scholarly journals Supporting Crop and Different Row Spacing as Factors Influencing Weed Infestation in Lentil Crop and Seed Yield under Organic Farming Conditions

Agronomy ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 9 ◽  
Author(s):  
Piotr Kraska ◽  
Sylwia Andruszczak ◽  
Ewa Kwiecińska-Poppe ◽  
Mariola Staniak ◽  
Krzysztof Różyło ◽  
...  

A field study was conducted at the Certified Organic Farm in Poland over the period 2014–2016. This study evaluated weed infestation and seed yield of the lentil varieties ‘Tina’ and ‘Anita’, as well as of a mixture of these two varieties, sole cropped and row intercropped with naked oats as a supporting crop. Additionally, lentil was sown at a different row spacing of 20 and 25 cm. The lentil variety ‘Anita’ produced 25.3% higher yields than var. ‘Tina’. Weight of 1000 seed, number of pods per plant, and first pod height did not differ significantly in the treatments with the lentil varieties. The lentil seed yield obtained in the treatments with a supporting crop was lower by 9.4% compared with the sole cropped plots. In turn, the 1000 seed weight was 3.9% higher in the treatment where a supporting crop was used. The presence of oats as a supporting crop in lentil crop allowed crop competitiveness against weeds to be increased significantly, thus reducing their total number and dry weight by 5.3% and 30.5%, respectively. Sowing lentil at different row spacings did not have a significant effect on seed yield and weed infestation in crop. The greatest diversity of weed species was found in the treatments where the mixture of the lentil varieties was sown and in the treatment with the smaller row spacing. Intercropping of lentil with oats resulted in reduced occurrence of monocotyledonous weeds such as Echinochloa crus-galli and Elymus repens. The presence of oat as a supporting crop can effectively reduce the pressure from weeds without significantly reducing lentil cultivar yield in organic farming.

1993 ◽  
Vol 2 (6) ◽  
pp. 525-536 ◽  
Author(s):  
Jukka Salonen

Weed vegetation of spring cereal fields in southern and central Finland was analyzed by ordination methods to provide a community level description of weed populations. Attention was paid particularly to the relative importance of environmental factors affecting weed incidence such as crop management, soil properties and weather conditions. A data set of 33 weed taxa from 252 fields was subjected to both indirect and direct gradient analysis. Indirect ordination was obtained with correspondence analysis (CA), and direct gradient analyses were performed with redundancy analysis (RDA) and with canonical correspondence analysis (CCA) relating environmental factors to the occurrence of weeds. Among several management factors, continuous herbicide use explained best the variation in the species composition of weed flora. Weed vegetation was also associated with soil type, moisture conditions and soil pHH2O. Ordination diagrams visualized the species-environment interactions and detected characteristic weed species for different geographical regions. In addition to ordination analyses of weed flora, the level and structure of weed infestation are described. The density of weeds averaged 170 plants m2 (median=124) and the air-dry weight of weeds 320 kg ha-1 (median=183). The average weed density was the same in different soil types, but the weed biomass was lower in clay soils than in coarse mineral and organic soils


2018 ◽  
Vol 71 (4) ◽  
Author(s):  
Maria Wanic ◽  
Mariola Parzonka ◽  
Dariusz Załuski

Environmentally-friendly solutions are increasingly often applied in crop cultivation technologies. These include, among others, the return of old crops (e.g., spelt wheat) and crop rotation. Ensuring a proper forecrop is essential, especially in the cultivation of winter wheat, which is susceptible to infestation by weeds. However, there is only sparse information on infestation by weeds in the cultivation of winter spelt. In this study, it was assumed that this crop is invaded by weeds to a lesser extent than wheat, especially after unfavorable forecrops. The study was based on a field experiment conducted in the east part of Poland. The aim was to compare the weed infestation of common wheat and spelt wheat grown after peas, oilseed rape, and after itself. Analyses of weed infestation were conducted in 2014–2016. The weed species composition and population size were determined as well as their dry weight. The following indices were calculated: index of species richness, Simpson’s domination index, Shannon–Wiener index of species diversity, and Pielou’s index of evenness. The weed infestation of spelt wheat was higher than that of common wheat during the tillering stage. It was similar in both species during the heading stage. The lowest weed infestation in both cereals was observed on a field where peas had grown. Growing after oilseed rape and after themselves contributed to an increase in weed infestation. Biomass of weeds in a field of spelt was similar after all forecrops, unlike that in wheat, where more biomass was observed after oilseed rape and wheat. A greater share of <em>Apera spica-venti</em> and <em>Viola arvensis</em> was observed in common wheat and spelt grown after oilseed rape and after themselves. Weed communities in spelt were more diverse than in wheat. The forecrops did not differentiate the species diversity in either crop.


