ABSTRACT: The construction of the hydroelectric power plant Ilha Solteira, in state São Paulo, was initiated 1960s, when an average, 8.60 m soil depth removed, resulting a degraded area. A plan for recovery area started 2005 Selvíria /MS with use species adapted to Cerrado biome. This study aimed evaluate macrofauna under by using different types cover (1- bare (control); 2- native vegetation; 3- specie Astronium fraxinifolium; 4- fraxinifolium + Canavalia ensiformis; 5- Raphanus sativus; 6-...

ABSTRACT In precision agriculture, accurate delineation of management zones and understanding spatial variability soil properties crop yields are critical for optimizing resource allocation improving productivity. Spatial different environmental factors (soil plants) is evident in several studies. Associations between the texture chemical cowpea yield have been tested, but a large, unexplained variance ranges kriged maps usually reported. This suggests that deeper exploration into these...

The Random Forest algorithm is a data mining technique used for classifying attributes in order of importance to explain the variation an attribute-target, as soil CO2 flux. This study aimed identify prediction flux variables management systems sugarcane through machine-learning called Forest. Two different areas state São Paulo, Brazil, were selected: burned and green. In each area, we assembled sampling grid with 81 georeferenced points assess automated portable gas chamber measuring...

Soil CO2 emissions are regarded as one of the largest flows global carbon cycle and small changes in their magnitude can have a large effect on concentration atmosphere. Thus, better understanding this attribute would enable identification promoters development strategies to mitigate risks climate change. Therefore, our study aimed at using data mining techniques predict soil emission induced by crop management sugarcane areas Brazil. To do so, we used different variable selection methods...

Humic substances result from the degradation of biopolymers organic residues in soil due to microbial activity. The objective this study was evaluate influence three different ecosystems: forest, pasture and maize crop on formation humic relating their biological chemical attributes. Microbial biomass carbon (MBC), respiratory activity, nitrification potential, total carbon, soluble fulvic acid fractions rate degree humification were determined. Organic contents decreased order: forest >...

Because of the great importance sugarcane in Brazilian agricultural sector, this study was developed order to evaluate soil CO2 flux and microbial activity systems burned green sugarcane. For end, three areas were evaluated with different histories management: (1) BS); (2) for 5 years (GS-5); (3) 10 (GS-10), considering that both converted from a scenario prior burning before harvest. The (FCO2), basal respiration (BR), carbon biomass (CMB), metabolic quotient (qCO2) (qMIC) 30 points 100 × m...

The sugarcane green harvest system, characterized by mechanized harvesting and the absence of crop burning, affects soil quality increasing residue on surface after harvest; thus, it contributes to improving physical, chemical, microbiological properties influences carbon content CO2 flux (FCO2). This study aimed evaluate spatial temporal variability FCO2 in systems. experiment was conducted two areas São Paulo, Brazil: first had a 5-year history (SG-5) second longer 10 years (SG-10). were...

Modern agriculture faces the challenge of increasing production without expanding cultivated areas, promoting sustainable practices that ensure food security and environmental preservation. Integrated crop-livestock systems (ICLSs) stand out as an effective strategy, diversifying intensifying agricultural in a manner, ensuring adequate soil cover, improving nutrient cycling efficiency. Thus, this study aimed to explore compare integrated with Zuri guinea grass (

Intensive pig farming is an important economic activity and generates a large amount of liquid manure as by-product, which considered promising resource for the fertilization tropical soils, characterized low natural fertility. In agricultural area under no tillage soybean-corn cropping system, located in southwest Brazil, experiment was carried out with different forms fertilization; that is, organic (17 years) at rates application mineral fertilization. Regarding rate, yearly carbon load...

Soil use and management practices influence the quantity quality of soil organic matter (SOM). From this perspective, objective work was to evaluate carbon stock SOM fractions in a no-tillage (NT) crop–livestock integration (CL) system Cerrado biome. The treatments were divided into four areas, subdivided an area under NT with 11 years cultivation, two areas CL 5 or 10 native vegetation (NV). Undisturbed disturbed (Ferralsols) samples collected layers 0.0–0.1, 0.1–0.2, 0.2–0.4, 0.4–0.6 m for...

