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Journal articles on the topic 'Weed-free'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Islam, Md Hafizul, Md Parvez Anwar, Md Rashedur Rahman, Md Sohanur Rahman, Fakhar Uddin Talukder, and Md Tipu Sultan. "INFLUENCE OF WEED INTERFERENCE PERIOD AND PLANTING SPACING ON THE WEED PRESSURE AND PERFORMANCE OF BORO RICE CV. BRRI DHAN29." Sustainability in Food and Agriculture 2, no. 1 (2020): 11–20. http://dx.doi.org/10.26480/sfna.01.2021.11.20.

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To study the influence of weed interference period and planting spacing on the weed pressure and performance of Boro rice cv. BRRI dhan29 an experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University from December 2015 to May 2016. The experiment comprised six weed interference periods (viz. weed free, weed free up to 20 DAT, weed free up to 40 DAT and weed free up to 60 DAT, weed free up to 80 DAT and weedy condition) and three spacing of planting (viz.25 cm × 15 cm, 25 cm × 10cm, 25 cm × 20 cm) following randomized complete block design with three replicati

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2

AKM, Harun-Or-Rashid. "Effect of different weed interference period on growth and yield performance of upland cotton varieties." International Journal of Natural and Social Sciences 12, no. 1 (2025): 18–31. https://doi.org/10.5281/zenodo.15062238.

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This study investigates the impact of weed interference periods on the growth and yield of cotton, emphasizing the critical weed control period (CPWC) for effective management strategies. Conducted over two growing seasons, the experiment utilized three cotton varieties (CB-15, CB-hybrid-1, and Rupali-1) under varying weed interference durations. Treatments included season-long weed-free conditions and periods of weed interference starting at different growth stages. Results indicated that all varieties exhibited the highest seed cotton yield in continuous weed-free conditions, with Rupali-1 a

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3

Bedmar, Francisco, Pablo Manetti, and Gloria Monterubbianesi. "Determination of the critical period of weed control in corn using a thermal basis." Pesquisa Agropecuária Brasileira 34, no. 2 (1999): 188–93. http://dx.doi.org/10.1590/s0100-204x1999000200006.

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Field studies were conducted over 3 years in southeast Buenos Aires, Argentina, to determine the critical period of weed control in maize (Zea mays L.). The treatments consisted of two different periods of weed interference, a critical weed-free period, and a critical time of weed removal. The Gompertz and logistic equations were fitted to relative yields representing the critical weed-free and the critical time of weed removal, respectively. Accumulated thermal units were used to describe each period of weed-free or weed removal. The critical weed-free period and the critical time of weed rem

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4

Jallow, S. A. F., and F. J. Manneh. "Response of Groundnut (Arachis hypogaea L.) Varieties to Critical Period of Crop-Weed Interference in West Coast Region of The Gambia." European Scientific Journal, ESJ 21, no. 12 (2025): 73. https://doi.org/10.19044/esj.2025.v21n12p73.

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Field trials were conducted in the 2021 rainy season at the National Agricultural Research Institute Banjulinding (NARI Site III) and the Teaching and Research Farm of the University of The Gambia (UTG Faraba Banta). The study aimed to determine the critical period of crop-weed interference on weed attributes, growth and yield of groundnut varieties. Hence, the objective was to determine a specific timeframe critical for weed management as well as growth and yield responses of the two groundnut varieties (Fleur 11 and Philippine pink) to weed competition. The experiment was conducted in a Rand

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5

Hackett, N. M., D. S. Murray, and D. L. Weeks. "Interference of Silverleaf Nightshade (Solanum elaeagnifolium) on Spanish Peanuts (Arachis hypogaea)1." Peanut Science 14, no. 1 (1987): 39–41. http://dx.doi.org/10.3146/i0095-3679-14-1-10.

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Abstract Interference of silverleaf nightshade (Solanum elaeagnifolium Cav.) with Pronto spanish peanuts (Arachis hypogaea L.) was evaluated from 1981 through 1983 in a natural occurring weed population. Treatments consisted of weed-free maintenance or weed interference for 0, 4, 8, 12 weeks and for the full season. Silverleaf nightshade stems were counted as a measure of weed regrowth in treatments maintained weed free for 0, 4, and 8 weeks. Contamination of the harvested in-shell peanuts by silverleaf nightshade berries was determined by counting the number of berries passing through the pea

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6

Bizualew, Zenebech, Getachew Mekonnen, and Getahun Alemayehu. "Determination of Critical Period of Weed-Crop Competition in Malt <i>Barley</i> (Hordeum <i>vulgare </i>L.) in North Showa Zone, Central Ethiopia." Journal of Plant Sciences 12, no. 6 (2024): 228–43. https://doi.org/10.11648/j.jps.20241206.17.

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Weeds are the principal limiting biological factor in national barley production, with losses that vary from region to region, depending on the cultivation system, predominant weed communities and weed control methods employed by the farmers. Therefore, field experiment was conducted under rain fed conditions in 2017 cropping season to determine the critical period of Weed-Crop Competition in malt barely (Hordeum vulgareL.) at Debre Birhan University in North Showa Zone, Central highlands of Ethiopia. A total of eighteen treatments were laid out in a randomized complete block design (RCBD) wit

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7

Qasem, Jamal R. "Competition of Weeds Dominated by Wild Oat (Avena sterilis) in Wheat (Triticum durum Desf.) in Jordan." Agronomy 11, no. 9 (2021): 1816. http://dx.doi.org/10.3390/agronomy11091816.

