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Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 10
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Does mechanical weed control take effect on Sonchus arvensis? Organic Eprints
Lötjönen, Timo; Vanhala, Petri.
The main aims of this research were to study the biology of perennial weeds and to find out the best non-chemical control methods for Sonchus arvensis. The most effective control method seemed to be bare fallowing.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2003 URL: http://orgprints.org/11141/1/NJF2.pdf
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Dormancy of vegetative reproduction in some perennial weeds Organic Eprints
Fogelfors, Håkan; Brandsætter, Lars Olav; Graglia, Scientist Enrico; Vanhala, Petri; Salonen, Jukka; Håkansson, Sigurd.
In a joint experiment between Norway, Denmark, Finland and Sweden the dormancy of vegetative reproduction in Cirsium arvense, Sonchus arvensis and Elymus repens was studied during the latter part of the vegetation period.The aim of the study was to achieve a more efficient control of these weed species by knowing their reproduction behaviour in the autumn.
Tipo: Conference paper, poster, etc. Palavras-chave: Research methodology and philosophy; Weed management.
Ano: 2003 URL: http://orgprints.org/1730/1/Dormancy.pdf
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Effect of conservation tillage and peat application on weed infestation on a clay soil Organic Eprints
Vanhala, Petri; Pietola, Liisa.
Amendment of soil with peat is an attempt to avoid crop yield variation in the transition to conservation tillage, as it improves seedbed conditions and crop growth in drought-sensitive clay soils. Weed infestations were compared in 1999-2000 between the original and peat-amended clay (Typic Cryaquept, very fine, illitic or mixed) under different autumn tillage systems in an oats-barley rotation. In a field experiment, sphagnum peat (H = 4) had been spread (0.02 m 3 m -2 ) on the soil surface in August 1995. Tillage treatments included mouldboard ploughing (to 20 cm) and stubble cultivations of different working depths (8 or 15 cm) and intensity (once or twice). Weed biomass and density were assessed by an area of 1 m 2 per field plot in August 1999-2000...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2003 URL: http://orgprints.org/16752/1/vanhala.pdf
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Effect of crop species and management practices on perennial weeds in organic farming Organic Eprints
Vanhala, Petri; Lötjönen, Timo; Salonen, Jukka.
In order to study the biology and non-chemical control of perennial weeds, a three-year field experiment was established in 2001 at Vihti, southern Finland. The experiment was placed in a clay soil field under organic production, infested moderately with Cirsium arvense, Elymus repens and Stachys palustris, and heavily with Sonchus arvensis.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2003 URL: http://orgprints.org/11140/1/NJF1.pdf
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Ekogrönsaker för industrins behov med stöd av forskningen Organic Eprints
Suojala, Terhi; Kallela, Marja; Nissinen, Anne; Vanhala, Petri.
För de ekologiska grönsaker som odlas för att bli industriråvaror krävs hög kvalitet och säker produktion. Eftersom priserna är lägre än på färskvarumarknaden, krävs att odlingen genomförs till en skälig kostnad om odlarens inkomst skall tryggas.
Tipo: Journal paper Palavras-chave: Crop husbandry.
Ano: 2001 URL: http://orgprints.org/5836/1/fnytt301.pdf
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Laboratory assessment of crop tolerance to selective flaming Organic Eprints
Vanhala, Petri; Rahkonen, Jukka.
We developed a laboratory method which enables researchers of thermal weed control to assess crop tolerance to selective flaming. We have tested cabbage and red beet tolerance to flaming with this method.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 1998 URL: http://orgprints.org/11240/1/Wye.pdf
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Managing Sonchus arvensis using mechanical and cultural methods Organic Eprints
Vanhala, Petri; Lötjönen, Timo; Hurme, Timo; Salonen, Jukka.
Perennial sow-thistle (Sonchus arvensis L.) represents an increasing problem in Finland. Options for mechanical and cultural control of S. arvensis were studied in a field experiment on clay soil under organic production. The experiment consisted of different crop sequences: spring cereal (barley, Hordeum vulgare L., in 2001, oats, Avena sativa L., in 2002) with or without inter-row hoeing and/or stubble cultivation, bare fallow, fibre hemp (Cannabis sativa L.), and ley with mowing. In 2003 the entire field was sown to spring wheat. Crop plant and Sonchus shoot density and dry mass prior to cereal harvest and crop yield were assessed. The control effect was rated: bare fallow > ley > cereal with or without inter-row hoeing > poor growth fibre...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2006 URL: http://orgprints.org/16758/1/vanhala2.pdf
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Mid-summer bare fallow effective in controlling perennial weeds Organic Eprints
Kakriainen-Rouhiainen, Sanna; Väisänen, Jaana; Vanhala, Petri; Lötjönen, Timo.
The results of this study suggest that stubble cultivation before ploughing is the most effective way to reduce the amount of E. repens when bringing the long-term ley to an end.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2003 URL: http://orgprints.org/4112/1/4112.pdf
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Reglering av åkermolke och andra fleråriga ogräs Organic Eprints
Vanhala, Petri; Lötjönen, Timo.
Fleråriga rotogräs har ökat i mängd både i konventionell och ekologisk odling i Finland. I synnerhet har åkermolke (Sonchus arvensis) och åkertistel (Cirsium arvense), som båda tål jordbearbetning, förökats. Eftersom de vanligtvis växer från rotutlöpare, har ögräsharvning bara liten effekt på rotogräs. Det behövs antingen kraftigare mekaniska åtgärder eller utnyttjande av grödans konkurrenskraft och andra odlingstekniska metoder.
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2004 URL: http://orgprints.org/5794/1/fnytt404.pdf
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Relationship between the timing of seedbed preparation and the efficacy of pre-emergence flaming Organic Eprints
Vanhala, Petri.
The field experiments were conducted in 1995 and 1996. Seedbed preparation was done with a rotary tiller to 15-20 cm depth either 5-7 days prior to sowing of carrot or at the day of sowing. In both cases, flaming was done 8 days after sowing.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2002 URL: http://orgprints.org/11239/1/Elspeet.pdf
Registros recuperados: 10
Primeira ... 1 ... Última
 

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