3296 results

Lime and phosphogypsum application management: changes in soil acidity, sulfur availability and crop yield

Marcos Renan Besen ORCID logo , Ricardo Henrique Ribeiro ORCID logo , Michel Esper Neto ORCID logo , Evandro Antonio Minato ORCID logo , Carolina Fedrigo Coneglian ORCID logo , Wagner Deckij Kachinski ORCID logo , [...]

13/Aug/2021

ABSTRACT Oxisols ( Latossolos ) are widely distributed in tropical zones and generally characterized by high levels of surface and subsurface acidity. In Brazil, most Oxisols are managed under no-till conditions with surface application of acidity amendments. This study aimed to evaluate lime application strategies (incorporated and surface) for achieving the desired soil base saturation (BS%) levels (44, 60, 70, and 90 %) and the effect of phosphogypsum + lime application on soil chemical properties as well as wheat and […]

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Soil classes and properties explain the occurrence and fruit production of Brazil nut

Camila Santos da Silva ORCID logo , Lucielio Manoel da Silva ORCID logo , Lucia Helena de Oliveira Wadt ORCID logo , Daniela Popim Miqueloni ORCID logo , Katia Emidio da Silva ORCID logo , Marcos Gervasio Pereira ORCID logo

13/Aug/2021

ABSTRACT Soil properties and classes can influence the occurrence of plants and the production of Brazil nut fruits and may have a different distribution between sites. This study aimed to evaluate the relationship of plants’ occurrence, production of Brazil nut fruits, and spatial variability of the properties in different soil classes in two Brazil nut stand in the state of Acre, Brazil. The study was conducted in two plots in two native Brazil nut stand, Cachoeira (CP01 and CP02 – […]

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Mulching films affecting soil bacterial and fungal communities in a drip-irrigated potato soil

Wen Wang ORCID logo , Lu Han ORCID logo , Xiong Zhang ORCID logo

06/Aug/2021

ABSTRACT Film mulching is an effective water-saving and yield-increasing measure for potato production in Northwest China. However, the response mechanism of microbial communities to mulching films in the soil is still unclear. In this study, polyethylene film mulching (PM), biodegradable film mulching (BM), liquid film mulching (LM), and non-mulching (NM) were applied on the drip-irrigated soil to investigate the effects of mulching films on soil bacterial and fungal communities through DNA sequencing, Pearson correlation analysis, and redundancy analysis. The results […]

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Characterization and manipulation of montmorillonite properties towards technological and environmental applications

Vander Freitas Melo ORCID logo , Regiane Salata ORCID logo , Gilberto Abate ORCID logo , Antonio Carlos Azevedo ORCID logo , Larissa Kummer ORCID logo

29/Jul/2021

ABSTRACT The combination of pillarization and charge neutralization with Li+ can make montmorillonite an important support material for industry and decontamination of pollutants in soil and water. Montmorillonite characterization techniques were described in detail, and pillarization procedures were used, after Li+ saturation, to modify and manipulate the chemical and mineralogical surface properties of this montmorillonite. Eight samples were produced: 1) natural montmorillonite (Chisholm Mine – MMT); 2) Li+ saturated montmorillonite (MMTLi); 3) polyethylene glycol (PEG) Al-pillared montmorillonite (AlPEG); 4) PEG […]

Estimating lateral flow in double ring infiltrometer measurements

Daniel Boeno ORCID logo , Paulo Ivonir Gubiani ORCID logo , Quirijn de Jong Van Lier ORCID logo , Rodrigo Pivoto Mulazzani ORCID logo

29/Jul/2021

ABSTRACT The steady infiltration rate of soil profiles is commonly determined for irrigation and soil conservation planning, but the divergence of methods reduces the reliability of measurements. In this study, the steady infiltration rate measured with a double ring infiltrometer (isr-dri) in different layers of a soil profile was compared between layers and with the steady vertical saturated flow rate estimated by the Richards equation (isr-hy). The measurements of isr-dri at the top of the A, E, and Bt horizons […]

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Biochar and conventional compost reduce hysteresis and increase phosphorus desorbability in iron mining waste

Rafael Silva Guedes ORCID logo , Duane Azevedo Pinto ORCID logo , Sílvio Junio Ramos ORCID logo , Yan Nunes Dias ORCID logo , Cecílio Fróis Caldeira Junior ORCID logo , Markus Gastauer ORCID logo , [...]