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Wheat is the main field crop grown in Jordan. Productivity is low due to different factors, including erratic rainfall, poor soil fertility and weed competition. A field experiment was carried out at the University of Jordan Research Station for two growing seasons to determine the effect of weed competition on growth and yield of wheat (Triticum durum Cv. “Hourani”). Treatments consisted of either allowing weeds to infest the crop or maintaining the crop weed-free for increasing durations after emergence. Results showed that, the longer the periods of weed competition, the greater the loss in

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8

Keeley, Paul E., and Robert J. Thullen. "Growth and Interaction of Johnsongrass (Sorghum halepense) with Cotton (Gossypium hirsutum)." Weed Science 37, no. 3 (1989): 339–44. http://dx.doi.org/10.1017/s0043174500072027.

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Several weed-free and johnsongrass competition periods were established and maintained in cotton to evaluate their influence on cotton yield and reproduction of johnsongrass. When johnsongrass was sprayed with fluazifop in field plots 3, 6, 9, or 12 weeks after cotton emergence, only plots sprayed at 3 weeks yielded as much cotton as weed-free plots. Johnsongrass permitted to compete for 6, 9, 12, and 25 weeks reduced cotton yields 20, 60, 80, and 90%, respectively. When johnsongrass was transplanted into weed-free plots 3, 6, 9, and 12 weeks after cotton emergence, a weed-free period of 9 wee

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9

Singh, Gurpreet, Hemraj Meena, Ramanjot Kaur, and Jayesh Garg. "Weed-Crop Competition and its Effect on the Productivity of Gobhi Sarson (Brassica napus L.)." Journal of Experimental Agriculture International 47, no. 7 (2025): 419–25. https://doi.org/10.9734/jeai/2025/v47i73582.

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Gobhi sarson suffer more from weed competition in early growth stage for light, water and nutrient including CO2. Heavy weed growth is a major recognized bottleneck in realizing the yield potential of Gobhi sarson. Weeds appear to be most serious menace in crop production due to their extensive losses. A field experiment was conducted during the Rabi season of session 2023-24 at the Agricultural Research Farm, School of Agricultural Sciences and Technology, RIMT University, Mandi Gobindgarh, Punjab. The experiment was laid out in Randomized Block Design (RBD) with eight treatments in three rep

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10

Buhler, Douglas D. "Weed population responses to weed control practices. II. Residual effects on weed populations, control, andGlycine maxyield." Weed Science 47, no. 4 (1999): 423–26. http://dx.doi.org/10.1017/s004317450009202x.

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Weed populations, weed control with imazethapyr, andGlycine maxyields were affected by a 4-yr history of different weed control practices. A range of chemical and mechanical practices were applied in separate field experiments initiated under high and low weed densities. In the high-density experiment, plots kept weed free for 4 yr averaged 24Setaria faberiplants m−2compared with 200 to 600 plants m−2with the various weed control treatments. In plots with a history of mechanical control, weeds not controlled by imazethapyr reducedG. maxyield by 340 kg ha−1compared with plots that were kept wee

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11

Laude, S. "Competitiveness of tomato (Lycopersicon esculentum Mill.) with weeds at various nitrogen doses and weed free periods." IOP Conference Series: Earth and Environmental Science 1253, no. 1 (2023): 012030. http://dx.doi.org/10.1088/1755-1315/1253/1/012030.

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Abstract The research objectives were to determine the effect of nitrogen dose and weed-free period on the competitiveness of tomato plants with weeds. The research used 6 x 4 Factorial Randomized Group Design. The first factor was the weed-free period (P) which consisted of six levels, namely weeds during tomato growth (P0), weed-free two weeks after planting (P1), weed-free four weeks after planting. (P2), weed-free six weeks after planting (P3), weed-free eight weeks after planting (P4), and weed free until harvest (P5). The second factor was the dose of nitrogen (N) consisting of 4 levels,

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12

Keeley, Paul E., and Robert J. Thullen. "Growth and Interaction of Bermudagrass (Cynodon dactylon) by Cotton (Gossypium hirsutum)." Weed Science 39, no. 4 (1991): 570–74. http://dx.doi.org/10.1017/s0043174500088391.

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Several weed-free and bermudagrass competition periods were established and maintained in cotton to evaluate their influence on cotton yields and reproduction of bermudagrass. Cotton sprayed with fluazifop for bermudagrass control 4 or 8 weeks after emergence yielded 93 and 90% as much as weed-free cotton. This compared to losses of 16 and 26% when bermudagrass was permitted to compete with cotton for 12 and 25 weeks, respectively. Cotton handweeded for 8 to 12 weeks yielded the same as weed-free cotton and 9% more than cotton weed free for only 4 weeks. Bermudagrass seed production was preven

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13

A.Y, Mamudu,, and Adeyemi, M. "CRITICAL PERIOD OF WEED INTERFERENCE ON SOYBEAN (GLYCINE MAX (L) MERRILL)." Reviews In Food and Agriculture 3, no. 2 (2022): 76–79. http://dx.doi.org/10.26480/rfna.02.2022.76.79.

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Weeds are one of the important factors affecting agriculture production, weeds and inadequate weed control and management pose a detrimental factor affecting crop production. The experiment was conducted at the Teaching and Research Farm of Federal University Technology, Minna, Nigeria, to determine the effectiveness of different weeding regime and critical period of weed interference in the growth and yield of soyabean. The treatments were laid out in a Randomized Complete Block Design (RCBD) and replicated three times. There are ten treatments consisting of weed infested and weed-free as fol

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14

Keeley, Paul E., and Robert J. Thullen. "Growth and Interaction of Barnyardgrass (Echinochloa crus-galli) with Cotton (Gossypium hirsutum)." Weed Science 39, no. 3 (1991): 369–75. http://dx.doi.org/10.1017/s0043174500073082.

