Conservation agriculture practices adopted in southern Brazil

Telles, Tiago Santos; Righetto, Ana Julia; Costa, Gustavo Vaz da; Volsi, Bruno; Oliveira, José Francirlei de

doi:10.1080/14735903.2019.1655863

Cited by 17 publications

(7 citation statements)

References 37 publications

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“…Especially considering the economic pressure on subsistence farmers, mainly those who farm leased land. This indicates the low quality of the current conservation system, which falls short of the desired CA (Pittelkow et al, 2015;Telles et al, 2019a).…”

Section: Discussionmentioning

confidence: 99%

“…Three basic approaches, or pillars, form the foundations of Conservation Agriculture (CA): (i) the sowing system (i.e., no-tillage, except along the furrow); (ii) constant soil cover, keeping plant biomass on the soil surface; and (iii) crop rotation, with the emphasis on diversification, growing at least three species over a three-year cycle (Bolliger et al, 2006;Kassam et al, 2019). Given the high rainfall erosivity in Southern Brazil (Oliveira et al, 2013), NT alone is not sufficient to ensure soil conservation, and other practices must be implemented, such as level planting and agricultural terracing (Telles et al, 2019a).…”

Section: Introductionmentioning

confidence: 99%

“…However, not all the pillars of CA have been implemented according to the recommendations (Pittelkow et al, 2015;Telles et al, 2019a), and other conservation practices have been implemented partially (Didoné et al, 2015;Minella et al, 2017). This could increase soil erosion and degradation (Silva and De Maria, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Soil management practices adopted by farmers and how they perceive conservation agriculture

Telles¹,

Melo²,

Righetto³

et al. 2022

Revista Brasileira De Ciência Do Solo

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In some rural properties of Brazil, soil and water conservation practices are partially or inappropriately implemented, intensifying soil erosion, even in no-tillage (NT) areas. This study aimed to check the farmer's understanding of conservation agriculture (CA) and assess whether they are using practices appropriate to soil conservation. A basin in the state of Paraná, in Southern Brazil, was selected. Surveys were conducted based on a structured questionnaire and in-person interviews of 234 farmers. Among these farmers, 67 % do not understand CA pillars adequately, and 68 % stated they have been using NT for over 12 years. However, 58 % stated that they carried out some kind of soil preparation. Furthermore, some of the farmers only partially implemented CA, adopting a low level of crop diversification. The main problems pointed out by the farmers to justify simplifying the CA approach were soil compaction, low production of plant biomass and resistance of weeds to herbicides. Most farmers in the study do not have enough knowledge of the pillars of CA. As a result, there is little diversification in crop rotation, and the soil is continually disturbed with chiseling. Furthermore, although most farmers use terracing, they drive sprayers crossing terraces and following the slope, a practice that can impair the capacity of terraces to control surface water runoff. These practices do not contribute to soil and water conservation and endanger the sustainability of agricultural production systems.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Soil management practices adopted by farmers and how they perceive conservation agriculture

Telles¹,

Melo²,

Righetto³

et al. 2022

Revista Brasileira De Ciência Do Solo

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“…The choice of farmers for systems with little diversification is largely justified by the short-term economic return (MARCELO et al, 2012). However, these systems go against what is recommended from a technical-agronomic point of view and conservation agriculture (KASSAM et al, 2009;TELLES et al, 2019). This is because the adoption of these cultivation systems may lead to several obstacles in the sustainability of agricultural production, such as the development of pests, diseases, weeds, and nematoids, and may result in loss of soil quality, compromising its productive capacity (VEZZANI;MIELNICZUK, 2009).…”

Section: Introductionmentioning

confidence: 99%

Economic profitability of crop rotation systems in the Caiuá sandstone area

et al. 2020

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Even in areas of predominance of Caiuá sandstone, with soils of low natural fertility that are highly susceptible to erosion and degradation processes, farmers have adopted systems with little diversification, because they believe that they provide a greater economic return. However, agricultural practices such as crop rotation can bring agronomic benefits in terms of conservation agriculture, in addition to economic gains, circumventing edaphoclimatic difficulties in the region. In this context, the objective of this study is to verify whether no-till crop rotation systems are economically profitable, in a Caiuá sandstone area in the northwest region of the Brazilian state of Paraná. To this end, an experiment was conducted in the municipality of Umuarama, state of Paraná, in the crop year 2014/15 to 2016/17. The experimental design used random blocks, with four treatments and four repetitions. The treatments consisted of four crop rotation systems, involving wheat, black oats, canola, safflower, rye, crambe, beans, maize, fodder radish, soybean, sorghum, lupin beans, buckwheat, and triticale cultivars. Crop yields, operating costs, income, and net farm income were assessed. From the results, it was reported that the highest income was obtained in the systems that adopted the largest number of winter and summer commercial crops. Only one treatment was profitable, that is, it had a positive net farm income. This scenario may be associated with the fragility of the region’s soil, which having low fertility, requires a high investment in fertilization and liming to ensure adequate production.