Author(s):  
Ye.N. Rostova ◽  

Dense white mustard (Sinapis alba L.) can suppress weeds, however excessive density negatively influences crop yields. The search for the optimal parameters for applying mineral fertilizers and the consumption of seed material will increase the crop yield and will improve its competitive ability. This work aimed to identify the seeding rate and doses of nitrogen fertilization at which white mustard plants can actively suppress weeds without reducing the productivity of the crop. In the course of this research, we established that S. alba sown at a rate of 2, 2.5 and 3 million seeds per ha suppressed the growth and development of weeds as much as possible. On average, in 2017-2019, the dry weight of weeds in the aforementioned variants was the least and reached 57.9; 42.3 and 38.4 g/m2, respectively. Weed species composition and quantitative parameters of weed infestation depended on the weather conditions of the year. The application of nitrogen fertilizer did not affect significantly the weediness of S. alba crops. The optimal density white mustard plant formed at a seeding rate of 2 million units/ha and, on average, for three years of research, the seed yield in this variant was the highest (0.6 t/ha).


2014 ◽  
Vol 66 (4) ◽  
pp. 173-184
Author(s):  
Sylwia Andruszczak ◽  
Piotr Kraska ◽  
Ewa Kwiecińska-Poppe ◽  
Edward Pałys

<p>Based on a 3-year field experiment conducted on medium heavy mixed rendzina soil, the present study evaluated the effect of chemical plant protection on the species composition, number and air-dry weight of weeds infesting crops of winter spelt wheat cultivars (‘Frankenkorn’, ‘Badengold’, ‘Schwaben- speltz’, and ‘Oberkulmer Rotkorn’) sown under ploughing and ploughless tillage systems. Ploughing tillage involved skim- ming done after harvest of the previous crop and pre-sowing ploughing, while in the ploughless tillage system ploughing was replaced with cultivating. Chemical weed control included the application of the herbicides Mustang 306 SE and Attribut 70 WG. Plots where the herbicides were not used were the control treatment. On average, from 21 to 30 weed species colonised the winter spelt wheat crops compared. <em>Galium aparine </em>and <em>Apera spica-venti </em>occurred in greatest numbers and their percentage in the total number of weeds was estimated at 26–35% and 17–25%, respectively. The cultivar ‘Frankenkorn’ was the least weed-infested. Both the number of weeds in the crop of this cultivar and their above-ground dry weight were lower compared to the other cultivars. The use of reduced tillage significantly increased the air-dry weight of weeds compared to ploughing tillage. Nevertheless, it should be indicated under ploughless tillage conditions the application of chemical crop protection reduced weed biomass by 59% compared to the control treatments without crop protection.</p>


2021 ◽  
Vol 13 (14) ◽  
pp. 8005
Author(s):  
Anna Mazurek-Kusiak ◽  
Bogusław Sawicki ◽  
Agata Kobyłka

From year to year, there is an increasing demand for agricultural produce from certified organic farms. However, Poland and Hungary’s demand for this product is almost twenty times smaller than in Western European countries. The greater the demand by consumers for organic farming products, the more agricultural producers decide to switch from conventional farming to organic farming, and this farming is more environmentally friendly because it uses energy and natural resources responsibly, maintains biodiversity, maintains regional ecological balance, improves soil food, and maintains good water quality. This research aimed to compare the motives and barriers to running organic farms in Poland and Hungary, and the challenges farmers must face to undertake the trouble of running an organic farm. The research was carried out among 400 Polish and 400 Hungarian farmers running organic farms. For statistical calculations, discriminant analysis, as well as single-base and chain indices, were used. The main barriers for establishing organic farms: the necessity to adapt one’s farm to the EU requirements, using only natural fertilizers, low yields, the lack of proper advice, and a high degree of bureaucracy. Therefore, for organic farming to develop, further education is needed, both for farmers and consumers. An important aspect is improving the quality of the regulations and simplifying the administrative burden related to organic farming.


HortScience ◽  
1995 ◽  
Vol 30 (5) ◽  
pp. 994-996 ◽  
Author(s):  
Brian A. Kahn ◽  
Peter J. Stoffella ◽  
Daniel I. Leskovar ◽  
James R. Cooksey

Cowpea [Vigna unguiculata (L.) Walp.] planters can produce variable within-row seed spacing. We determined whether precision planting of cowpea would produce a yield advantage over more random planting at the same rate. Studies were conducted from May 1992 to Feb. 1993 at three locations: Uvalde, Texas; Bixby, Okla.; and Fort Pierce, Fla. Seeds of the indeterminate, small-vine cowpea cultivars Mississippi Silver and Pinkeye Purplehull BVR were hand-planted at 42 per 3.15 m of row. Seeds within rows were either spaced uniformly at 7.5 cm [control, with sd = 0] or in one of two random sequences (sd = 4.8). At harvest, in Oklahoma and Florida, mean within-row spacings were similar, but sd values of random-sequence plots remained greater than those of control plots. Control plots averaged four more plants at harvest than random-sequence plots in Texas. However, seed yield (seed dry weight per hectare) and harvest index were unaffected by uniformity of within-row spacing at all three locations. Thus, precision seeding of indeterminate, small-vine cowpea cultivars seems unlikely to produce a yield advantage over more random planting at the same rate.


