402 results

Universality of Kenworthy and DRIS norms for prata and cavendish bananas grown in two environments

Vagner Alves Rodrigues Filho ORCID logo , Júlio César Lima Neves ORCID logo , Sérgio Luiz Rodrigues Donato and ORCID logo , Bruno Vinícius Castro Guimarães ORCID logo

05/Feb/2021

ABSTRACT Tissue analysis results are interpreted by comparing them with nutrient standards; however, using universal standards may lead to a misleading nutritional diagnosis. This study aimed to evaluate the degree of universality of Kenworthy and DRIS norms for irrigated ‘Prata-Anã’ (AAB) and ‘Grande Naine’ (AAA) banana plants grown in two environments. The study was carried out using a database containing leaf nutrient contents and yield data of two farms located in Ponto Novo, Bahia State, and Missão Velha, Ceará State, […]

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Effect of 26-years of soil tillage systems and winter cover crops on C and N stocks in a Southern Brazilian Oxisol

Tales Tiecher ORCID logo , Elci Gubiani ORCID logo , Maria Alice Santanna ORCID logo , Murilo Gomes Veloso ORCID logo , Ademir Calegari ORCID logo , Lutécia Beatriz dos Santos Canalli ORCID logo , [...]

27/Nov/2020

ABSTRACT Soil management and crop rotation are key factors in controlling the accumulation of C and N in the soil profile, but their long-term effect remains poorly understood for deep soil layers, especially in subtropical conditions. Using a long-term experiment (26-years), this study aimed to evaluate the effect of different soil management systems associated with different winter cover crops on C and N accumulation in a very clayey (72 % clay) soil up to 1 m deep. Two tillage systems […]

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Soil fertility and nutritional status of elephant grass fertilized with organic compost from small ruminant production and slaughter systems

Graziella de Andrade Carvalho Pereira ORCID logo , Anacláudia Alves Primo ORCID logo , Abner José Girão Meneses ORCID logo , Maria Diana Melo de Araújo ORCID logo , Roberto Cláudio Fernandes Franco Pompeu ORCID logo , Fernando Lisboa Guedes ORCID logo , [...]

27/Nov/2020

ABSTRACT The application of organic composts derived from animal husbandry or agro-industry is a promising option to improve nutrient cycling and supply of soils and, consequently, forage production. The objective of this study was to evaluate the soil chemical properties and the nutritional state of elephant grass in response to rates of organic fertilizer composted from the waste of small ruminant production and slaughter systems. The experiment was conducted on a Fluvisol of a forage field with elephant grass var. […]

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Phytomass input and nutrient cycling under different management systems in dwarf cashew cultivation

Gislane Mendes de Morais ORCID logo , José Ferreira Lustosa Filho ORCID logo , João Paulo Bezerra Saraiva ORCID logo , Helon Hebano de Freitas Sousa ORCID logo , Júlio César Lima Neves ORCID logo , Eduardo de Sá Mendonça ORCID logo , [...]

27/Nov/2020

ABSTRACT Rational management of spontaneous plants is an alternative for increasing productivity in tree crops. This study aimed to evaluate the impact of management systems between rows and under the canopy of early dwarf cashew trees on the soil chemical properties and light-fraction organic matter and cashew root systems; we also evaluated the nutrient inputs from the spontaneous plants phytomass and cashew leaves deposited on an Arenic Kandiustults. The management systems under study were disc harrowing (DH) and mechanical mowing […]

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Clonal teak litter in tropical soil: decomposition, nutrient cycling, and biochemical composition

Valéria Santos Cavalcante ORCID logo , Márcio Luiz dos Santos ORCID logo , Luisa Carla Cotta ORCID logo , Júlio César Lima Neves ORCID logo , Emanuelle Mercês Barros Soares ORCID logo

26/Nov/2020

ABSTRACT: Litter decomposition dynamics and nutrient release are also dependent on their biochemical composition, and such information is important for adequate nutritional management but is still incipient for plants like teak. This study aimed to evaluate the decomposition dynamics, nutrient release, and biochemical composition of clonal teak litter. The study was conducted in areas of clonal teak stands, in São José do Rio Claro, Mato Grosso, Brazil. Litter collectors were arranged in the area to collect material along the entire […]

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Different N-fertilization sources affecting the native soil organic matter mineralization on Technosols under iron ore tailing

Paula Afonso de Oliveira ORCID logo , Igor Rodrigues de Assis ORCID logo , Luiz Eduardo Dias ORCID logo , Ivo Ribeiro da Silva ORCID logo , Gustavo Magalhães Nunes Barbosa ORCID logo , Rafael da Silva Teixeira ORCID logo , [...]