21/Jul/2021

ABSTRACT: Phosphorus (P) fixation in the soil reduces the utilization of this element by plants and can be one of the main problems for fertilization management in soils containing Fe oxides. As a strategy to minimize the effects of P retention, organic materials, such as biochar or commercial composts, may be useful tools to maintain P availability and delay immobilization of this element in the soil, thereby benefiting, for example, the rehabilitation of areas impacted by Fe mining. The objective […]

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Amazonian Dark Earths in Rondônia State: Soil properties, carbon dating and classification

Rafael de Souza Cavassani ORCID logo , Lúcia Helena Cunha dos Anjos ORCID logo , Marcos Gervasio Pereira ORCID logo , Andrés Calderin Garcia ORCID logo

29/Jun/2021

ABSTRACT Throughout the Amazon region, dark-colored soils with increased fertility are identified and referred as Amazonian Dark Earths (ADE). These unique soils are characterized by an anthropic surface horizon with dark colors, presence of charcoal and artifacts, in contrast with surrounding non-ADE soils. The ADEs show extraordinary properties such as the capacity of maintaining the dark colors and high nutrient levels after years of farming, even under the highly favorable climatic conditions for oxidation of organic matter and weathering of […]

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Rock size fragments reduction allow including their effect on water retention properties determined with a dew point potentiometer

Paulo Ivonir Gubiani ORCID logo , Caroline Andrade Pereira ORCID logo , Jussara Santoli Cauduro ORCID logo , Colin Campbell ORCID logo , Leonardo Rivera ORCID logo , Cassiano Salin Pigatto ORCID logo , [...]

24/Jun/2021

ABSTRACT The relation between water content and water potential is a key soil hydraulic property. The presence of rock fragments in soils can affect this property in bulk soil. In this study, we focused on the relation property determined with a WP4 dew point potentiometer. The objective was to evaluate the hypothesis that breaking large gravel-size particles into smaller fragments is a suitable strategy for accurate WP4 measurements in coarse materials without affecting the retention properties. Ten initial samples of […]

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On-farm evaluation of regenerative land-use practices in a semi-arid pasture agroecosystem in West Texas, USA

Lindsey Slaughter ORCID logo , Sanjit Deb ORCID logo , Somsubhra Chakraborty ORCID logo , Bin Li ORCID logo , Noura Bakr ORCID logo , Bryanna Edwards ORCID logo , [...]

02/Jun/2021

ABSTRACT Continually rising scarcity in water and nutrient resources, especially in semi-arid agricultural systems, combined with increased frequency of extreme weather events such as drought, contribute to a growing need for resilient and regenerative agricultural ecosystems. However, evaluating a myriad of combinations of producer-led sustainable management practices in on-farm research remains challenging. Few studies have elucidated spatial variability in measured soil properties across the study area due to logistical and economic constraints. As such, this study aimed to: 1) establish […]

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Is cassava yield affected by inverting tillage, chiseling or additional compaction of no-till sandy-loam soil?

José Miguel Reichert ORCID logo , Eracilda Fontanela ORCID logo , Gabriel Oladele Awe ORCID logo , Johnson Toyin Fasinmirin ORCID logo

02/Jun/2021

ABSTRACT Defining a suitable soil tillage option that provides adequate soil physical conditions for optimum cassava (Manihot esculenta Crantz) productivity has not been adequately researched in southern Brazil. This study aimed to evaluate, in an Argissolo Vermelho-Amarelo Distrófico (Acrisol or Hapludalf), three tillage methods – conventional (inverting) tillage, chiseling, and long-term no-tillage (without and with, additional soil compaction), as affecting soil hydro-physical properties and cassava yield, in southern Brazil. Undisturbed and disturbed soil samples were collected from row and interrow […]

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