3296 results

Cover crops and controlled-release urea decrease nitrogen mobility and improve nitrogen stock in a tropical sandy soil with cotton cultivation

Carlos Felipe dos Santos Cordeiro ORCID logo , Daniel Rodela Rodrigues ORCID logo , Ana Flávia de Souza Rorato ORCID logo , Fábio Rafael Echer ORCID logo

02/Feb/2022

ABSTRACT Sandy soil often has low nitrogen (N) stock. Thus, crops grown in sandy soil rely on high levels of N fertilization. The use of cover crops and efficient fertilizers can increase N stock in the soil and N availability in the topsoil, and reduce overall fertilizer costs. The objective of this study was to evaluate the effects of cover crops (fallow, a single grass species (ruzigrass), two grass species (ruzigrass + millet), one grass species (millet) with legumes [lime-yellow […]

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Rainfall erosivity estimation: Comparison and statistical assessment among methods using data from Southeastern Brazil

Dione Pereira Cardoso ORCID logo , Junior Cesar Avanzi ORCID logo , Daniel Furtado Ferreira ORCID logo , Salvador Francisco Acuña-Guzman ORCID logo , Marx Leandro Naves Silva ORCID logo , Fábio Ribeiro Pires ORCID logo , [...]

02/Feb/2022

ABSTRACT Rainfall erosivity (R factor) is one of the six factors of the Universal Soil Loss Equation, being calculated based on the product of rainfall kinetic energy multiplied by its 30-minute maximum intensity. However, the lack of detailed and reliable rainfall data in many parts of the world has driven the use of other methods to estimate rainfall erosivity based on daily, monthly or annual data. These methods still need to be assessed to determine if their estimates are consistent […]

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Nitrogen release from pelletized poultry fertilizer in two soils: influence of soil moisture and microbial biomass

Elga Monaci ORCID logo , Carlo Angeletti ORCID logo , Cristiano Casucci ORCID logo , Costantino Vischetti ORCID logo

28/Jan/2022

ABSTRACT Nitrogen release from organic amendments, e.g., from organic agriculture, is a key process to raise soil fertility to sustain crop production in low environmental impact agroecosystems. This study aimed to investigate nitrogen release from a pelletized organic amendment containing poultry litter, guano and pot ale applied to soil from a field under two different management systems: an alfalfa-based crop rotation, enriched with N by the legume, under low-intensity tillage and a cereal-sunflower crop rotation under high-intensity tillage. Both sample […]

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Soil physical change and sugarcane stalk yield induced by cover crop and soil tillage

Camila Viana Vieira Farhate ORCID logo , Zigomar Menezes de Souza ORCID logo , Maurício Roberto Cherubin ORCID logo , Lenon Henrique Lovera ORCID logo , Ingrid Nehmi de Oliveira ORCID logo , Wellingthon da Silva Guimarães Júnnyor ORCID logo , [...]

28/Jan/2022

ABSTRACT Conventional tillage and intensive machinery traffic are the major causes of physical soil degradation in sugarcane fields. This study evaluates the impact of adopting conservation management practices during sugarcane planting on soil physical properties and stalk yield of sugarcane in the municipality of Ibitinga, state of São Paulo, Brazil. The experimental design (split-block) included four cover crops and three soil tillage systems, with three repetitions. For comparison purposes, a control treatment was also included (without cover crop and under […]

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Nitrogen use efficiency and grain yield of corn hybrids as affected by nitrogen rates and sowing dates in subtropical environment

Antonio Eduardo Coelho ORCID logo , Luis Sangoi ORCID logo , Alvadi Antonio Balbinot Junior ORCID logo , Hugo François Kuneski ORCID logo , Marcos Cardoso Martins Júnior ORCID logo

13/Jan/2022

ABSTRACT Delay of sowing date in subtropical environments with long growing seasons can modify the yield response of corn hybrids to nitrogen (N) fertilization. This study evaluated the effects of the sowing time, and N top-dress rate on corn hybrids’ yield and N-use efficiency with different cycles. Two field experiments were carried out in subtropical environment of southern Brazil. The following factors were investigated: corn hybrids (AG9025, super early cycle and P30F53, early cycle), sowing times (early and late spring), […]

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Growth and phosphorus uptake by cassava in P-deficient soil in response to mycorrhizal inoculation