2014 ◽  
Vol 67 (3) ◽  
pp. 119-126
Author(s):  
Andrzej Woźniak ◽  
Myroslawa Soroka

The study evaluated weed infestation of pea (<em>Pisum sativum</em> L.) cultivated under conditions of conventional (CT), reduced (RT) and herbicide tillage (HT). It demonstrated the highest weed density per m<sup>2 </sup>in plots with the herbicide (HT) and reduced (RT) systems and significantly lower weed infestation in plots cultivated in the conventional system (CT). In addition, more weeds occurred at the third leaf stage (13/14 in BBCH scale) than at the pod development stage (73/74 BBCH) of pea. The highest biomass was produced by weeds in the herbicide system (HT), a lower one – in the reduced system (RT), and the lowest one – in the conventional system (CT). The air-dry weight of weeds depended also on pea development stage. At the pod development stage (73/74 BBCH), the air-dry weight of weeds was significantly higher than at the third leaf stage (13/14 BBCH). The tillage system was also observed to influence the species composition of weeds. This trait was also affected by the period of weed infestation assessment. At the third leaf stage of pea (13/14 BBCH), there occurred 26 weed species, including 24 annual ones. The most abundant species included: <em>Chenopodium album</em> L., <em>Stellaria media</em> (L.) Vill., <em>Capsella bursa-pastoris</em> (L.) Med., <em>Matricaria inodora</em> L., <em>Thlaspi arvense</em> L., and <em>Fallopia convolvulus</em> (L.) A. Löve. At the pod development stage (73/74 BBCH), the pea crop was colonized by 24 weed species, including 3 perennial ones. At this stage the predominant species included: <em>Avena fatua</em> L., <em>Amaranthus retroflexus</em> L., <em>Papaver rhoeas</em> L., <em>Echinochloa crus-galli</em> (L.) P.B., <em>Matricaria inodora</em> L., and <em>Galeopsis tetrahit</em> L.


2021 ◽  
Author(s):  
Panchapakesan Balasubramanian ◽  
Anand Atul ◽  
Anand Eshani

Abstract Green Economy defined by UNEP as one that results in improved human wellbeing and social equity, while significantly reducing environmental risks and ecological scarcities. Green economy also refers to the resilient economy that provides a better quality of life for all within the ecological limits of the planet. Major countries and agencies are looking towards a green economy that provides path ways for sustainable development and poverty eradication. While discussing the concept of Green Economy it is also important to look at the concept of Green Growth. The key economic indicator that is used to measure the Green Economy’s Growth is referred as Green GDP. The potential economic and social impacts of environmental degradation are particularly important for developing countries in order to tackle many of the growth and development issues without compromising further growth and poverty reduction. The concept of Green growth has emerged as a new approach replacing the conventional economic growth model. The GDP refers to the Gross Domestic product generation Agriculture, Industrial and Service sectors. As on 2019, in addition to ensuring food security, agriculture has contributed 15.9% to the Indian GDP and employed 42.3% of its population despite its dependence on vagaries of monsoon. Agriculture continues to be the largest provider of livelihood in rural India and the livelihood of farmers are influenced by the demand and supply of agriculture products in the country and thereby influence the economy. The organic products are priced with a premium in the market in the country. The demand for organic products across the globe, especially in developed countries, has been growing rapidly. Globally, organic farming is practiced in 162 countries and 37 million ha of land are managed organically by 1.8 million agricultural households. The sale of organic food and drink is estimated to be 63 billion US dollar in 2011 internationally. The organic farm land area had increased by 3 percent when compared to 2010. The countries with large-scale organic farm land are Australia, Argentina and United State in that order. The main contributor of expansion of cultivated area under organic agriculture in Asia is India. The cultivated area under certified organic farming has grown 17 times in the last one decade in the country. In India, certified organic farming is undertaken in all the states and Union territories. States like Uttaranchal, Karnataka, Madhya Pradesh, Maharashtra, Gujarat, Rajasthan, Tamil Nadu, Kerala, Nagaland, Mizoram and Sikkim have been promoting Organic farming. The organic produce is increasingly preferred by major urban centers in India. Huge demand for Indian organic products especially tea, coffee, cotton etc., exists in international market. The organic produces like tea, herbs, and species from Tamil Nadu are widely sought after globally. The Tandon H.L.S et al (2007) have reviewed the fertilizer consumption in Indian Agriculture for the past five decades and concluded that the Integrated Nutrient Management would be the solution for the problems faced by Indian Agriculture. Gahukar R.T et al (2009) in his paper discussed about the Sustainable Agriculture in India at that time and brought up the future needs of Sustainable Agriculture in India with a series of recommendations. Jaganathan.D et al (2012) conducted a sample survey to assess the Knowledge Level Farmers on Organic Farming in India. Amarnath J.S et al (2012) looked at the economic aspects of organic farming in Tamil Nadu. Panneerselvam.P et al (2013) studied the impact of large-scale organic conversion and food production and food security in Tamil Nadu and Madhya Pradesh. Amarnath J.S et al (2013) developed indicators for comparing sustainability in crop and diary production in Tamil Nadu. Vandana Tyagi et al (2017) discussed in detail the prospects and challenges of Green Economy in India. Kalyani.V et al (2018) concentrated briefly on various issues and prospects for organic farming in Tamil Nadu. Krishnaprabu.S et al (2019) focused on concept, application and prospects on Organic Farming in India. Jothi Sivagnanam.K et al (2019) dwelt on fertilizers’ consumption and soil health status in Tamil Nadu. Dr V. Bail Hans et al (2019) studied the relationship between the sustainable agriculture and economic growth especially in State Governments. Murugan.D et al (2020) studied the greening status of organic farming in wet and try land in Nagapattinam and Erode District of Tamil Nadu under various crops. Hinz et al (2020) concentrated on land consumption dynamics in Tamil Nadu under various scenarios. Amit Khurana et al (2020) studied the challenges and possibility in the organic and natural farming in India. Delabre et al (2021) deliberated on how sustainable food production and consumption will impact post 2020 global Bio Diversity Framework. This paper attempts probably for the first time to examine the data on consumption of inputs for evidence regarding the adaption of organic farming in the State.


