Herbicides In Soil Research Articles

SOIL FLUID, CS – A NEW HERBICIDE TO CONTROL WEEDS IN POTATO CROPS

The article presents the results of studying the biological and economic efficiency of the herbicide Soil Fluid, CS (600 g/l of metribuzin) in potato crops in 2018–2019.

Features of saflor productivity formation depending on agricultural growing

Features of saflor productivity formation depending on agricultural growing

Ameliorative effects of biochar on persistency, dissipation, and toxicity of atrazine in three contrasting soils

The presence of atrazine a persistent herbicide in soil poses a serious threat to the ecosystem. The biochar amendment in soil altered the fate of this herbicide by modifying the soil properties. The present study examines the dissipation and toxicity of atrazine in three contrasting soils (silty clay, sandy loam, and sandy clay) without and with biochar amendment (4%). The experiment was performed for 150 days with three application rates of atrazine (4, 8, and 10 mg kg−1). The speciation and degradation of atrazine, metabolite content, microbial biomass, and enzymatic activities were evaluated in all treatments. Three kinetic models and soil enzyme index were calculated to scrutinize the degradation of atrazine and its toxicity on soil biota, respectively. The goodness of fit statistical indices suggested that the first-order double exponential decay (FODE) model best described the degradation of atrazine in silty clay soil. However, a single first order with plateau (SFOP) was best fitted for atrazine degradation in sandy loam and sandy clay soils. The half-life of atrazine was higher in sandy clay soil (27-106 day−1) than silty clay (28-77 day−1) and sandy loam soil (27-83 day−1). The variations in the dissipation kinetics and half-life of the atrazine in three soil were associated with atrazine partitioning, availability of mineral content (silica, aluminum, and iron), and soil microbial biomass carbon. Biochar amendment significantly reduced the plateau in the kinetic curve and also reduced the atrazine toxicity on soil microbiota. Overall, biochar was more effective in sandy clay soil for the restoration of soil microbial activities under atrazine stress due to modulation in the pH and more improved soil quality.

The impact of soil herbicides on the yield and quality of lavender (Lavandula angustifolia Mill.) essential oil

During the period 2014 – 2015 the herbicidal effect and the selectivity of isoxaflutole (Merlin 750 WG), oxadiargyl (Raft 400 SC), imazamox (Pulsar 40) and flumioxazine (Pledge 50 VP) were studied on lavender fields, Hemus and Jubilejna varieties. The present work focuses on the influence of low doses of the applied preparations on the yield and composition of the essential oil compared with untreated control. The results of two-year studies show that the treated variants have a higher yield on average of 0.7-1.6 kg / dka. The odoriferous ingredients range in the limits: linalyl acetate (20.0 - 38.6 %); linalool (20.6 - 46.2 %); lavandulyl acetate (1.9 - 5.9 %); 1,8 cineole (0,4 - 4,9 %) and camphor (0,2 - 0,6 %). Applying oxidiarigil results in greater changes in the composition of the Jubilejna variety, whereas the Hemus variety has the most influence by isoxaflutole.

Equilibrium, Kinetic and Thermodynamic Studies on Adsorption of Penoxsulam in Punjab Soils

ABSTRACT Adsorption desorption behavior of herbicide in soil plays important role in assessing the fate of herbicide. Batch equilibrium method was used to assess the effect of physicochemical properties of soil and temperature on adsorption-desorption of penoxsulam in Punjab soils under laboratory conditions. The adsorption of penoxsulam in studied soils followed pseudo-second-order kinetics and fitted well into Freundlich and Langmuir model. Freundlich adsorption coefficient varied from 0.858 to 1.585 µg1−1/n g−1ml1/n indicating strong binding of penoxsulam on soil matrix. Adsorption increased with increase in temperature and thermodynamic parameters showed that adsorption process was feasible, spontaneous and endothermic. Desorption was slow with hysteresis coefficient ranging from 0.016 to 0.207. Adsorption was dominant by surface adsorption at low equilibrium concentration while partition at high equilibrium concentration. Principal component analysis (PCA) indicated that penoxsulam was moderately mobile in soil and can potentially contaminate groundwater. Highest leachability of penoxsulam was in loamy sand followed by sandy loam, loam, silt loam and clay loam. Remedial methods like the addition of organic amendments helps in reducing downward movement of penoxsulam and avoid its potential adverse effects.