Lucas Guilherme Cavallari ORCID logo , Adalton Mazetti Fernandes ORCID logo , Lydia Helena da Silva de Oliveira Mota ORCID logo , Hugo Mota Ferreira Leite ORCID logo , Valkíria Luísa Borsa Piroli ORCID logo

30/Nov/2021

ABSTRACT Phosphorus (P) is one of the most difficult nutrients for plants to acquire because of its low content in the soil solution. Cassava (Manihot esculenta Crantz) has a thick and sparse absorbent root system; therefore, it is dependent on its association with arbuscular mycorrhizal fungi (AMF) for P acquisition from the soil. Thus, inoculation of cassava with AMF can improve the development of this root crop. This study evaluated the effects of soil disinfection (disinfected vs. natural) and the […]

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Interplays between Atta ants (Formicidae: Attini), soils and environmental properties in the Brazilian Neotropics: a preliminary assessment

Carlos Ernesto Gonçalves Reynaud Schaefer ORCID logo , Renata Jordan Henriques ORCID logo , Lhoraynne Pereira Gomes ORCID logo , Rodrigo Gomes Gorsani ORCID logo , Michel Filiphy Silva Santos ORCID logo , Daniela Pinto de Souza Fernandes ORCID logo

30/Nov/2021

ABSTRACT Leaf-cutting ants are the most important herbivore in the neotropics, represent active agents of pedobioturbation, and are regarded as ecosystem engineers. These ants have a wide variety of ecological functions, such as pollination, seed dispersal, and tree-growing control. Despite this importance, little is known on their distribution in relation to possible soil and environmental conditions that affect Atta ants occurrence. This study aimed to spatialize the main occurrences of Atta species in the Brazilian territory and evaluate the main […]

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Contribution of enzymes to soil quality and the evolution of research in Brazil

Lisiane Sobucki ORCID logo , Rodrigo Ferraz Ramos ORCID logo , Leonardo Arocha Meireles ORCID logo , Zaida Inês Antoniolli ORCID logo , Rodrigo Josemar Seminoti Jacques ORCID logo

30/Nov/2021

ABSTRACT Extracellular soil enzymes are fundamental for the functioning of ecosystems. Several processes in the soil depend on the activity of these enzymes, including plant decomposition, soil organic matter formation/mineralization, and nutrient cycling. Moreover, extracellular enzyme activity occurs in the soil and is therefore influenced by environmental factors. Due to the high sensitivity to these factors, extracellular enzymes are used for monitoring soil quality. This review aimed to present the main contributions of soil enzymes to agriculture, emphasizing the dynamics […]

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Topsoil depth influences the recovery of rupestrian grasslands degraded by mining

Lina Andrade Lobo Rezende ORCID logo , Geraldo Wilson Fernandes ORCID logo , Ramon de Paula Braga ORCID logo , Luiz Eduardo Dias ORCID logo , Vanessa Matos Gomes ORCID logo

24/Nov/2021

ABSTRACT Close association of iron mining and ferruginous rupestrian grassland places this ecosystem in a special condition of vulnerability, with a large number of degraded areas requiring restoration. Seedling transplantation and topsoil translocation can be used to recover native vegetation in degraded areas. This study aimed to experimentally test the application of two different topsoil depths (0.20 and 0.40 m) in a degraded area. We assessed the vegetation’s natural recovery and the survival of transplanted native species from rescue operations […]

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Fine-scale soil mapping with Earth Observation data: a multiple geographic level comparison

José Lucas Safanelli ORCID logo , José Alexandre Melo Demattê ORCID logo , Natasha Valadares dos Santos ORCID logo , Jorge Tadeu Fim Rosas ORCID logo , Nélida Elizabet Quiñonez Silvero ORCID logo , Benito Roberto Bonfatti ORCID logo , [...]

24/Nov/2021

ABSTRACT Multitemporal collections of satellite images and their products have recently been explored in digital soil mapping. This study aimed to produce a bare soil image (BSI) for the São Paulo State (Brazil) to perform a pedometric analysis for different geographical levels. First, we assessed the potential of the BSI for predicting the surface (0.00-0.20 m) and subsurface (0.80-1.00 m) clay, iron oxides (Fe 2 O 3 ), aluminum (m%) and bases saturation (V%) contents at the state level, which […]

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