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“…Nesse sentido, sistemas de manejo conservacionistas e sustentáveis, que visam melhorar a qualidade e reduzir as perdas de solo se fazem necessários (BORGES et al, 2015; KASSAM; FRIEDRICH; DERPSCH, 2019). Segundo Telles et al (2019), o sistema de plantio direto, que se caracteriza pelo cultivo sobre a palhada de culturas anteriores e o mínimo revolvimento do solo, vem sendo utilizado no Brasil, principalmente, para reduzir as perdas de solo por erosão. Essa prática associada à rotação de culturas também influencia, no curto prazo, a produtividade das culturas, devido a alterações na disponibilidade de água e nitrogênio no solo, e, no longo prazo, afetando a quantidade de matéria orgânica no solo (AL-KAISI et al, 2015).…”

Section: Introductionunclassified

Produtividade Do Milho Irrigado Na Região Do Arenito Caiuá No Noroeste Do Paraná

Prado¹,

Tinos

Mahl

et al. 2020

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Produtividade do milho irrigado na região do Arenito Caiuá no Noroeste do Paraná Giuliani do Prado1; Adriano Catossi Tinos1; denise mahl1 e rafael de almeida schiavon1 1 Departamento de Engenharia Agrícola - DEA, Universidade Estadual de Maringá - UEM, Rodovia PR 482, km 45, CEP: 87.820-000, Cidade Gaúcha-PR, Brasil. E-mail: gprado@uem.br, actinos@uem.br, demahl@gmail.com, raschiavon@gmail.com. 1 RESUMO Este trabalho foi desenvolvido na Universidade Estadual de Maringá, em Cidade Gaúcha/PR, e objetivou avaliar a produtividade da variedade de milho IPR-164, em diferentes sistemas de cultivo e lâminas de irrigação. O experimento, conduzido entre 01/10/2019 a 10/02/2020, foi estabelecido em faixas, com parcelas subdivididas, quatro repetições e dois tratamentos (sistemas de cultivo e lâminas de irrigação). Nas parcelas, os sistemas de cultivo foram: semeadura convencional e semeadura direta. Nas subparcelas, as lâminas de irrigação (percentual da lâmina líquida - %IL) foram: 0, 30, 63, 100 e 193%. Após a colheita, a produtividade de espigas (com e sem palha) e de grãos na umidade de 20,5 e 13% foram avaliadas. Os resultados mostraram que: 1) o sistema de cultivo não influenciou na produtividade; 2) a produtividade respondeu de forma quadrática às lâminas de irrigação; 3) lâminas próximas a 100% da IL resultaram em produtividades máximas e; 4) a sensibilidade ao déficit hídrico promoveu decréscimos de 20,4% na produtividade. Quando o custo do milímetro de água for 10 vezes maior que o custo do quilograma do milho (umidade 13%), economicamente é mais viável produzir 7.957 kg ha-1 com 60% da IL do que alcançar a produtividade máxima (8.283 kg ha-1). Palavras-chave: lâminas de irrigação, sistemas de cultivo, déficit hídrico. Prado, G; Tinos, A. C.; mahl, D; schiavon, R. A. Irrigated corn yield at the Arenito Caiuá region in Northwest of Paraná State, Brazil 2 ABSTRACT This work was performed at Universidade Estadual de Maringá, in Cidade Gaúcha/PR city, Brazil, and aimed to evaluate the corn variety IPR-164 yield, in different tillage systems and irrigation depths. The experiment, carried out from 10/01/2019 to 10/02/2020, was set in strips design, with subdivided plots, four replications, and two treatments (tillage systems and irrigation depths). In the plots, the tillage systems were: conventional-tillage and no-tillage. In the subplots, the irrigation depths (percentage of the net irrigation depth - %NID), were: 0, 30, 63, 100, and 193%. After harvesting, the data corn ear yield (in-husk and unhusked) and the grain yield with the moisture of 20.5 and 13% were evaluated. The results showed that: 1) the tillage system did not influence the corn yield; 2) corn yield presented a quadratic response to the irrigation depths; 3) irrigation depths close to 100% of NID provided maximum yield; 4) the sensitivity to water deficit led to a 20.4% decrease in corn yield. When the millimeter water cost is 10 times greater than the corn kilogram cost (moisture 13%), it is economically more profitable to produce 7,957 kg ha-1 with 60% of NID than to reach the maximum yield (8,283 kg ha-1). Keywords: irrigation depths, tillage systems, water deficit.

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Conservation agriculture practices adopted in southern Brazil

Cited by 17 publications

References 37 publications

Soil management practices adopted by farmers and how they perceive conservation agriculture

Soil management practices adopted by farmers and how they perceive conservation agriculture

Economic profitability of crop rotation systems in the Caiuá sandstone area

Produtividade Do Milho Irrigado Na Região Do Arenito Caiuá No Noroeste Do Paraná

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