SPATIAL VARIABILITY OF SOIL RESISTANCE TO PENETRATION IN NO TILLAGE SYSTEM

A study about the spatial variability of data of soil resistance to penetration (RSP) was conducted at layers 0.0-0.1 m, 0.1-0.2 m and 0.2-0.3 m depth, using the statistical methods in univariate forms, i.e., using traditional geostatistics, forming thematic maps by ordinary kriging for each layer of the study. It was analyzed the RSP in layer 0.2-0.3 m depth through a spatial linear model (SLM), which considered the layers 0.0-0.1 m and 0.1-0.2 m in depth as covariable, obtaining an estimation model and a thematic map by universal kriging. The thematic maps of the RSP at layer 0.2-0.3 m depth, constructed by both methods, were compared using measures of accuracy obtained from the construction of the matrix of errors and confusion matrix. There are similarities between the thematic maps. All maps showed that the RSP is higher in the north region.

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VARIABILIDADE ESPACIAL DE PLANTAS DANINHAS NUM LATOSSOLO VERME- LHO SOB SISTEMA PLANTIO DIRETO. / SPATIAL VARIABILITY OF WEEDS OF AN RED LATOSOL (OXISOL) UNDER NO- TILLAGE SYSTEM.

Revista Brasileira de Engenharia de Biossistemas ◽

10.18011/bioeng2008v2n3p273-281 ◽

2008 ◽

Vol 2 (3) ◽

pp. 273

Author(s):

JOSILENE P. DE OLIVEIRA ◽

LUCAS F. BATISTA ◽

GLÉCIO M. SIQUEIRA

Keyword(s):

Spatial Variability ◽

No Tillage ◽

Tillage System ◽

Red Latosol

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Amostral Optimization of Mechanical Resistance to the Penetration of a Yellow Oxisol Under Pasture

Journal of Agricultural Science ◽

10.5539/jas.v10n9p275 ◽

2018 ◽

Vol 10 (9) ◽

pp. 275 ◽

Cited By ~ 1

Author(s):

Fabiane Pereira Machado Dias ◽

Ésio de Castro Paes ◽

Flávia de Jesus Nunes ◽

Ana Carolina Rabelo Nonato ◽

Neilon Duarte da Silva ◽

...

Keyword(s):

Spatial Variability ◽

Soil Type ◽

Penetration Resistance ◽

Root Penetration ◽

Mechanical Resistance ◽

Northeast Brazil ◽

Soil Resistance ◽

Soil Penetration Resistance ◽

Pasture Area ◽

Resistance To Penetration

The degradation of pastures can be characterized by several factors, mainly due to the management adopted, so in view of the country’s territorial extension and the peculiarity of each region and soil type, it is essential to develop research to improve the monitoring of the system. The objective of this study was to evaluate the effect of different sample densities to establish a mesh that gives precision in maps of spatial variability of soil mechanical resistance to root penetration to pasture areas in the coastal tableland region of Northeast Brazil. In a pasture area, three sampling meshes were demarcated for georeferenced evaluation of soil mechanical resistance to root penetration: mesh 1 established in the dimensions of 50 × 50 m, mesh 2 of 100 × 100 m and mesh 3 of 150 × 150 m, totaling an area of 9 ha. The soil resistance to penetration was measured using an automated apparatus, coupled to a tractor. The variation found in the values of penetration resistance in subsurface can be related to the management adopted in the area, as well as the trampling of the animals. Data on soil penetration resistance in pasture showed that the most compacted zone was always below 30 cm depth by using different sample densities. The results allow us to conclude that the higher the density of the sampling mesh, the greater the accuracy of the data and that, independently of the sample mesh, it was possible to identify the layer of higher soil mechanical resistance to root penetration.

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Spatial variability of soil penetration resistance in the lowland area cultivated with soybean

Ciência Rural ◽

10.1590/0103-8478cr20200452 ◽

2021 ◽

Vol 51 (6) ◽

Author(s):

Edgar Salis Brasil Neto ◽

Alexandre Russini ◽

Lúcio de Paula Amaral ◽

Paulo Jorge de Pinho ◽

Marcelo Silveira de Farias ◽

...

Keyword(s):

Spatial Variability ◽

Penetration Resistance ◽

Soil Resistance ◽

Soil Penetration Resistance ◽

Lowland Area ◽

Linear Correlation Analysis ◽

Different Depths ◽

Resistance Data ◽

Resistance To Penetration ◽

Descriptive Statistical Analysis

ABSTRACT: This study determined the spatial variability of soil penetration resistance and yield of the soybean crop in lowland areas. The soil resistance to penetration at four different depths (0 to 0.10 m; 0.11 to 0.20 m; 0.21 to 0.30 m and 0.31 to 0.40 m), volumetric humidity of the soil at two depths (0 to 0.20 m and 0.21 to 0.40 m) and soybean yield were determined in an area of 1.13 hectares, using a sample mesh of 10 x 10 m. The corresponding data were subjected to descriptive statistical analysis. Pearson’s simple linear correlation analysis (p≤0.05) was conducted and the spatial dependence was assessed by analyzing the isotropic semivariograms using spherical, exponential, linear, and Gaussian models. The results showed that the soil penetration resistance increased with depth, with restrictive values to root growth between 0.05 and 0.35 m. There was no correlation between yield and soil penetration resistance, and the semivariograms did not show a defined ascending region regarding the soil penetration resistance data. For the conditions under which the experiment was conducted, the sample 10 x 10 m mesh was suitable for assessing the spatial variability of soil resistance to penetration in depths exceeding 0.10 m.