Weed Science ◽  
1997 ◽  
Vol 45 (2) ◽  
pp. 296-300 ◽  
Author(s):  
Daniel A. Ball ◽  
Alex G. Ogg ◽  
Peggy M. Chevalier

Experiments were conducted at two sites for 2 yr in the Pacific Northwest dryland cropping region to determine if seeding rate of small-red lentil could enhance weed control with herbicides and increase lentil seed yield. At Pendleton, OR, and LaCrosse, WA, lentil was planted at 22 or 44 kg ha−1 in one direction in all plots. In one-half of the plots, lentil was cross-seeded at right angles with an additional 22 kg ha−1 to provide seeding rates of 22, 44, 22 + 22, and 44 + 22 kg ha−1. Seeding rate main plots were split into three herbicide treatments and an untreated control. Total weed density was reduced by increasing seeding rate at Pendleton both years when averaged over all herbicide treatments. Seeding rate reduced total weed density to a greater extent when herbicides did not adequately control weeds or when herbicides were not applied at Pendleton in 1992. Increased seeding rate also reduced total weed dry weight at Pendleton in 1992 and 1993 and at LaCrosse in 1993. The suppressive effect of increased seeding rate on weed dry weight was more evident when herbicides were not used or when herbicides gave only partial control. Herbicides generally reduced weed density, but the effectiveness of individual treatments was related to the weed species present and environmental conditions present in each experiment. Lentil aboveground dry weight production increased with seeding rate at both locations; however, only in 1 yr did lentil seed yield increase with seeding rate. The primary benefit from increased seeding rate in this study was to reduce weed density and dry weight.


2014 ◽  
Vol 66 (4) ◽  
pp. 185-194 ◽  
Author(s):  
Aleksandra Głowacka

The experiment was conducted in 2008–2010 at the Experimental Station of the Faculty of Agricultural Sciences in Zamość, University of Life Sciences in Lublin. The research design included two factors: I. Method of cultivation – sole cropping and strip cropping (the cultivation of three plants: maize, narrow-leafed lupin and oats, in neighboring strips); II. Weed control method – mechanical and chemical. The subject of this study was weed infestation in maize, narrow-leafed lupin and oats. The greatest diversity of weeds was found in the narrow-leafed lupine crop, while the lowest diversity in maize. The dominant weed species in maize, lupine and oats were <em>Echinochloa crus-galli</em>, <em>Chenopodium album </em>and <em>Galinsoga parviflora </em>which ranged from 34% to 99% of the total number of weeds. Strip cropping clearly reduced the number of weeds per unit area in the narrow-leafed lupin and oat crops as well as the aboveground dry weight of weeds in all plant species. Chemical weed control significantly decreased both the number and weight of weeds in comparison with the mechanical method.


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