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Several weed-free and barnyardgrass competition periods were established and maintained in cotton in field plots to evaluate their influence on cotton yield and seed production of barnyardgrass. When barnyardgrass was sprayed with fluazifop 3, 6, 9, or 12 weeks after cotton emergence, only plots sprayed at 3 weeks yielded as much cotton as plots kept weed free. Barnyardgrass permitted to compete for 6, 9, 12, and 25 weeks reduced cotton yields an average of 21, 59, 90, and 97%, respectively. When barnyardgrass was seeded into weed-free plots at 3, 6, 9, and 12 weeks after cotton emergence, a w

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15

Bretas, Igor L., Jose C. B. Dubeux, Priscila J. R. Cruz, et al. "Monitoring the Effect of Weed Encroachment on Cattle Behavior in Grazing Systems Using GPS Tracking Collars." Animals 13, no. 21 (2023): 3353. http://dx.doi.org/10.3390/ani13213353.

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Weed encroachment on grasslands can negatively affect herbage allowance and animal behavior, impacting livestock production. We used low-cost GPS collars fitted to twenty-four Angus crossbred steers to evaluate the effects of different levels of weed encroachment on animal activities and spatial distribution. The experiment was established with a randomized complete block design, with three treatments and four blocks. The treatments were paddocks free of weeds (weed-free), paddocks with weeds established in alternated strips (weed-strips), and paddocks with weeds spread throughout the entire a

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16

Abdul Hamid, Syahrudin, Ruben Tinting Sirenden, Fitra Galih Prasetyo, et al. "PERIODE KRITIS TANAMAN MENTIMUN (Cucumis sativus L.) TERHADAP PERSAINGAN GULMA PADA TANAH SPODOSOL." AgriPeat 26, no. 01 (2025): 1–7. https://doi.org/10.36873/agp.v26i01.19013.

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This study aims to determine the critical period for cucumber (Cucumis sativus L.) plant against weed compettition in spodosol soil.The research was carried out on Jalan Merdeka, Jekan Raya District, Palangka Raya City, Central Kalimantan Province. The research was carried out in April-July 2024. This study used a Randomized Block Design (RAK) with treatment G1: Weed Free 10 DAP, G2: Weed Free 20 DAP, G3: Weed Free 30 DAF, G4: Weed Free Forever, G5: Weed 10 DAP, G6: Weed 20 DAP, G7: Weed 30 DAP and G8: Weed Forever. The results showed that weeding time for cucumber plants had a significant eff

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17

M, RAMASAMY, SRINIVASAN K, and VAIRAVAN K. "WEED MANAGEMENT IN PIGEONPEA-GROUNDNUT INTERCROPPING SYSTEM." Madras Agricultural Journal 83, May (1996): 298–300. http://dx.doi.org/10.29321/maj.10.a01028.

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Field experiments were conducted for three years, to study the effect of different weed mangement practices in pigeonpea + groundnut intercropping system. The study revealed that the first 30 days after sowing is the critical period of weed management for pigeonpea + groundnut system. Weed free environment upto 30 days after sowing produced significantly higher yield which was on par with weed free upto 45, 60 days and weed free till maturity. Similar trend was observed for both the main and intercrops

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18

Arslan, Zubeyde Filiz, Martin M. Williams, Roger Becker, Vincent A. Fritz, R. Ed Peachey, and Tom L. Rabaey. "Alternatives to Atrazine for Weed Management in Processing Sweet Corn." Weed Science 64, no. 3 (2016): 531–39. http://dx.doi.org/10.1614/ws-d-16-00001.1.

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Atrazine has been the most widely used herbicide in North American processing sweet corn for decades; however, increased restrictions in recent years have reduced or eliminated atrazine use in certain production areas. The objective of this study was to identify the best stakeholder-derived weed management alternatives to atrazine in processing sweet corn. In field trials throughout the major production areas of processing sweet corn, including three states over 4 yr, 12 atrazine-free weed management treatments were compared to three standard atrazine-containing treatments and a weed-free chec

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19

Devkota, Manjul, Rijwan Sai, Aavash Shrestha, Shiva Chaudhary, Prajjwal Koirala, and Mohan Mahato. "Weed Management Effects on Weed Dynamics, Yield and Economics of Spring Maize at Dang, Nepal." Turkish Journal of Agriculture - Food Science and Technology 12, s1 (2024): 1997–2008. https://doi.org/10.24925/turjaf.v12is1.1997-2008.6865.

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Weeds pose a significant challenge in maize fields in the Dang district, leading to a substantial 52% reduction in yield. Hence, this study was conducted in Satbariya village of Dang, Nepal, in 2023 to evaluate the impact of various weed management practices on weed dynamics, growth, and yield of spring maize. The experiment included seven treatments: a weedy check, weed-free plot, pre-emergence application of atrazine at 1.25 a.i. kg/ha (AtPrE), post-emergence application of atrazine at 1.25 a.i. kg/ha (AtPoE), manual weeding at 30 DAS, mini-tiller at 30 DAS, and LaPoE (tembotrione 42% SC + a

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20

Rahman, Md Ohidur, Uttam Kumer Sarker, Ridwan Ahmed Rahat, et al. "Effect of Reduced Rate of Post Emergence Herbicide with Aqueous Extracts of Lentil Crop Residues on Weed Management Indices and Yield of Transplanted Aman Rice." Journal of the Bangladesh Agricultural University 23, no. 2 (2025): 113–28. https://doi.org/10.3329/jbau.v23i2.82579.

