Effects of weed control strategy on weed dynamics, soybean productivity and profitability under conservation agriculture in India

Sepat, Seema; Thierfelder, Christian; Sharma, Arun Dev; Pavuluri, Kiran; Kumar, Dinesh; Iquebal, Mir Asif; Verma, Ajay

doi:10.1016/j.fcr.2017.05.017

Cited by 24 publications

(7 citation statements)

References 24 publications

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“…In particular, the highest density of competitive weeds was mentioned under minimum and conventional tillage systems, whereas the lowest density was found in no-tillage plots. Similarly, the lowest population of weeds like Echinochloa colona and Digera arvensis was found in zero tillage-raised bed conditions over a four-year study (Sepat et al, 2017). With regard to weed species diversity, the percentage of rare species was enhanced under no-tillage treatment (Gill and Arshad, 1995).…”

Section: Tillage Effect On Weed Abundance and Diversitymentioning

confidence: 90%

Weed-Species Abundance and Diversity Indices in Relation to Tillage Systems and Fertilization

Travlos

Cheimona

Roussis

et al. 2018

Front. Environ. Sci.

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Weeds pose a major threat to world agriculture by reducing detrimentally crop yield and quality. However, at the same time, weeds are major interacting components of the agroecosystems. Abundance and diversity of weeds vary significantly among the several communities. In order to evaluate each community's structure and the interactions among them, several population indices are used as key tools. In parallel, various cultivation and land management strategies, such as tillage and fertilization, are commonly used in terms of integrated weed management. Estimating the response of weed species on those practices is crucial for both biodiversity maintenance and alternative weed control methods. Many experiments have confirmed the fundamental role of tillage intensity and nutrition supply in weed species' abundance and diversity. For instance, in some studies, the abundance of perennial weeds was doubled under reduced tillage intensity. In addition, higher values of Shannon-Weiner and Pielou indices were reported in the PK fertilization treatment compared to the control and NK fertilization treatments. The objective of this paper is to provide a brief overview of the key results of these experiments and summarize the part of the literature related to the effect of tillage systems and fertilization on weed species abundance and diversity. Such knowledge could contribute to the sound design and implementation of integrated weed management programs which in turn may lead to a decrease in the density of serious and noxious weeds and an increase in the overall balance of agroecosystems.

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Section: Tillage Effect On Weed Abundance and Diversitymentioning

confidence: 90%

Weed-Species Abundance and Diversity Indices in Relation to Tillage Systems and Fertilization

Travlos

Cheimona

Roussis

et al. 2018

Front. Environ. Sci.

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“…Although some studies (Sodangi et al, 2006;Imoloame, 2014;Adigun et al, 2017) have earlier reported increased weed control efficiency and higher yields with integrated weed management, economic consideration, particularly profit is more important to farmers in driving the adoption of agricultural innovation (Pannell et al, 2006). It has also been reported that practices with the best yield may not necessarily translate to the best economic benefit to farmers (Sepat et al, 2017). Hence, this study was conducted to evaluate the economic performance of weed management methods using hoe-weeding, herbicides or their combination in soybean planted at 50-cm, 75-cm and 100-cm row spacings.…”

Section: Introductionmentioning

confidence: 99%

Economics of row spacing and integrated weed management in soybean (Glycine max L.)

et al. 2019

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The high cost of cultivation and weed management are major limiting factors to increasing soybean productivity and net returns. Field experiments were conducted in 2016 and 2017 at the Teaching and Research Farm of the Federal University of Agriculture, Abeokuta to evaluate the economic performance of different row spacings and integrated weed management system in soybean. Three row spacings (50, 75 and 100 cm) as the main plots and six weed control methods and a weedy check as sub-plot treatments were accommodated in a split-plot arrangement of a randomized complete block design with three replications. There was a significant reduction in weed biomass with a reduction in row spacing from 100 cm to 75 cm and 50 cm. Furthermore, the cost of production, grain yield and gross profit increased with a reduction in row spacing from 100 to 75 and 50. When soybean was sown at 50-cm row spacing, the application of Probaben 400EC (metolachlor 20% w/v + prometryn 20% w/v) or Butachlor 60EC (butachlor) at 2.0 kg a.i/ha each followed by supplementary hoe-weeding at 6 weeks after sowing (WAS) resulted in the highest yield of 2301-2484 kg/ha and total revenue of 2129-1972 $/ha. Conversely, three hoe-weedings resulted in the highest yield of 2155-2081 kg/ha and total revenue of 1848-1783 $/ha for crops grown at 75-and 100-cm row spacings. Despite the higher yield and revenue obtained with three hoe-weedings for crops grown at 75-and 100-cm row spacings, the gross profit and benefit-cost ratios obtained were lower than those obtained with herbicide treatments applied alone or followed by supplementary hoeweeding. In terms of profitability, soybean planted at 50-cm row spacing and treated with Probaben 400EC at 2.0 kg a.i/ha followed by supplementary hoeweeding gave the highest gross profit of 1479 $/ha. Two or three hoe-weedings in soybean planted at narrow-row (50 cm) spacing did not guarantee the highest yield, but rather increased the cost of weed control. This study suggests that narrow-row spacing (50 cm) and pre-emergence herbicides will help to reduce the number of

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“…Studies have been conducted to evaluate weed management practices including IWM with the best agronomic yield in cowpea (Osipitan et al, 2013(Osipitan et al, , 2016Adigun et al, 2014), however, reports have shown that a management practice with best agronomic yield may not necessarily translate to best economic benefit to farmers (Gupta et al, 2016;Sepat et al, 2017). Therefore, the objectives of this study were to evaluate: (1) economic benefits of weed management methods used singly and in an integrated approach; (2) influence of row-spacing on economic benefits of weed management methods.…”

Section: Introductionmentioning

confidence: 99%

Economics of Weed Management Methods as Influenced by Row-Spacing in Cowpea

Osipitan¹,

Yahaya²,

Adigun³

2018

JAS

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Weed management is an important factor that influences the economic importance of cowpea as a cheap source of food and income for many farmers. A study was conducted to evaluate economic benefits of weed management methods used singly or in an integrated approach, and to understand the influence of row-spacing on economic benefits of weed management methods. Total variable cost of cowpea cultivation was substantially influenced by cost of weed control. A single input of hand weeding resulted in higher cost of weed control than a single input of PRE-herbicide for weed control. Increase in weed control inputs or frequency did not guarantee an increase in economic benefits. For example, removing weeds three times with hand at 3, 6 and 9 weeks after planting (WAP) during the cowpea growing season did not necessarily result in the highest yield, but rather increased the variable cost of weed control. Integrating PRE-herbicide and hand weeding for weed management resulted in the highest yield and gross profit. The lowest cost of weed control provided by using PRE-herbicide gave the highest benefit-cost ratio. The differences in economic values of weed management methods were mostly not affected by cowpea row-spacing, but generally, economic benefits of management methods decreased with increase in row-spacing. Practically, this study suggests that minimizing the use of hand weeding by complementing with PRE-herbicide for weed management could help to optimize yield, and increase profitability, particularly under a narrow row-spacing in cowpea cultivation.

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Effects of weed control strategy on weed dynamics, soybean productivity and profitability under conservation agriculture in India

Cited by 24 publications

References 24 publications

Weed-Species Abundance and Diversity Indices in Relation to Tillage Systems and Fertilization

Weed-Species Abundance and Diversity Indices in Relation to Tillage Systems and Fertilization

Economics of row spacing and integrated weed management in soybean (Glycine max L.)

Economics of Weed Management Methods as Influenced by Row-Spacing in Cowpea

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