Efficacy of Weed Management Techniques on Weed Control, Biomass Yield, and Soil Herbicide Residue in Transplanted Wild Marigold (Tagetes minuta L.) under High Rainfall Conditions of Western Himalaya

A reduced herbicide rate with hand-weeding (HW) can act as a safer and sustainable approach for weed control. A field study was conducted at CSIR-IHBT, Palampur, India during 2018 and 2019 to analyze the efficacy of herbicides in combination with manual weeding on weed control and the yield of wild marigold (Tagetes minuta L). The experiment was laid with 12 treatments, consisting of two herbicide dosages with prescribed and reduced rates (R) of pendimethalin, imazethapyr, and carfentrazone-ethyl, along with integration of reduced-rate herbicide treatments with HW. The weed population, dry matter, and the crop biomass yield had a significant effect on different weed-control treatments. Imazethapyr (R) with HW recorded a reduced weed number (9.64 m−2) and weed dry matter (13.64 g m−2) and a greater biomass yield (235.03 q ha−1). All the herbicides with integration with HW decreased the weed infestation and enhanced the biomass yield. The weed control efficacy of imazethapyr was higher than pendimethalin and carfentrazone-ethyl. Weed infestation in reduced doses of herbicides with HW was lower than in recommended doses. Herbicide residues in the soil of all herbicides at both the dosages were below the detectable limit (<0.001 μg g−1). Therefore, a reduced dose of imazethapyr integrated with HW can be prescribed to T. minuta growers as a more sustainable approach.

Glyphosate-based herbicides alter soil carbon and phosphorus dynamics and microbial activity

Glyphosate is among the most used herbicides worldwide. However, both the active ingredient and additives of the commercial formulations may adversely affect chemical and biological processes in soil. Therefore, the aim of this work was to evaluate the effect of glyphosate and the commercial formulation (CH) on soil C, N and P dynamics, and microbial enzyme activity in two soil management conditions: a nopal plot (NP) with an history of 5 years of glyphosate application, and in an abandoned plot (AP) with a history of previous agricultural management without glyphosate applications. We performed three experiments: a) glyphosate and CH effects on phosphorus sorption by performing a non-biological P fixation experiment; b) glyphosate and CH effects on microbial activity, C, N and P dynamic, and the biodiversity of soil microorganisms in terms of biomarker fatty acids after a 27 day incubation experiment; and c) glyphosate and CH degradation was tested isolating bacteria from the incubated soil samples and growing in a defined media with potassium phosphate, glyphosate or CH as sole source of P. Our results suggested that other compounds from CH may be affecting P sorption, because when the herbicide was applied, P sorption was reduced in the NP, but in AP soil no significant effects were observed. In contrast, in the AP soil both glyphosate and the CH reduced C mineralization. Besides, CH application reduced Pmic concentration and laccase activity, but increased the specific activity of phosphonatase and phosphodiesterase in the AP soil. Additionally, the microbial community in NP soil revealed higher diversity index than the AP soil, but major changes in microbial groups were shown only when CH was applied. In vitro assay with native bacterial isolates confirmed their susceptibility to the commercial herbicide in both NP and AP soils. In conclusion, our results demonstrated changes on some processes related to soil C and P dynamics when pure glyphosate and a commercial glyphosate were applied, along with changes in microbial activity and community structure, being stronger the effects with the commercial formulation used. Further research should be done for test the effects of glyphosate on microbial stoichiometry and enzyme stoichiometry.

Residues of Reduced Herbicides Terbuthylazine, Ametryn, and Atrazine and Toxicology to Maize and the Environment through Salicylic Acid.

Terbuthylazine (TBA), ametryn (AME), and atrazine (ATZ) are triazine family herbicides. They are dominantly used in the field of cereal crops like wheat and maize for prevention of upland from annual gramineous and broad-leaved weeds, with attributes of weed efficiency broad spectrum and good market performance. Salicylic acid (SA) is a kind of natural plant growth regulator existing widely in the plant kingdom and participating in many physiological and defense processes. In this study, the effects of SA on the detoxification and degradation of herbicides TBA, AME, and ATZ in maize were investigated. When maize plants were exposed to 6 mg kg–1 of the triazine herbicides, the growth and chlorophyll concentration were reduced, while the membrane permeability increased. After maize was sprayed with 5 mg kg–1 SA, the herbicide-induced phytotoxicity was significantly assuaged, with the increased content of chlorophyll and decreased cellular damage in plants. Activities of several biomarker enzymes such as SOD, POD, and GST were repressed in the presence of SA. The concentration of the triazine herbicides in maize and the soil determined by high-performance liquid chromatography was drastically reduced by spraying SA. Using LC/Q-TOF-MS/MS, six metabolites and nine conjugates of AME in maize and soil were characterized. The relative contents of AME metabolites and conjugates in maize with SA were higher than those without SA. These results suggest that SA is able to promote the detoxification and decay of these triazine herbicides in maize and soil.