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An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, from July to December 2023, to assess the effectiveness of integrating reduced doses of post-emergence herbicides with aqueous extracts of lentil crop residues on weed management indices and the yield of T. aman rice. The experimental design included two factors: rice variety (BRRI dhan49, BRRI dhan87, and Binadhan-7) and herbicide treatments combined with aqueous extracts of lentil residues (control, recommended dose of herbicide, various reduced herbicide doses plus extracts, and wee

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21

Thesiya, N. M., H. P. Dholariya, J. V. Varsani, and H. M. Virdia. "Evaluation of Critical Period of Crop Weed Competition for Enhanced Weed Management and Yield of Summer Pearl Millet." International Journal of Plant & Soil Science 36, no. 10 (2024): 239–47. http://dx.doi.org/10.9734/ijpss/2024/v36i105071.

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The field experiment was conducted at Instructional farm of Department of Agronomy, Navsari Agriculture University, Navsari during summer season of 2021 to 2023 to study critical crop-weed competition in summer pearl millet. There were 10 treatments comprising of initial weed free periods of 10, 20, 30 and 40 days after sowing (DAS) and weedy 10, 20, 30 and 40 DAS along with weedy till harvest (un-weeded check) and weed free till harvest (weed free check), were replicated thrice in the randomized block design. Results revealed that maintaining a weed-free condition from 20 to 40 DAS significan

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22

Keller, Martina, Geoffroy Gantoli, Jens Möhring, Christoph Gutjahr, Roland Gerhards, and Victor Rueda-Ayala. "Integrating Economics in the Critical Period for Weed Control Concept in Corn." Weed Science 62, no. 4 (2014): 608–18. http://dx.doi.org/10.1614/ws-d-13-00184.1.

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The effect of weed interference on corn yield and the critical period for weed control (CPWC) were determined in Germany and Benin. Treatments with weed control starting at different crop growth stages and continuously kept weed-free until harvest represented the “weed-infested interval.” Treatments that were kept weed-free from sowing until different crop growth stages represented the “weed-free interval.” Michaelis–Menten, Gompertz, logistic and log–logistic models were employed to model the weed interference on yield. Cross-validation revealed that the log–logistic model fitted the weed-inf

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23

Bajwa, Ali A., Ahmad Nawaz, Muhammad Farooq, Bhagirath S. Chauhan, and Steve Adkins. "Parthenium weed (Parthenium hysterophorus) competition with grain sorghum under arid conditions." Experimental Agriculture 56, no. 3 (2020): 387–96. http://dx.doi.org/10.1017/s0014479720000034.

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AbstractParthenium weed is an invasive species in a growing number of countries where it infests numerous crop fields, including sorghum. Two field studies were conducted to quantify the effect of parthenium weed on the performance of grain sorghum at different weed densities (0, 5, 10, 15 and 20 plants m−2) and durations of weed-crop competition (season-long weed-free, weed-free after 2, 4, 6 or 8 weeks, and season-long weedy). Our aim was to identify the density threshold and ideal duration to control parthenium weed in sorghum fields. Both field experiments were planned in a randomised comp

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Kumar, Guglawath Ashwin, R. K. Shukla, P. K. Keshry, Sourav Ghosh, and Mahek Chhabra. "To Study the Effect of Integrated Weed Management Practices on Weeds Parameters of Transplanted Rice in Chhattisgarh Plains." International Journal of Plant & Soil Science 35, no. 21 (2023): 336–42. http://dx.doi.org/10.9734/ijpss/2023/v35i213982.

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The present experiment entitled “To study the effect of integrated weed management practices on weeds parameters of transplanted rice in Chhattisgarh plains” was studied during the 2022, kharif season at Agricultural Research Farm BTC, CARS, Bilaspur, Chhattisgarh. A randomized block design with ten treatments and three replications was used. Treatment T5 (untreated control) had the highest weed density and dry weight measurements, whereas treatment T6 (weed-free) had the lowest.The weed index was lowest in T6 (weed-free). The stage with the highest percentage of weed control efficiency was T6

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Soltani, Nader, Robert E. Nurse, Amit J. Jhala, and Peter H. Sikkema. "The critical weed-free period in glyphosate-resistant soybean in Ontario is similar to previous estimates using glyphosate-susceptible soybean." Canadian Journal of Plant Science 99, no. 4 (2019): 437–43. http://dx.doi.org/10.1139/cjps-2018-0049.

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A study consisting of 13 field experiments was conducted during 2014–2016 in southwestern Ontario and southcentral Nebraska (Clay Center) to determine the effect of late-emerging weeds on the yield of glyphosate-resistant soybean. Soybean was maintained weed-free with glyphosate (900 g ae ha−1) up to the VC (cotyledon), V1 (first trifoliate), V2 (second trifoliate), V3 (third trifoliate), V4 (fourth trifoliate), and R1 (beginning of flowering) growth stages, after which weeds were allowed to naturally infest the soybean plots. The total weed density was reduced to 24%, 63%, 67%, 72%, 76%, and

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Chang, Jiyul, Sharon A. Clay, David E. Clay, and Kevin Dalsted. "Detecting weed-free and weed-infested areas of a soybean field using near-infrared spectral data." Weed Science 52, no. 4 (2004): 642–48. http://dx.doi.org/10.1614/ws-03-074r1.

