to the control variant. In 2019–2021, the average protein content in the grain of winter barley in the control variant was 10.7%, which ensured the collection of protein 525 kg/ha. Against the background of nitrogen-phosphorus fertilizers at a dose of N30P30 and nitrogen supplementation at a dose of 30 kg/ha, the maximum increase in protein content was in the variant using Mizorin, which was 1.1% compared to the control variant, while the protein yield in the crop increased by 138 kg/ha, or by 26.3%.

Chemical Priming with β-aminobutyric acid (BABA) for Seedling Vigor in Wheat (Triticum aestivum L.)

To achieve efficiency in seedling development, the seed must germinate quickly and homogeneously. Pre-sowing applications such as priming are practiced to eliminate or reduce the negative effects of environmental factors through germination and seedling development. This allows to reach a higher germination rate, yield, and desired plant density, especially by protecting against biotic and abiotic stresses. This study was carried out to examine the effects of pre-sowing seed applications on seedling growth and vigor of bread wheat (Triticum aestivum L.). Three different doses of β-amino-n-butyric acid (BABA) were used as seed priming agents and Dimethyl sulfoxide (DMSO) as control groups. The study was carried out according to the completely randomized factorial design with three replications and ten plants per replication. As a result of priming applications, significantly higher values in the number of roots, longest root length, total root length, average root length and shoot fresh weight were obtained compared to control. Our results, for the first time, showed that seed priming with BABA had a promoting effect on many aspects of early seedling growth in bread wheat. This is a preliminary study to understand the mechanism of seed priming and its effects on germination and root growth in wheat. Further studies may shed light on the molecular mechanisms of BABA or other compounds as seed priming agents, benefits for abiotic and biotic stress tolerance, and good stand establishment at the seedling or later stages.

Determination of Herbicide (Gramoxone 20 Ls) for Weed Control as Pre-sowing Application on Wheat

During two successive rabi seasons 2019-20 and 2020-21, a field experiment was undertaken at the Regional Station of Bangladesh Wheat and Maize Research Institute (BWMRI), Gazipur to establish the optimum amount of herbicide application (Gramoxone) before sowing wheat under late-planted conditions. Four optimum doses of application were applied as pre-emergence. Herbicide (Gramoxone) spraying at 6 liter/ha for 5 days before sowing provided the best weed control. The experiment was laid out in a randomized complete block design (RCBD) with 3 replications. The major weeds in the experimental plot such as Biskatali (Polygonium hydropiper), Chapra (Elusine indica), Bathua (Chenopodium album), Banpalong (Sanchus arvensis) and Banmasure (Vicia sativa) were found. Weed count was 92 m2 and 89 m2 in 2019-20 and 2020-20 respectively, when herbicide (Gramoxone) was sprayed @ 12 liter/ha at 5 days before sowing (DBS). Highest weed monitoring efficiency (78%) in T2=herbicide (Gramoxone) treatment @ 6 liter/ha at 5 DBS. Grain yield and wheat biological yield were statistically diverse, while the other metrics were insignificant. When herbicide (Gramoxone) was treated at 6 liter/ha at 5 DBS, a numerically greater average grain yield (2.57 t/ha) was obtained. The control plot produced a numerically lower average grain yield (1.56 t/ha). When herbicide (Gramoxone) was administered at 6 liter/ha at 5 DBS, the maximum benefit-cost ratio (BCR) was 1.30 which is the best method for weed management prior to wheat application.

Exploring the Effects of Different Stubble Tillage Practices and Glyphosate Application Combined with the New Soil Residual Herbicide Cinmethylin against Alopecurus myosuroides Huds. in Winter Wheat

Effective control of Alopecurus myosuroides Huds. (blackgrass) solely with a chemical treatment is not guaranteed anymore because populations exhibit resistance to almost all herbicide modes of action. Integrated weed management (IWM) against blackgrass is necessary to maintain high weed control efficacies in winter cereals. Four field experiments were conducted in Southwest Germany from 2018 to 2020 to control A. myosuroides with a combination of cultural and chemical methods. Stubble treatments, including flat, deep and inversion soil tillage; false seedbed preparation and glyphosate use, were combined with the application of the new pre-emergence herbicide cinmethylin in two rates in winter wheat. Average densities of A. myosuroides in the untreated control plots were up to 505 plants m−2. The combination of different stubble management strategies and the pre-emergence herbicide cinmethylin controlled 86–97% of A. myosuroides plants at the low rate and 95–100% at the high rate until 120 days after sowing. The different stubble tillage practices varied in their efficacy between trials and years. Most effective and consistent were pre-sowing glyphosate application on the stubble and stale seedbed preparation with a disc harrow. Stubble treatments increased winter wheat density in the first year but had no effect on crop density in the second year. Pre-emergence application of cinmethylin did not reduce winter wheat densities. Multiple tactics of weed control, including stubble treatments and pre-emergence application of cinmethylin, provided higher and more consistent control of A. myosuroides. Integration of cultural weed management could prevent the herbicide resistance development.