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DESEMPENHO DE CULTIVARES DE FEIJOEIRO IRRIGADO NO ECÓTONO CERRADO-AMAZÔNIA

Nativa ◽

10.31413/nativa.v7i3.6494 ◽

2019 ◽

Vol 7 (3) ◽

pp. 244

Author(s):

Matheus Bortolanza Soares ◽

Joaquim Pedro De Lima ◽

Onã Da Silva Freddi ◽

Tauan Rimoldi Tavanti ◽

Renan Francisco Rimoldi Tavanti

Keyword(s):

Phaseolus Vulgaris ◽

Spatial Variability ◽

Soil Fertility ◽

Bootstrap Method ◽

Descriptive Analysis ◽

Limiting Factors ◽

No Tillage ◽

Phaseolus Vulgaris L ◽

Tillage System ◽

Aluminum Saturation

O uso da irrigação por pivô central favorece o cultivo do feijoeiro de terceira safra, contudo, limitações à produtividade são observadas quando cultivados em sistema de semeadura direta, sendo a compactação superficial, incidência de nematoides e variabilidade espacial vertical e horizontal dos nutrientes do solo os principais fatores limitantes deste sistema. O objetivo do estudo foi avaliar o desempenho de cultivares de feijoeiro irrigado em terceira safra, cultivados em sistema de semeadura direta e sua correlação com a fertilidade do solo e incidência de nematoides na região de ecótono Cerrado-Amazônia. O experimento foi desenvolvido no município de Sorriso-MT em um Latossolo Vermelho-Amarelo Distrófico. Os tratamentos foram constituídos por quatro cultivares de feijão, sendo eles: BRS Estilo, BRS Notável, BRS Ametista e BRS Pérola, em uma área total de 9900 m2, onde se determinou através de 83 pontos amostrais georreferenciados os atributos de planta e atributos químicos do solo. Os procedimentos estatísticos utilizados foram: análise descritiva dos dados, análise geoestatística e comparação de médias pelo método “bootstrap”. A maioria dos atributos apresentaram moderada à alta dependência espacial, com elevada variabilidade espacial. O aumento dos teores de potássio gerou incrementos na produtividade, enquanto que o aumento da incidência de nematoides, acidez potencial e saturação de alumínio no solo resultaram em redução. A maior produtividade observada foi da cultivar BRS Pérola, indicando boa aptidão para cultivo nesta região.Palavras-chave: Phaseolus vulgaris L., fertilidade do solo, nematóide, geoestatística. PERFORMANCE OF IRRIGATED BEAN CULTIVARS IN THE CERRADO-AMAZONIAN ECOTONE ABSTRACT: The use of central pivot irrigation favors third-crop bean cultivation, however, productivity limitations are observed when cultivated in a no-tillage system, with surface compaction, nematode incidence and vertical and horizontal spatial variability of soil nutrients, main limiting factors of this system. The objective of this study was evaluate the performance of third-crop irrigated bean cultivars grown under no-tillage system and the correlation with soil fertility and nematode incidence in the Cerrado-Amazonian ecotone region. The experiment was developed in the Sorriso-MT county in a Dystrophic Red Yellow Latosol. The treatments consisted of four bean cultivars: BRS Estilo, BRS Notável, BRS Ametista and BRS Pérola, in a total area of 9900 m2, where soil chemical and plant attributes were determined through 83 georeferenced sampling points. The statistical procedures used were: descriptive analysis of the data, geostatistical analysis and comparison of means by the “bootstrap” method. Most of the attributes presented moderate to high spatial dependence, with high spatial variability. The increase of potassium contents generated increases in productivity, while the increase in the incidence of nematodes, potential acidity and aluminum saturation in the soil resulted in a reduction. The highest productivity observed was of the cultivar BRS Pérola, indicating good aptitude for cultivation in this region.Keywords: Phaseolus vulgaris L., soil fertility, nematode, geoestatistics.