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Weed distribution maps can be developed from remotely sensed reflectance data if collected at appropriate times during the growing season. The research objectives were to determine if and when reflectance could be used to distinguish between weed-free and weed-infested (mixed species) areas in soybean and to determine the most useful wavebands to separate crop, weed, and soil reflectance differences. Treatments included no vegetation (bare soil), weed-free soybean, and weed-infested soybean and, in 1 yr, 80% corn residue cover. Reflectance was measured at several sampling times from May throug

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Abbas, Rana Nadeem, Asif Iqbal, Muhammad Aamir Iqbal, et al. "Weed-Free Durations and Fertilization Regimes Boost Nutrient Uptake and Paddy Yield of Direct-Seeded Fine Rice (Oryza sativa L.)." Agronomy 11, no. 12 (2021): 2448. http://dx.doi.org/10.3390/agronomy11122448.

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Under the changing climate, fertilization regimes and weed infestation management in aromatic direct-seeded fine rice (DSR) remain vital for curbing environmental hazards and ensuring food security. A multi-year field study was undertaken to appraise the influence of fertilization techniques and weed-free periods on weed dynamics, nutrient uptake and paddy yield in a semi-arid environment. Treatments included two fertilization methods (broadcasting and side placement) and five weed-free durations (20, 30, 40, 50 post-seeding days, DAS) along with a weed-free crop for a whole season. Weed compe

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Colquhoun, Jed B., Christopher M. Konieczka, and Richard A. Rittmeyer. "Ability of Potato Cultivars to Tolerate and Suppress Weeds." Weed Technology 23, no. 2 (2009): 287–91. http://dx.doi.org/10.1614/wt-08-062.1.

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Potato producers rely heavily on herbicides for the majority of weed control. However, recent occurrences of herbicide-resistant weed populations and the lack of new herbicide registrations have stimulated interest in alternative strategies. The choice of potato cultivars that can suppress or tolerate weed competition could be a component of an integrated weed management system to reduce reliance on herbicides. The competitive ability of 10 potato cultivars—‘Atlantic’, ‘Bannock Russet’, ‘Dark Red Norland’, ‘Goldrush’, ‘Rodeo’, ‘Russet Burbank’, ‘Russet Norkotah’, ‘Snowden’, ‘Superior’, and ‘Vi

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Arif, Naymur Rahman, Ridwan Ahmed Rahat, Mansura Khatun, et al. "Impact of reduced rate of pre-emergence herbicide with aqueous extract of mustard crop residues on different weed management indices and yield of transplanted aman rice." Archives of Agriculture and Environmental Science 10, no. 1 (2025): 103–12. https://doi.org/10.26832/24566632.2025.1001015.

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Effective weed management with herbicides and crop extracts boosts rice yield and growth. In this respect, a field experiment was conducted from July to December 2023 at the Agronomy Field Laboratory (AFL), Bangladesh Agricultural University (BAU), Mymensingh, to evaluate the effect of mustard crop residue extract combined with reduced herbicide doses on the yield and attributes of T. aman rice. The study involved three rice varieties BRRIdhan49, BRRI dhan87, and Binadhan-7 and seven treatments: no weeding (control), recommended dose of herbicide at pre-emergence (RDHP), mustard crop extract (

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30

Mishra, Hariom, Ankur Tripathi, Bhayankar, Ram Pratap Pal, and Ravi Shanker Singh. "Effect of Fertility Levels and Weed Management Practices on Weed Species and Weed Dry Matter Accumulation." International Journal of Plant & Soil Science 35, no. 16 (2023): 342–51. http://dx.doi.org/10.9734/ijpss/2023/v35i163160.

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The present investigation was conducted at Agronomy Research Farm, Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya (U.P.) during Rabi season of 2019-20. The experiment was laid out in Factorial Randomized block design with three replications keeping four fertility levels viz., 100% RDF-IF (150 kg/h), 125% RDF-IF (25% through FYM), 100% RDF + 25%RDN through FYM, 75%RDF-IF+25%RDN through FYM and four weed management practices Weedy Check, Weed free up to 60 days, Sulfosulfuron @ 30 g/h + Carfentazole @ 20 g/h, Clodinafoppropagynol(60 g) + metsulfuron(4 g)=(64 g

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Bogale, Ayana. "Determining Critical Weed Competition at Different Weed Free Periods in Linseed in Holeta District Central Ethiopia." International Journal of Agricultural Science and Food Technology 10, no. 3 (2024): 101–6. http://dx.doi.org/10.17352/2455-815x.000213.

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A substantial proportion of linseed yield is lost due to weeds in the Holeta area of Central Ethiopia. The weeds infest the crop fields during the early growth stage and consume growth resources. To protect the crops from weeds, farmers manage their fields using cultural practices. However, there is a knowledge gap between farmers on critical weed removal time for the management of the weeds from the crop. Therefore, it is assumed that determining the weed-free period after the sowing of linseed to control the weeds is necessary. The experiment was designed to determine the suitable weed-free

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Swanton, Clarence J., John O'Sullivan, and Darren E. Robinson. "The Critical Weed-Free Period in Carrot." Weed Science 58, no. 3 (2010): 229–33. http://dx.doi.org/10.1614/ws-09-098.1.