Adsorption and degradation behavior of six herbicides in different agricultural soils

This study focuses on the assessment of herbicide adsorption and degradation in three soils (Haplic Chernozem, Haplic Fluvisol, and Arenic Regozem) from different agricultural regions of the Czech Republic where sunflower is cultivated. Soil samples were used in laboratory batch adsorption and degradation experiments for six herbicides commonly used on sunflower crops. The findings are used to examine the effect of soil and herbicide properties on adsorption and degradation, as well as to determine the possible relationship between the two processes. The (Kf) sorption coefficient ranged from 1.07 to 135.37 cm3/nμg1−1/ng−1, and sorption increased in the following order: dimethenamid-p < pethoxamid < S-metolachlor < flurochloridone < aclonifen < pendimethalin. Adsorption of all six herbicides was positively correlated with soil organic matter content (p < 0.001), and cation exchange capacity (p < 0.001). pH was negatively correlated with the adsorption of all six compounds (p < 0.001). Degradation rates of herbicides ranged from 0. 012 to 0. 048 day−1, which corresponding to the half-lives (DT50) between 14 and 57 days, respectively. The highest half-life values were found in Haplic Fluvisol (a loam with higher organic matter content and lower pH). Results showed that both adsorption and degradation of herbicides are mainly controlled by soil organic matter. A negative relationship was found between the sorption coefficient and the rate of degradation. It can be concluded that the Freundlich sorption coefficient (Kf) can be a good predictor for the degradation of the studied herbicides.

Effect of Soil Type and Temperature on Persistence and Dissipation Kinetics of a New Readymix Formulation of Fomesafen + Quizalofop-ethyl.

The research portrays the fate of a new herbicide mixture of fomesafen and quizalofop-ethyl. The soil samples viz. red lateritic soil (A), coastal saline soil (B) and black soil (C) were fortified separately for fomesafen and quizalofop-ethyl at 0.5 (T1) and 1.0mg kg-1 (T2) doses and incubated at 20, 30 and 40°C. A satisfactory mean recovery, precision and linearity proved that the methods were accurate. Both the herbicides followed first + first order kinetics. Higher persistence of fomesafen was observed in Soil C than Soil B and Soil A with 22.38-53.75 days half-life, whereas quizalofop-ethyl showed higher stability in Soil A than Soils B and C with half-life of 0.93-12.07 days. Both compounds showed faster rates of dissipation at increased temperature, irrespective of soil type. The current study will help to predict the effect of temperature on the dissipation of herbicides in different soil under real field scenario.

Effects of Various Environmental Conditions on the Growth of Amaranthus patulus Bertol. and Changes of Herbicide Efficacy Caused by Increasing Temperatures

Understanding the effects of climate change on weed growth and herbicide activity is important for optimizing herbicide applications for effective weed control in the future. Therefore, this study examined how climate change affects the growth of Amaranthus patulus and the efficacy of soil and foliar herbicides at different temperatures. Although the control values for A. patulus differed between herbicides and temperature, the control values increased with increasing time after the herbicide treatments. Under growth conditions in which the temperature remained constant, the efficacy of soil-applied herbicides, ethalfluralin, metolachlor, linuron, and alachlor, on A. patulus was highest when the weeds were grown at high temperature. In particular, 100% control values of A. patulus were achieved in response to metolachlor treatments at the total recommended dosage in growth chambers at 35 °C. The efficacy of foliar herbicides, glufosinate-ammonium, bentazone, and mecoprop, on A. patulus was also highest when the plant was grown at high temperature, except for glyphosate isopropylamine, which had similar efficacy rates regardless of the temperature. A. patulus was 100% controlled in response to glufosinate-ammonium, bentazone, and mecoprop at the recommended dosages in growth chambers at 30 and 35 °C. Under growth conditions in which the temperature changed from day to night, the efficacy of soil-applied herbicides, alachlor and linuron, on A. patulus was highest when the weeds were grown at high temperature. On the other hand, the efficacy of the soil-applied herbicides metolachlor and linuron on A. patulus was similar regardless of the temperature. The efficacy of foliar herbicides, glyphosate isopropylamine, glufosinate-ammonium, bentazone, and mecoprop, on A. patulus was highest when the weeds were grown at high temperature. Although herbicide efficacy varied depending on whether the weeds were grown at constant or alternating temperatures, herbicide efficacy was generally highest when the temperature was high.

