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All publications of “Michael Mazurana”

6 results

Crop Yield Responses to Sulfur Fertilization in Brazilian No-Till Soils: a Systematic Review

Osmar Henrique de Castro Pias ORCID logo , Tales Tiecher, Maurício Roberto Cherubin, Michael Mazurana, Cimélio Bayer


ABSTRACT Sulfur (S) fertilization recommendations for grain crops in Brazil were formerly established from studies on crops with a low yield potential grown on soils under conventional tillage (CT). However, the subsequent adoption of no-tillage (NT) altered S dynamics in the soil, making it necessary to carefully evaluate the applicability of these S fertilizer recommendations. In addition, the emergence of modern high-yield-potential genotypes, the successive application of concentrated low-sulfur fertilizers, and reduction in S atmospheric deposition have raised the likelihood […]

Root Distribution of Peach Rootstocks Affected by Soil Compaction and Acidity

Henrique Belmonte Petry, Michael Mazurana, Gilmar Arduíno Bettio Marodin, Renato Levien, Ibanor Anghinoni, Clésio Gianello and, [...]


ABSTRACT Root growth can be limited by physical and chemical conditions of the soil. Compacted and acidic soils, where there is an occurrence of exchangeable Al, constitute barriers to use of the soil by plant roots. The hypothesis of this study was that physical and chemical properties of the inter-row soil of a peach orchard influence the root distribution of different rootstocks. The aim of this study was to describe and register the soil physical and chemical properties and root […]

Physical-hydraulic properties of a sandy loam typic paleudalf soil under organic cultivation of ‘montenegrina’ mandarin (Citrus deliciosa Tenore)

Caroline Valverde dos Santos, Renato Levien, Sérgio Francisco Schwarz, Michael Mazurana, Henrique Belmonte Petry, Lucas Zulpo, [...]


Citrus plants are the most important fruit species in the world, with emphasis to oranges, mandarins and lemons. In Rio Grande do Sul, Brazil, most fruit production is found on small properties under organic cultivation. Soil compaction is one of the factors limiting production and due to the fixed row placement of this crop, compaction can arise in various manners in the interrows of the orchard. The aim of this study was to evaluate soil physical properties and water infiltration […]

Soil physical properties and maize root growth in an ultisol under controlled machine traffic

Michael Mazurana, Jessé Rodrigo Fink, Victor Hugo da Silveira, Renato Levien, Lucas Zulpo, Darlan Brezolin


Soil functions can be hampered by compaction induced by inadequate management. Some soil physical properties are indicators of the existence of compacted layers that can affect the root development of crops. Agricultural practices, e.g., planting of cover crops to improve soil properties, can mitigate the compaction-related problems. The aim of this study was to evaluate the physical attributes of soil and plants, grown under controlled conditions. In an Ultisol under no-tillage with two winter cover crops (fallow and oat + […]

Soil tillage systems: changes in soil structure and crop response

Michael Mazurana, Renato Levien, Jônatan Müller, Osmar Conte


The introduction and intensification of no-tillage systems in Brazilian agriculture in recent decades have created a new scenario, increasing concerns about soil physical properties. The objective of this study was to assess the effects of different tillage systems on some physical properties of an Ultisol previously under native grassland. Five tillage methods were tested: no-tillage (NT), chiseling (Ch), no-tillage with chiseling every two years (NTCh2), chiseling using an equipment with a clod-breaking roller (ChR) and chiseling followed by disking (ChD). […]

Bearing capacity and compressibility of argisol (paleudult) as affected by traffic and winter cover crops

Henrique Debiasi, Renato Levien, Carlos Ricardo Trein, Osmar Conte, Michael Mazurana


One of the most effective practices in preventing soil compaction is to apply stresses below the bearing capacity of the soil, often estimated by the pre-compression stress (σp). To evaluate the effects of cover crops and tractor traffic on σp and compression index (CI), a field experiment was initiated in 2002 on sandy clay loam Paleudult, in Southern Brazil (Rio Grande do Sul State). Treatments under no-tillage involved winter fallow and two winter cover crops (black oats and black oats […]