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Seeding date and the duration of weed emergence influenced the duration of the critical weed-free period in carrot. The critical weed-free period extended up to 930 growing degree days (GDD), when carrot was seeded in late April. In contrast, the critical weed-free period was short and lasted 414 to 444 GDD, when seeded in mid to late May and weed biomass was less than 650 g m−2. It is important for growers to scout fields for weeds until 930 GDD to protect the yield potential of the carrot crop in earlier planted crops; however, for carrot planted in mid to late May, weeds emerging after 444

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Anwar, M. P., A. S. Juraimi, B. Samedani, A. Puteh, and A. Man. "Critical Period of Weed Control in Aerobic Rice." Scientific World Journal 2012 (2012): 1–10. http://dx.doi.org/10.1100/2012/603043.

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Critical period of weed control is the foundation of integrated weed management and, hence, can be considered the first step to design weed control strategy. To determine critical period of weed control of aerobic rice, field trials were conducted during 2010/2011 at Universiti Putra Malaysia. A quantitative series of treatments comprising two components, (a) increasing duration of weed interference and (b) increasing length of weed-free period, were imposed. Critical period was determined through Logistic and Gompertz equations. Critical period varied between seasons; in main season, it start

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Komal, Mohd Shah Alam, Jay Nath Patel, Yograj, and Ravinder. "Investigating the Effectiveness of Various Weed Control Methods to Reduce Narrow and Broad Leaf Populations in the Oat (Avena sativa L.) Crop." Journal of Experimental Agriculture International 46, no. 7 (2024): 655–66. http://dx.doi.org/10.9734/jeai/2024/v46i72619.

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Aims: It is aim to investigating the effectiveness of various weed control methods to reduce narrow and broad leaf populations in oat (Avena sativa L.) crop. Study Design: The experiment was designed using a Randomized Block design method. Place and Duration of Study: Department of agronomy, School of Agriculture, Abhilashi university, Chail Chowk, Mandi, India (H.P.) during the Rabi season of 2022. Methodology: The field trail was conducted with seven treatments and replicated thrice. The investigation included seven different weed control techniques i.e. T1 - weedy check (control), T2 - weed

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Miller, Alan B., and Herbert J. Hopen. "Critical Weed-Control Period in Seeded Cabbage (Brassica oleraceavarcapitata)." Weed Technology 5, no. 4 (1991): 852–57. http://dx.doi.org/10.1017/s0890037x00033972.

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The critical weed-control period in field seeded cabbage using natural weed stands was 2 wk in 1988 and 4 wk in 1989. Regression analysis showed that the length of weed-free period, weed density, and ambient light reduction by competing weeds were factors affecting cabbage yield. Weeds that emerged after the initial weed-free period shaded the soil and subsequently lowered soil surface temperatures in 1989. Velvetleaf densities of 1.2 and 3.6 plants per m2that competed all season with cabbage reduced cabbage yields 52% and 71% of the weed-free treatment in 1988 and 76% and 92% in 1989, respect

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Singh, Sudhakar, Deepak Pandey, S. S. Chanda, et al. "Integrated Weed Management in Transplanted Rice (Oryza sativa L.): An Experimental Investigation." International Journal of Plant & Soil Science 35, no. 23 (2023): 166–74. http://dx.doi.org/10.9734/ijpss/2023/v35i234228.

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An experiment entitled Integrated Weed Management in transplanted rice (Oryza sativa L.)” was conducted at Shradhay Bhagwati Singh Agriculture Research Farm, Hajipur, Chandra Bhanu Gupta Post Graduate College, B.K.T., LUCKNOW (U.P.) during Kharif season of 2022-2023. The treatment comprised of 9 weed management practices. Weedy check till maturity, Weed free upto 60 DAT, Pretilachlor 50 % EC @ 1.25 kg a.i/ha (PE), Pendimethaline 30 % EC @1.0 kg a.i/ha (PE), Pendimethaline 30 % EC @ 1.0 kg a.i/ha + 1 hand weeding at 30DAT, Pendimethaline 30 % EC @1.0 kg a.i/ha (PE) + Bispyribac Sodium 10 % SC @

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MASOUMEH YOUNESABADI, T.K. DAS, and A.R. SHARMA. "Effect of tillage and tank-mix herbicide application on weed management in soybean (Glycine max)." Indian Journal of Agronomy 58, no. 3 (2001): 372–78. http://dx.doi.org/10.59797/ija.v58i3.4203.

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A field experiment was carried out at the Indian Agricultural Research Institute during 2010 and 2011 to investi- gate the effect of tillage and tank-mix herbicide application on growth, yield, nutrient uptake and protein content of soybean [Glycine max (L.) Merrill]. It was observed that conventional (CT) and no (NT) tillage systems resulted in comparable weed density and dry weight and soybean seed yield during both years except 2010, when NT re- sulted in significantly lower weed density. Tank-mix pre-emergence application of pendimethalin 0.5 kg/ha + imazethapyr 0.075 kg/ha was next to wee

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Bussan, Alvin J., Orvin C. Burnside, James H. Orf, Eric A. Ristau, and Klaus J. Puettmann. "Field evaluation of soybean (Glycine max) genotypes for weed competitiveness." Weed Science 45, no. 1 (1997): 31–37. http://dx.doi.org/10.1017/s0043174500092444.