Effect of soil herbicides application in a fruit nursery on the growth and productivity of apple trees

Effect of soil herbicides application in a fruit nursery on the growth and productivity of apple trees

Comparison of sorption and solute transport behaviour of several herbicides in an alkaline agricultural soil

ABSTRACT 2,4-Dichlorophenoxyl acetic acid (2,4-D), atrazine, glyphosate, and metribuzine, have been used extensively as herbicides, which can lead to contamination of soil and groundwater. The objective of this study was to quantify and compare the sorption and solute transport of these commonly used herbicides in alkaline agricultural soil since there is little transport data for all these contaminants under comparable conditions and for the same soil, and there is also limited information for sorption of herbicides to alkaline soils. The amount of sorption as average distribution coefficient (Kd ) obtained from water saturated-soil-column tracer experiments varied between these herbicides, and included 0.01, 0.06, 0.44, and 2.14 L/kg for 2,4-D, metribuzine, atrazine, and glyphosate, respectively. These miscible-displacement, tracer experiments indicated linear and rate-limited sorption for all herbicides studied, and they also showed that the sorption amount, or Kd , for 2,4-D and metribuzine was low and comparable, whereas increased sorption Kd was observed for atrazine and glyphosate. Hydrophobic attraction to the soil organic fraction was the dominant mechanism for the non-ideal sorption, because Kd increased with Koc and herbicide pKa values were below the soil and water pH. Two-site sorption and transport modelling, including linear sorption and rate-limited sorption, matched all of the observed herbicide breakthrough curves. The sorption of 2,4-D and metribuzine onto alkaline agricultural soil was nearly negligible, which confirms increased contamination risk of groundwater resources. Whereas, atrazine and glyphosate exhibited significant sorption to the alkaline soil with decreased leaching risk compared to 2,4-D and metribuzine.

Evaluation of the efficacy and optimization of indigenous microbial isolate for herbicides (Paraquat Dichloride, Glyphosate, and Glyphosate isopropylamine) degradation

The presence of herbicides in soil is a serious problem for the environment. Studies on degradation of Herbicide (Paraquate dichloride (PD), Rake out (RO) and Gobara (GB)) by bacteria and fungi species isolated from soil environment in Keffi Metropolis Nigeria were carried out. A total of twenty (20) soil samples were collected. The bacteria and fungi were isolated from the soil and identified using standard microbiological methods. The herbicides utilization was determined using Atomic Adsorption Spectrometer. The effect of temperature on utilization of the herbicides by Enterobacter asburiae at 26OC ranges from 1.23±0.11 mg/ml for PD, 1.14±0.29 mg/ml for RO and 0.53±0.86mg/ml for GB, Pseudomonas aeruginosa utilization ranges from 1.45±0.17 mg/ml for PD, 1.17±0.35 mg/ml, for RO 1.12± 0.82mg/ml for GB. Aspergillus flavus ranges from 2.12±0.19 mg/ml for PD, 2.00±0.03 mg/ml for RO and 2.02±0.57 mg/ml for GB, Fusarium redolens were 2.19±0.26 mg/ml for PD, 2.15±0.08 mg/ml for RO and 1.92±0.16 mg/ml for GB. Effect of incubation time on microbial herbicides degradations: for E. asburiae on PD it ranges from day 1 with 0.24±0.37 mg/ml to day 20 with 2.06±0.11 mg/ml. for P. aeruginosa on PD ranges from day 1 with 0.38±0.08 mg/ml to day 20 with 2.39±1.45 mg/ml. The Utilization of herbicides by A. flavus on PD ranges from day 1 with 0.10±0.01 mg/ml to day 20 with 2.29±0.12 mg/ml. for F. redolens in PD, it ranges from day 1 with 0.27±0.08 mg/ml to day 20 with 2.57±0.27mg/ml. The process of degradation of herbicide has become very attractive as it allows for removal of herbicide over a relatively broad range of pH and temperature