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SPATIAL VARIABILITY OF THE GRANULOMETRIC FRACTIONS AND CHEMICAL ATTRIBUTES OF A SANDY SOIL UNDER A NO-TILLAGE SYSTEM

Journal of Geospatial Modelling ◽

10.22615/2526-1746-jgm-2.1-5889 ◽

2016 ◽

Vol 2 (1) ◽

pp. 67

Author(s):

Osvaldo Guedes Filho ◽

Sidney Rosa Vieira ◽

Glécio Machado Siqueira ◽

Márcio Koiti Chiba

Keyword(s):

Spatial Variability ◽

Sandy Soil ◽

No Tillage ◽

Tillage System ◽

Chemical Attributes

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Spatial variability of weeds in an Oxisol under no-tillage system

African Journal of Agricultural Research ◽

10.5897/ajar2016.11120 ◽

2016 ◽

Vol 11 (29) ◽

pp. 2569-2576 ◽

Cited By ~ 1

Author(s):

Machado Siqueira Gl eacute cio ◽

Alves Silva Raimunda ◽

das Chagas Ferreira Aguiar Alana ◽

Karlla Lima Costa Mayanna ◽

Farias Fran ccedil a e Silva Ecirc nio

Keyword(s):

Spatial Variability ◽

No Tillage ◽

Tillage System

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Effect of Cover Crops Associated With Lettuce Production Under No-Tillage System

Journal of Agricultural Science ◽

10.5539/jas.v14n1p78 ◽

2021 ◽

Vol 14 (1) ◽

pp. 78

Author(s):

Indiamara Marasca ◽

Erení da Silva de Jesus ◽

Murilo Martins Batistuzzi ◽

Matheus Vinicius Abadia Ventura ◽

Rose Luiza Moraes Tavares ◽

...

Keyword(s):

Cover Crops ◽

Biological Properties ◽

Soil Resistance ◽

No Tillage ◽

Straw Decomposition ◽

Fallow Soil ◽

Sunn Hemp ◽

Tillage System ◽

Lettuce Yield ◽

The University

The use of cover crops has benefits for the chemical, physical and biological properties of the soil. However, together with the need for good vegetable productivity, considerable challenges arise in several regions of Brazil. The preparation of conventional soil for initiating no-tillage systems is necessary to create a management history and assimilate the benefits of the no-tillage system in vegetables, ensuring sustainable production. The objective of this research was to evaluate lettuce yield as a function of different cover crops as a function of resistance to soil penetration. The experiment was conducted in the horticulture sector of the University of Rio Verde, Rio Verde, Goiás, Brazil. The cover crops used were sunflower (Helianthus annuus), sunn hemp (Crotalaria juncea), and fallow, and the vegetable used was lettuce (Lactuca sativa). The variables analyzed were plant height and lettuce yield, straw decomposition, and soil resistance to penetration. The collected data were submitted to analysis of variance, and if significant, was compared by Tukey test (p < 0.05) and regression analysis. The lettuce height in the different management systems showed no statistical differences. The decomposition of the straw presented accentuated degradation for the evaluated cover crops and the productivity was bigger in the straw of crotalaria and fallow. Soil resistance for cover crops was not greater than 2 MPa.

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OFF-SEASON STRATEGIES TO IMPROVE SOIL PHYSICAL ATTRIBUTES IN A NO-TILL SYSTEM IN THE BRAZILIAN CERRADO

Revista Brasileira de Milho e Sorgo ◽

10.18512/rbms2020v19e1183 ◽

2020 ◽

Vol 19 ◽

pp. 13

Author(s):

RANIER VIEIRA FERREIRA ◽

ROSE LUIZA MORAES TAVARES ◽

SILVIO VASCONCELOS PAIVA FILLHO ◽

INDIAMARA MARASCA ◽

ALESSANDRO GUERRA SILVA

Keyword(s):

Dry Matter ◽

Block Design ◽

Soil Bulk Density ◽

No Tillage ◽

Brazilian Cerrado ◽

No Till ◽

Randomized Complete Block Design ◽

Tillage System ◽

Physical Attributes ◽

Resistance To Penetration

In the central region of Brazil, sorghum and maize are considered viable crop alternatives to be cultivated during off-season periods, mainly for the production of grains in succession to the cultivation of soybeans and intercropping with brachiaria grasses. This study aimed to evaluate the physical soil qualities of the soil from an area with different off-season management histories (monoculture or agricultural intercropping). Maize, sorghum and brachiaria crops have been cultivated under no-tillage system. The experiment was conducted using a randomized complete block design, with four replications. The treatments included: monoculture or intercropping between sorghum and brachiaria (first off-season strategy) or maize and brachiaria (second off-season strategy). The following physical properties of the soil were evaluated: soil bulk density, porosity, soil resistance to penetration, soil moisture and texture and the contents of organic carbon, which were analyzed at 0-20, 20-40 and 40-60 cm deep. In the off-season, the cultivation of single brachiaria promoted a greater amount of dry matter when compared with sorghum- brachiaria or maize-brachiaria intercropping. The topsoil presented better physical quality when compared with the adjacent layers under no-tillage system. The use of brachiaria combined with sorghum or maize tends to improve the macro and microporosity of the soil.

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