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In the first of 2 field studies, weed biomass and soybean seed yield were used to evaluate 16 soybean genotypes for competitive ability against 12 weed species at Rosemount, MN, in 1992 and 1993. The yield and ranking of soybean genotypes often varied with the weed species. Grass weed species reduced yields the most, and small-seeded broadleaf weeds reduced yields the least across years. ‘Parker’ was highly competitive, as it suppressed weed biomass and produced high soybean yield. ‘Kato,’ ‘Kasota,’ ‘Dawson,’ and ‘Glenwood’ minimized weed biomass and maintained soybean yield while in competiti

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Place, G. T., S. C. Reberg-Horton, D. L. Jordan, T. G. Isleib, and G. G. Wilkerson. "Influence of Virginia Market Type Genotype on Peanut Response to Weed Interference." Peanut Science 39, no. 1 (2012): 22–29. http://dx.doi.org/10.3146/ps10-12.1.

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Abstract Differences in the ability of cultivars to compete with weeds are not well-defined for peanut. Research was conducted in 2007 and 2008 to compare the growth and competitiveness of the virginia market type cultivars NC 10C, NC-V 11, NC 12C, Phillips, VA 98R, and breeding lines N99027L, N01013T, and N02020J under weedy and weed-free conditions. Weed-free peanut was established by applying preemergence and postemergence herbicides throughout the growing season supplemented by weekly hand removal of weeds. Clethodim was applied to weedy peanut to eliminate annual grass interference but no

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Dubeux, José C. B., Igor Brêtas, Luana Queiroz, et al. "PSXIII-6 Weed encroachment reduces soil organic carbon stock in bermudagrass pastures." Journal of Animal Science 102, Supplement_3 (2024): 613–14. http://dx.doi.org/10.1093/jas/skae234.689.

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Abstract Weed encroachment might reduce stocking rate and overall animal performance in grazing systems. In addition, weeds can affect soil organic carbon because of changes in primary productivity and belowground biomass compared with well managed pastures. This study assessed different levels of spiny pigweed (Amaranthus spinosus L.) encroachment on bermudagrass [Cynodon dactylon (L.) Pers.] pastures. Spiny pigweed was drilled onto bermudagrass pastures to create three levels of encroachment: weed free, medium encroachment, and high encroachment. The weed-free pastures were treated with herb

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MacRae, Andrew W., Wayne E. Mitchem, David W. Monks, Michael L. Parker, and Roger K. Galloway. "Tree Growth, Fruit Size, and Yield Response of Mature Peach to Weed-Free Intervals." Weed Technology 21, no. 1 (2007): 102–5. http://dx.doi.org/10.1614/wt-06-002.1.

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An experiment was conducted at one location in 1999 and two locations in 2000 to determine the critical weed-free period for peach in North Carolina. The cultivars for the three locations were ‘Contender’, ‘Norman’, and ‘Summerprince’. Weed-free intervals of 0, 3, 6, 9, 12, and 15 wk after peach tree bloom were established. Paraquat at 1.1 kg ai/ha plus nonionic surfactant at 0.25% v/v was applied every 10 d, after treatments were initiated at peach bloom, to maintain weed-free plots. Large crabgrass, hairy vetch, and smooth crabgrass were the primary weeds in Contender. Horseweed, smooth crab

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Hussain, Mubshar, Muhammad Haider Abbas, Abdul Majeed, Waqas Ahmed Minhas, Shahid Farooq, and Khawar Jabran. "The Influence of Different Row Spacing and Weed Control Intervals on Weed Infestation and Yield-Related Traits of American (Gossypium hirsutum L.) and Desi (Gossypium arboreum) Cotton." Sustainability 14, no. 16 (2022): 9867. http://dx.doi.org/10.3390/su14169867.

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Narrow row spacing has attracted significant attention due to its beneficial impacts on weed management in cotton. This study compared the effects of normal and ultra-narrow row spacing on critical periods of weed control in American (Gossypium hirsutum L.) and ‘Desi’ (Gossypium arboreum) cotton. Two different row spacings (i.e., recommended (75 cm) and ultra-narrow (30 cm)) and three weed control intervals (i.e., weed control at 30, 60 and 90 days after sowing (DAS)) were included in the study. Weedy-check and weed-free treatments were included in the experiment as controls for comparison. ‘D

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Anderson, Randy L. "Possible Causes of Dry Pea Synergy to Corn." Weed Technology 26, no. 3 (2012): 438–42. http://dx.doi.org/10.1614/wt-d-12-00001.1.

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Dry pea improves corn yield and tolerance to weed interference compared with soybean, spring wheat, or canola as preceding crops. To understand this synergy between dry pea and corn, growth and nutrient concentration of corn were examined following dry pea or soybean in sequence. Each corn plot was split into weed-free and weed-infested subplots, with foxtail millet established at one density to provide uniform weed interference. Compared with soybean, dry pea improved corn grain yield 10% in weed-free conditions and corn tolerance to weed interference more than twofold. Dry pea synergy to cor

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YADAV, S. K., S. S. LAL, A. K. SRIVASTAVA, T. K. BAG, and B. P. SINGH. "Efficacy of chemical and non-chemical methods of weed management in rainfed potato (Solanum tuberosum)." Indian Journal of Agricultural Sciences 85, no. 3 (2015): 382–86. http://dx.doi.org/10.56093/ijas.v85i3.47160.

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A field experiment was conducted during two consecutive summer season of 2011 and 2012 at Central Potato Research Station, Shillong to evaluate comparative efficacy of chemical and non-chemical methods of weed management in rainfed potato (Solanum tuberosum L.) cultivation of Meghalaya. Maximum reduction in crop yield due to presence of weed by 34.4% and 37.2% during first year and second year, respectively was found under weedy check plot followed by farmers' practices compared to weed free treatment. Application of metribuzin @ 1.0 kg ai/ha as pre emergence caused the highest reduction in to

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Van Acker, Rene C., Clarence J. Swanton, and Stephan F. Weise. "The Critical Period of Weed Control in Soybean [Glycine max(L.) Merr.]." Weed Science 41, no. 2 (1993): 194–200. http://dx.doi.org/10.1017/s0043174500076050.