Bioavailability and toxicity of imazethapyr in maize plant estimated by four chemical extraction techniques in different soils

The bioavailability and toxicity of herbicides on the crop depend on its uptake efficiency from the soil, and thus the assessment of the bioavailable fraction of herbicides in soil is a crucial work. In this study, we investigated the uptake concentration and toxicity of imazethapyr in maize plant using four chemical measurements, including the extraction of in situ pore water (CIPW), ex situ pore water (CEPW), organic solvent (Csoil) and passive sampling (Cfree) in five soils. The results obtained that the CIPW in a specific soil had the most significant correlation with the uptake concentration of imazethapyr in maize plant (R2 = 0.8851–0.9708), followed by CEPW (R2 = 0.8911–0.9565) and Cfree (R2 = 0.7881–0.9673). However, Cfree showed a higher correlation when considering all five soils, and thus Cfree can describe the bioavailability beyond the types of soil. Additionally, the median inhibition concentrations (IC50) of imazethapyr to maize plant ranged from 5.0 to 6.9 mg/kg in five soils, and the CIPW, CEPW and Cfree had better relationships with the IC50 (R2 > 0.8681) than the Csoil (R2 = 0.6782). The effects of soil properties on the phytotoxicity of imazethapyr, including pH, organic matter content, cation exchange capacity and clay content, were studied, and the soil pH was shown to be a main factor. This study demonstrated that the freely dissolved fraction and soil pore water concentration of imazethapyr in soil can be used to evaluate its bioavailability and toxicity to maize.

Urban Naturalization for Green Spaces Using Soil Tillage, Herbicide Application, Compost Amendment and Native Vegetation

Naturalization is a new and promising ecological approach to green space development for urban environments, although knowledge is sparse on techniques to implement it. We evaluated naturalization of eight native trees and shrubs, with site preparation (tillage, herbicide) and soil amendment (compost rates) treatment combinations at six sites in the city of Edmonton, Alberta, Canada. Soil texture improved with all compost rates, and acidity, electrical conductivity and total carbon increased, especially with 100% compost. Soil nutrients generally increased with compost then declined within a year. Plant species with highest potential for use in urban green spaces were Picea glauca, Symphoricarpos albus and Rosa acicularis. Herbicide was the most influential site preparation treatment, positively increasing survival and growth of planted woody species, while negatively lowering non-native species cover and increasing noxious weed cover. Soil amendment with compost influenced cover not species richness, with high compost amendment reducing vegetation cover across sites, and increasing individual plant size. This study suggests amendment of soil with compost and appropriate site preparation can positively influence naturalization of these woody species for urban green spaces.

The Impact of Cultivation Management and Weed Control Systems of Very Early Potato on Weed Infestation, Biodiversity, and Health Safety of Tubers.

The aim of the research was to determine the impact of potato cultivation management and weeding systems on weed infestation and to evaluate the possibility of using biomarkers to assess consumer exposure to herbicide residues in potato tubers. The experiment was carried out in 2016–2018 in Central-Eastern Poland. The subject of research was the very early variety Lord. The experiment was established using the randomized block method in a split-plot design. The first order factor was cultivation management: (A) traditional and (B) under polyethylene sheeting (PE-sheeting) put “on flat”. The second-order factors were weed control systems: (a) mechanical (b) to (d)-chemical. The study determined the degree of damage to crops and weeds, fresh and dry weight of weeds, their number and floristic composition, and herbicide residues in tubers and in the soil. The fresh and dry mass of weeds was most effectively limited by mechanical and chemical treatment with the use of a preparation containing linuron. Managing potato cultivation with PE-sheeting and soil herbicides has proven to be safe for very early potato production. Used for pre-emergence care, the preparation containing linuron did not leave even trace amounts of this active substance in the tubers. The determined amount of the active substance fluorochloridon and clomazone was lower than the Maximum Residue Level (MRL) norm in the EU (European Union). As a result, the adopted, innovative management and weeding control systems in the cultivation of early potato varieties can be considered safe for the consumer.