Influence of the application of UAN-32 and solid nitrogen and complex fertilizers on the yield and quality of oil flax seeds

In the course of two years of research, the effect of application of liquid nitrogen fertilizer UAN-32, ammophos and diammophos, as well as their combined use, pre-sowing application of solid nitrogen fertilizers - ammonium nitrate and ammonium sulfate - was studied. Studies have shown that under conditions of unstable moisture supply, pre-sowing and starter application of these fertilizers in combination with N69P26 provides a yield of 17.3 c/ha (54.4% increase) N42P42 - 14.1 c/ha (30.5% increase) and N59P42 - 14.8 c/ha (37% increase). The application of UAN-32 at a dose of 150 l/ha with a high supply of soils with phosphorus and potassium increases the yield by 35.7 (15.2 c/ha). The introduction of UAN-32 at a dose of 150 l/ha, against the background of a high soil supply with phosphorus and potassium, increases the yield by 35.7 (15.2 c/ha). The oil yield for these variants increased from 4.6 - 4.61 c/ha to 7.54; 6.1 and 6.51 c/ha, and protein from 2.8-1.77 c/ha to 4.35 and 2.29-2.71 c/ha. Combinations of UAN-32 with ammophos and diammophos contribute to the formation of a higher oil content in seeds, and an increase in the nitrogen dose increases the protein content and yield.

The influence of agrochemicals on the yield and quality of soybean when growing using No-till technology

The article presents the results of field experiments carried out in 2018-2020 on the fields of EkoNivaAgro LLC at the Levoberezhnoye farm (Liskinsky district, Voronezh region). The objects of the study were the Canadian soybean variety OAK Prudence, the Argentinean inoculant of the liquid formulation Nitragin Zh, the fungicidal dressing agent Delit Pro, KS, pyraclostrobin 200 g / l (BASF, Germany). Soybeans were grown using the NO-TILL technology after the predecessor corn for grain. The yield of soybean grain in the control variant (without the use of agrochemicals) was the highest in 2018, favorable for moisture (1.50 t / ha) and practically the same in 2019 and 2020. - 1.24 and 1.23 t / ha, respectively. On average for 2018–2020 the yield of soybean grain in the control variant was 1.32 t / ha. The maximum grain yield was obtained on the variant with the combined use of the inoculant Nitragin Zh and ammonium nitrate at a dose of 200 kg / ha - 2.08 t / ha. The increase in comparison with the control variant reached 0.76 t / ha, or 57.0%. The greatest influence on the technological parameters of soybean seeds was exerted by pre-sowing inoculation of seeds and pre-sowing application of nitrogen fertilizers at a dose of N70. Inoculation provided an increase in the protein content in soybean seeds by 4.1%, and the introduction of N70 by 4.3% in absolute terms compared to the control.

The impact of mineral nutrition on winter barley yields while using mustard as a precursor crop

The impact of mineral nutrition on winter barley yields while using mustard as a precursor crop

Influence of mineral nutrition on yield yield and quality of winter wheat surflower

Influence of mineral nutrition on yield yield and quality of winter wheat surflower

FORMATION OF YIELD OF OISEED RADISH AT GROWING DOSES OF MINERAL FERTILIZERS BY PRE-SOWING APPLICATION ON GRAY FOREST SOILS