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Field studies were conducted at three locations over 2 yr in southern Ontario to determine the critical period of weed control in soybean. This period generally consisted of two discrete periods, a critical weed-free period and a critical time of weed removal. The critical weed-free period was relatively short in duration and consistent across locations and years. A period of weed control lasting up to the fourth node growth stage (V4), approximately 30 days after emergence (DAE), was adequate to prevent a yield loss of more than 2.5%. The critical time of weed removal was variable across loca

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Koger, Clifford H., David R. Shaw, Krishna N. Reddy, and Lori M. Bruce. "Detection of pitted morningglory (Ipomoea lacunosa) with hyperspectral remote sensing. II. Effects of vegetation ground cover and reflectance properties." Weed Science 52, no. 2 (2004): 230–35. http://dx.doi.org/10.1614/ws-03-083r1.

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Field research was conducted to determine the potential of hyperspectral remote sensing for discriminating plots of soybean intermixed with pitted morningglory and weed-free soybean with similar and different proportions of vegetation ground cover. Hyperspectral data were collected using a handheld spectroradiometer when pitted morningglory was in the cotyledon to two-leaf, two- to four-leaf, and four- to six-leaf growth stages. Synthesized reflectance measurements containing equal and unequal proportions of reflectance from vegetation were obtained, and seven 50-nm spectral bands (one ultravi

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Adigun, Joseph, A. O. Osipitan, Segun Toyosi Lagoke, Raphael Olusegun Adeyemi, and Stephen Olaoluwa Afolami. "Growth and Yield Performance of Cowpea (Vigna Unguiculata (L.) Walp) as influenced by Row-Spacing and Period of Weed interference in South-West Nigeria." Journal of Agricultural Science 6, no. 4 (2014): 188. http://dx.doi.org/10.5539/jas.v6n4p188.

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Weed problem appears to be the most deleterious factor causing between 25 and 60% reduction in potential yield of cowpea. Field trials were therefore conducted to study the effect of inter-row spacing and period of weed interference on growth and yield of cowpea (Vigna unguiculata (L) Walp) at the Teaching and Research Farm of the Federal University of Agriculture, Abeokuta (07° 15'; 03° 25' E) in South Western Nigeria during the early and late wet seasons of 2009. The experiment consisted of eight main plots of weed interference which included initial weed removal for 3, 6, 9, and 12 weeks af

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Thakur, Nishant, Sandeep Kumar, and Ravinder Kumar. "Effect of Different Weed Management Practices on Growth and Yield of Cabbage (Brassica oleracea var. capitata L.)." International Journal of Plant & Soil Science 35, no. 19 (2023): 348–52. http://dx.doi.org/10.9734/ijpss/2023/v35i193561.

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As cabbage is cultivated with wide spacing, it is prone to profuse weed infestations, resulting in reduced crop yields and subsequent significant economic losses. A field experiment comparing different weed management treatments namely T1 (two hand weedings), T2 (paddy straw mulch), T3 (pre-emergent application of oxyfluorfen @ 1 kg a.i./ha), T4 (PE application of pendimethalin @ 1.5 kg a.i./ha), T5 (PE application of pendimethalin @ 1 kg a.i./ha + HW at 35 days after transplanting), T6 (PE application of oxyfluorfen @ 1 kg a.i./ha + HW at 35 DAT), T7 (weed-free) and T8 (weedy check) was condu

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Miah, Md Abdus Salam, Mouli Mondal, Shivanand Jha, Shubroto Kumar Sarkar, Ahmed Khairul Hasan, and Swapan Kumar Paul. "Response of sulphur fertilization and weed management to performance of faba bean (Vicia faba L.)." Research in Agriculture Livestock and Fisheries 10, no. 1 (2023): 33–42. http://dx.doi.org/10.3329/ralf.v10i1.66217.

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The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh from November 2021 to April 2022 to assess the effect of sulphur fertilization and weed management on yield performance of faba bean. The experiment consisted of three levels of sulphur viz. 0, 20 and 40 kg S ha-1 and four levels of weed management practices viz. control (weedy check), weed-free up to 30 days after sowing (DAS), weed-free up to 60 DAS, weed-free throughout the growth period. The experiment was laid out in a randomized complete block design with three replications. The

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S.M, Kondap, Rao A.R, and Venkateswara Reddy G. "STUDIES ON THE EFFECT OF PLANTING PATTERNS AND WEEDING INTERVALS IN SORGHUM BASED INTERCROPPING SYSTEM ON WEED INFESTATION AND YIELD." Madras Agricultural Journal 77, February (1990): 64–69. http://dx.doi.org/10.29321/maj.10.a01918.

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The Influence of management practices like intercropping, planting patterns and weeding Intervals on weed infestation and grain yield of sorghum were studied. Sole sorghum was a poor competitor with weeds but the competitive ability of cowpea Intercropping with sorghum reduced the weed growth considerably. Weed free situation upto 15 days may be suflicient for obtaining optimum grain yield and net monetary returns from sorghum cowpea Intercropping system, whereas weed free upto 30 days was essential for sorghum intercropped with green gram or groundnut. The planting patterns had no impact on w

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