Dynamic Microwave-Assisted Micelle Extraction Coupled with Cloud Point Preconcentration for the Determination of Triazine Herbicides in Soil.

A green and simple method, dynamic microwave-assisted micelle extraction coupled with cloud point preconcentration, was developed for the determination of triazine herbicides in soil samples. The method has the advantages of those two extraction procedures, which could eliminate the interferences from complex soil samples greatly. Non-ionic surfactant Triton X-114 aqueous solution used as extraction solvent was continuously pumped into soil samples. The resulting extract was heated and centrifuged in the presence of NaCl. After centrifugation, the analytes were enriched into the surfactant-rich phase. No filtration or cleaning steps were required. Several key parameters were investigated. The Box-Behnken design was applied to optimize the experimental factors involved in the dynamic microwave-assisted micelle extraction. Good linearity was observed in the range of 1.00-250.00μgkg-1. The limits of detection were ranged between 0.26 and 1.71μgkg-1. The recoveries of analytes ranged from 80.3 to 98.3% with the relative standard deviations ranging from 1.1 to 6.6%.

Use of Slaughterhouse Sludge in the Bioremediation of an Oxyfluorfen-Polluted Soil

The use of organic matter is a highly accepted environmental practice among scientists for the bioremediation of polluted soils. In this manuscript we study under laboratory conditions the bioremediation capacity of a new biostimulant obtained from slaughterhouse sludge in a soil polluted by the oxyfluorfen at a rate of 4 l ha−1 (manufacturer’s rate recommended) over a 90-day period. We determined its effects on dehydrogenase, urease, β-glucosidase and phosphatase activities, the soil microbial community structure and the evolution of the herbicide in soil. Possibly due to the high content of low molecular weight proteins in the biostimulant, the enzymatic activities were stimulated mainly at the beginning of the experiment. Soil biological parameters were inhibited in oxyfluorfen-polluted soil. At the end of the experiment and compared with the control soil, dehydrogenase, urease, β-glucosidase, and phosphatase activities significantly decreased by 47.8%, 50.5%, 36.4%, and 45.5% in the oxyfluorfen-polluted soil. At 5 days into the experiment, the use of the biostimulant in oxyfluorfen-polluted soils decreased soil enzymatic activities and microbial community inhibition. At the end of the incubation period the oxyfluorfen concentration had decreased by 60% in the polluted soil and amended with biostimulants. These results suggested that the use of this biostimulant with higher amounts of low molecular weight proteins and peptides had a positive effect on the remediating oxyfluorfen-polluted soils. Therefore, this study provides the use of a new biostimulant obtained from slaughterhouse sludge by enzymatic hydrolysis processes used in the bioremediation of a soil polluted by the oxyfluorfen herbicide.

Influence of fertilizers and of the autumn tillage method on potato yield and phytopathologiс characteristics of tubers

The field experiment on identifying differences in the effect of the herbicide and foliar feeding of plants with liquid nitrogen fertilizer (UAN-32) against the background of autumn tillage with a cultivator or plow on potato yield and phytopathologic characteristics of tubers during storage was carried out in 2019-2020 in the Nizhny Novgorod region. The experiment was laid on sod-podzolic sandy loamy soil in production conditions on two varieties of potato ‒ the super-early Сolomba variety and the medium-early Innovator variety grown for seeds. The variants under study were surface application of the soil herbicide Gezagard in a tank mixture with UAN-32 and foliar feeding of plants with UAN-32 (N42) during the growing season against the background of N42P42K169 (calcium chloride in autumn + ammonium nitrate phosphate in spring). The results indicate that the background fertilization provides the yield of Colombа variety potato of 20.7-29.0 t/ha, the Innovator variety – 17.4-23.1 t/ha. The use of the herbicide is more effective during autumn tillage with a cultivator, providing an increase in yield of 28-37 % on both potato varieties, feeding of plants with UAN-32 contributes to an increase in yield (8-10 %) only on the Сolomba variety. Plowing the soil for potatoes helps to avoid the pest damage of tubers and to reduce their susceptibility to rhizoctonia by 6-27 %, to wet rot ‒ up to 55 %. In general, it has been established that due to autumn plowing with fertilization at a dose of N42P42K169, it is possible to obtain an increase in potato yield exceeding the increase provided both by herbicides and the use of foliar feeding of potatoes.