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| PARDO,G.; MARTÍNEZ,Y.. |
| ABSTRACT: Weed control is a crucial aspect in many conservation agriculture systems given that costs and time savings from avoiding tillage are closely linked to the use of effective and environmental friendly herbicides. This has led to the widespread use of glyphosate in farms, as it is a broad-spectrum, easily degradable, low- cost herbicide. The recent debate on the safety of glyphosate and on the excessive use of chemical herbicides in food production has caused concern on farmers about the possible economic effects of a virtual ban on glyphosate. The aim of this paper is to estimate the costs associated with an eventual prohibition of glyphosate in Spanish conservation agriculture areas. The costs of different alternative weed control strategies for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation systems; Conventional tillage; Economic evaluation; Weed control. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100166 |
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| Cardoso,Eduardo Garcia; Sá,João Carlos de Moraes; Briedis,Clever; Ferreira,Ademir de Oliveira; Borszowskei,Paulo Rogério; Santos,Josiane Burkner; Massinham,Aline; Ferreira,Carla Fernanda; Siuta Júnior,Darci; Baranek,Edemar José. |
| Nitrogen is the main limiting factor in crop productivity and thereby soil management systems may change the mineralization and nitrification rates. In an experiment on soil management systems implemented in 1988 at the experimental station Fundação ABC, Ponta Grossa, in the central South region of the State of Paraná, inorganic N dynamics were examined to find a soil management strategy with a view to a sustainable environment. The objective of this study was to calculate the net mineralization and nitrification rates of soil N and the correlation with soil pH under management systems. Randomized complete block design was used, in split plots, in three replications. The following soil management systems (SMSs) were adopted in the plots: 1) conventional... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation systems; No-tillage; Conventional tillage; Soil pH. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500019 |
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