The article reflects the results of studying the effectiveness of options for fertilizing oilseed radish on gray forest soils in the option of their pre-sowing use for the formation of yield of both leafy mass and seed yield, taking into account the complex use of this agricultural crop. A review of the characteristics of the mineral nutrition of oilseed radish over a long-term cycle of its study is made and aspects of its nutrition and the appropriateness of the use of mineral fertilizers are determined. The features of the use of both single-component fertilization options for the introduction of nitrogen, phosphorus and potassium, and the complex use of these nutrients for the mutual binary and complex application have been studied. The specified fertilization options were formed in an increasing order of norms from the control option without fertilizers to the complex application of N180P150K150, which made it possible to systematize the feasibility of each option and determine the possibility of using both the minimum additional mineral nutrition and high doses exceeding the recommendations for oil radish. It has been established that the main growth processes in the oilseed radish of the ‘Zhuravka’ variety, as a combined genotype of fodder and seed-growing use, are determined by high-grade nitrogen nutrition, and the norm is in the range of 60-90 kg/ha of active substance with a more expedient combination with chlorine-free potassium fertilizers type of kalimagnesia –was the most technologically expedient for realizing the yield potential of the leafy mass of oil-bearing radish on gray forest soils. At the same time, it was proved that the effectiveness of the effect of additional mineral nutrition when using oilseed radish to obtain leafy mass depends on the hydrothermal conditions of its vegetation with a reduction of the proposed norms in conditions of insufficient soil and atmospheric moisture for the period of application of pre-sowing fertilizer. It has been proved that the maximum yield of oil-bearing radish seeds in the ‘Zhuravka’ variety is formed in the variants of the pre-sowing application of additional mineral nutrition due to the introduction of N90P30-60K30-90 of the same forms of potash fertilizers, which ultimately ensures maximum yield levels of conditioned seeds with an indicator weight 1000 at the level of 10-11 g with the content of fat in the seeds on an absolutely dry weight at the level of 37-39.5%.

Formation of the quality of barley grain with modern technologies in the Volga region

The article presents studies in the six-field grain-fallow crop rotation (2011-2018) to determine the impact of various technologies on the quality of spring barley grain in the chernozem steppe of the Middle Volga region. During the years of research in 2011, 2014 and 2017, favorable conditions for the growth of cultural development were noted (SCC for May–July 0.64-1.33). In 2015 and 2018 – unfavorable (SCC 0.45-0.53), in the rest – conditions were close to normal. It is established that intensive technologies with minimal tillage, without reducing the yield of barley, in comparison with the traditional one, do not worsen the indicators of the nature and weight of 1000 seeds. The grain quality indicators were significantly influenced by the SCC of the growing season of the crop. Improving the moisture content of crops contributed to an increase in the nature of grain from 614.0-627.4 g / l to 641.2-655.6 g / l (2.4-6.5 %), the weight of 1000 seeds from 35.2-37.2 g to 42.1-44.2 g (14.2-23.0 %). The highest protein content was found in dry years – 12.2-13.8 %, which is 0.1-2.1% more than in wet years, while the combined use of intensification agents (fertilizers, herbicides, insecticides) on technologies with minimal tillage provided a greater degree of protein stabilization in different weather conditions in years. To increase the efficiency, yield and stabilization of grain quality at the level of the required indicators, a technology with minimal tillage, complex application of plant protection products against pests and weeds, and pre-sowing application of ammonium nitrate N30 is proposed.

Working body for pre-sowing application of liquid mineral fertilizers in the soil

Working body for pre-sowing application of liquid mineral fertilizers in the soil

Cultivation of Coriander in the Conditions of the Foothill Zone of the Republic of Ingushetia

This paper presents a comprehensive study of the features of growth and development of coriander. The study aims to assess the effect of fertilizers, sowing time and seeding rates on the passage of phenological phases, plant height, sowing quality of seeds, leaf area and essential oil content. The paper addresses the issue of using carbon derivatives (fullerenes) as growth stimulants. The effects of fertilizers and fullerenes on plant height and laboratory seed germination are compared. The effects of the pre-sowing application of nitrogen and phosphorus fertilizers and of foliar application of double superphosphate are highlighted and described. It is shown that the change in coriander leaves is dependent on the level of plant nutrient supply. The effects of sowing time and soil nutrient levels on the seed yield are considered. The study shows which factors had a greater impact on the content of essential oil in coriander fruits and, accordingly, on its harvest. The practical experience of coriander cultivation in the conditions of the foothill zone of the Republic of Ingushetia is summarized.
 Keywords: coriander, fertilizer, phenological phases, fullerenes, essential oil

Влияние сроков сева и способов борьбы с сорняками на рост, развитие и урожайность подсолнечника в технологии прямого посева