26/Nov/2020

ABSTRACT: Accidents related to the rupture of iron ore tailings dams have dramatically impacted on the Brazilian natural ecosystem. So, the development of strategies to recover soil organic matter levels and build-up Technosols are required. This study aimed to evaluate the effect of N-mineral and -organic fertilization and the rhizospheric effect on soil organic matter mineralization from Technosols built under iron ore tailings. The experiment was carried out in a greenhouse; we used a factorial scheme 2 × 2 × […]

Sediment source and volume of soil erosion in a gully system using UAV photogrammetry

Bernardo Moreira Cândido ORCID logo , Mike James ORCID logo , John Quinton ORCID logo , Wellington de Lima ORCID logo , Marx Leandro Naves Silva ORCID logo

11/Nov/2020

ABSTRACT Gully erosion is a severe way of land degradation. Gullies threaten the sustainability of agro-ecosystems, causing quantitative and qualitative reduction of groundwater, farmland productivity, and waterways sedimentation. Since the gully development on the surface begins with water flow and sheet erosion, accurate monitoring of the erosive processes in a gully system and its quantification is key for the development of effective strategies to control soil erosion in gullies. Here, we demonstrate the first use of unmanned aerial vehicle (UAV) […]

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Evaluation of traditional methods for estimating lime requirement in Brazilian soils

Welldy Gonçalves Teixeira ORCID logo , V Víctor Hugo Alvarez ORCID logo , Júlio César Lima Neves ORCID logo , Rodrigo Bazzarella Paulucio ORCID logo

11/Nov/2020

ABSTRACT The optimal soil pH for most annual crops in Brazil varies between 5.7 and 6.0. Numerous methods have been developed for estimating lime requirement (LR), but they vary widely in their predictions and fail to raise pH to desired values for optimum crop production in the highly weathered soils of Brazil. The objectives of this study were to (i) compare seven traditional methods for estimating LR in Brazilian soils; (ii) assess the effects of LR predicted by these methods […]

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Developing scoring functions to assess soil quality at a regional scale in rangelands of SW Spain

Manuel Pulido Fernández ORCID logo , Ali Keshavarzi ORCID logo , Jesús Rodrigo-Comino ORCID logo , Susanne Schnabel ORCID logo , Joaquín Francisco Lavado Contador ORCID logo , Álvaro Gómez Gutiérrez ORCID logo , [...]

06/Nov/2020

ABSTRACT The drawing of maps of soil quality at a large scale is increasingly being more useful to land planners and stakeholders. Nevertheless, it involves different methodological steps from the description of soil profiles in the field until the regional mapping of integrative soil quality index (IQI) values. The development of proper scoring functions is a paramount task for the calculation of these IQI values since every parameter needs to be standardized accordingly and weighting factors are usually estimated by […]

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Hydrosedimentological modeling in a headwater basin in Southeast Brazil

Eliete Nazaré Eduardo Mauri ORCID logo , Marcelo Ribeiro Viola ORCID logo , Lloyd Darrell Norton ORCID logo , Phillip Ray Owens ORCID logo , Carlos Rogério de Mello ORCID logo , Leandro Campos Pinto ORCID logo , [...]

23/Oct/2020

ABSTRACT Hydrosedimentological modeling is a useful tool to predict the water dynamic in a basin and for water resources management. This study aimed to i) evaluate the ability of Soil and Water Assessment Tool (SWAT) to model sediment load and continuous monthly streamflow in the Mortes River Basin (MRB) in Southeastern Brazil; ii) estimate the sediment yield spatially distributed by sub-basins; iii) estimate the sediment load export to the Funil Hydroelectric Power Plant reservoir (FHPP), located in the MRB outlet. […]

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