Abstract. When cultivating sunflower using direct seeding technology, its yield largely depends on the time of sowing and the effectiveness of weed control. The purpose of the research is to study the influence of sowing dates and methods of weed control on the growth, development and productivity of sunflower cultivated using direct seeding technology in the zone of unstable moisture in the Stavropol territory. Methods. Field studies were conducted in the experimental field of the North Caucasus Federal research center (zone of unstable moisture of the Stavropol territory) in 2018–2019, where the objects of research were sunflower crops on April 5–10, April 25–30 and May 15–20, cultivated using direct seeding technology with herbicides according to the following scheme: without the use of herbicides (control), spraying of weeds with a continuous herbicide from the group of glyphosates 5–7 days before sowing sunflower (glyphosate), glyphosate + soil herbicide, which was sprayed on plots after sowing the crop, and glyphosate + herbicide Euro-Lightning, used in the phase of 3–4 pairs of real sunflower leaves. Results. It was found that the transfer of sunflower sowing dates from April to the second decade of may leads to an increase in field germination of seeds, reducing the negative impact of atmospheric and soil drought during the growing season of the crop, which ensures the formation of a significantly greater vegetative mass of plants compared to the April sowing dates. The highest yield is formed by sunflower when sown in the second decade of May with the pre-sowing application of a continuous herbicide from the group of glyphosates in combination with a soil herbicide (2.45 t/ha) and the same glyphosate with the spraying of crops with Euro-Lightning herbicide in the phase of 3–4 pairs of leaves – 2.41 t/ha. Sowing sunflower in April, as well as the refusal to use herbicides or only pre-sowing spraying of the soil with glyphosate leads to a significant decrease in crop yield.

Засоренность и продуктивность посевов горчицы белой (Sinapis alba L.) в зависимости от нормы высева и дозы азота

Currently, one of the most urgent tasks facing humanity is the preservation of the environment. Development of agricultural practices aimed at reducing chemical load when growing white mustard helps to reduce the negative impact of human agricultural activities on the environment. The aim of the research was to determine seeding rates andN fertilizer dosesat which white mustard plants will actively suppress weeds without overall yield decrease. The studies were carried out in 2017–2019. Soil – chernozem southern low-humus (humus content – 2.08–2.31 %). The content of mobile phosphorus and potassium (according to Machigin method) is 62–90 and 389–586 mg/kg soil, respectively. The experimental design included: Factor A – five options of N fertilizer application: N0 (control variant), N20, N40, N60 and N80; Factor B – six options of seeding rate: 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 million per hectare. Crop under study – white mustard variety ‘Raduga’. In the course of the research, we have found that the competitive ability of mustard plants against weeds increased with an increase in seeding rate, regardless of the weather conditions of the year. Significant weeds growth and development suppression was noted at a seeding rate of 2 million per ha, the dry weight of one weed in this case was 1.3 g, which was three times less than at a seeding rate of 0.5 million/ha (4.1 g). Seeding rate increase to 2.5 and 3.0 million per ha did not provide reliable suppression of weeds; dry weight of one weed was 1.2 g. The highest seed yield of white mustard (0.6 t/ha) was obtained at a seeding rate of 2 million/ha. This option exceeded others by 0.02–0.14 t/ha. Optimal N fertilizer dose (pre-sowing application) was N60; seed yield of white mustard, in this case, was 0.63 t/ha. Despite the fact that N60 had a positive effect on the growth and development of weeds, it also provided a significant yield increase compared to control – 0.21 t/ha (50 %).

Pre-sowing application of combinations of burndown and pre-emergent herbicides for Conyza spp. control in soybean

Together, Conyza bonariensis, C. canadensis and C. sumatrensis show 105 reported cases of biotypes resistant to herbicides like glyphosate, paraquat, and acetolactate synthase (ALS) inhibitors. The application of pre-emergent herbicides combined with burndown herbicides is believed to be effective in controlling Conyza spp. during soybean pre-sowing management. The objective of this study was to evaluate the efficacy of sulfentrazone/diuron, imazethapyr/flumioxazin, and diclosulam in mixtures with diquat, paraquat, or glufosinate on the control of Conyza spp. Two field experiments were conducted in a randomized block design with four replicates. Treatments consisted of the application of pre-emergent plus burndown herbicides, besides the weedy control treatment (without application), for a total of 10 treatments. The control of Conyza spp. was evaluated at 7, 14, 21, 28, and 35 d after herbicide application, and symptoms of injury in soybean plants were evaluated at 14, 21, 28, and 35 d after herbicide application. The herbicides sulfentrazone/diuron, imazethapyr/flumioxazin, and diclosulam in combination with burndown herbicides diquat, paraquat, or glufosinate were effective in controlling Conyza spp. in the pre-sowing management of soybean, highlighting good options for pre- and post-emergent herbicide rotations. Mixtures with diclosulam showed a higher potential for injury to soybean plants than sulfentrazone/diuron and imazethapyr/flumioxazin.