Sugarcane management systems affect soil attributes such as the carbon cycle. This fact has stimulated sugar and alcohol industry to refine sugarcane production by replacing pre-harvest burning (PB) manual harvest with mechanized harvesting followed residue deposition. The aim of this study was evaluate different respect C cycling dioxide parameters (chemical, physical biological) which were determined over season. Three cultivation evaluated at following periods: (a) PB, (b) 5-year green...

The harvesting system of green sugarcane, characterized by mechanized and no crop burning, affects soil quality increasing the remaining straw left on surface after harvesting, thus, contributing to improvement physical, chemical, microbiological attributes, influencing CO2 fluxes. This study aimed evaluate fluxes their relation properties in sugarcane crops under different managements: burned (B), Green for 5 years (G-5) ten (G-10). For this, a 1 ha sampling grid with 30 points was...

The need to put into practice sustainable agricultural production systems has been supported by agroecology science that seeks optimize land use food with the lowest impact on soil. This study evaluated soil quality, based physical and chemical attributes, in agroforestry (AGF) silvopastoral (SILVP) developed for large-scale production. was carried out municipality of Itirapina, state São Paulo, two areas AGF SILVP system, compared an area a forest fragment another pasture Quartzipisamment...

The use of no-till conservationist agricultural systems as well intercropping in the Cerrado biome are practices that increase soil organic matter (SOM) due to deposition straw. This study aimed quantify carbon stock and fractions a latosol under off-season monoculture (Sorghum bicolor Urochloa ruziziensis) (S. bicolor-U. systems, Rio Verde, state Goiás, Brazil. Soil samples were collected from different layers: 0-10, 10-20 20-40 cm. following variables determined: content, stock, dry...

ABSTRACT Mechanized sugarcane harvest is replacing the historic practice of field burning, due to environmental concerns particulate and emissions during burning. However, impact these practices on soil greenhouse gas (GHG) production potential not fully known. Thus, present work quantified production, in 1 g soil, gases three systems management. The were: area with a history burning before (B) another two management “green sugarcane” periods implantation - 5 (G-5) 10 years (G-10). A...

This study aims to assess the carbon stock in a pasture area and fragment of forest natural regeneration, given importance agroforestry systems mitigating gas emissions which contribute greenhouse effect, as well promoting maintenance agricultural productivity. Our other goal was predict stock, according different land use systems, from physical chemical soil variables using Random Forest algorithm. We carried out our at an Entisols Quartzipsamments with completely randomized experimental...

Soil compaction negatively impacts soil physical functions, affecting root growth and crop yield. This study aimed to evaluate different soybean cultivars' agronomic physiological performance as a function of in Rhodic Ferralsol under no-tillage (NT) with clay loam texture the Brazilian Cerrado biome. The experiment was implemented Rio Verde, Goias state, central Brazil. experimental design randomized block 3x2 factorial scheme six replications. first factor corresponded three cultivars from...

The change in land use and the expansion of mechanized sugarcane production systems have led to an increase soil compaction levels. Preconsolidation pressure may be used as a useful measure for mechanical state, management, planning mechanization systems. This study aimed assess compressive behavior, physical properties, spatial variability preconsolidation Oxisol fields under burned harvest effects change. attributes (granulometry, water content, bulk density, total porosity, macro...

Archaeological Dark Earth (ADE) soils are rich in organic matter and highly fertile, but when used for farming or grazing activities, they generally lose chemical physical quality, becoming more susceptible to erosion. In this context, study aimed evaluate the changes properties of soil different management systems adopted ADE areas Amazon. The area is located municipality Novo Aripuanã, mesoregion Madeira, south state Amazonas. Three were selected: 1—native forest (Amazon fragment); 2—area...

Given the growing demand for grains cultivation in off-season, an experiment was conducted to evaluate grain yield and nutrient accumulation straw, straw production, decomposition of pearl millet varieties hybrids cultivated at different sowing times off-season municipality Rio Verde, state Goiás. This a randomized block experimental design, with four replications planting times. The work carried out on Oxisol, using two forage varieties, ADR300 ADR500, dual-purpose hybrid ADR8010 biomass...

The objective of this study was to evaluate the straw decrease bulk density sandy clay loam and soils determine effect on development soybean maize plants. were compacted using Proctor test with different amounts crushed soil surface corresponding 0, 3, 6, 9 12 t ha−1. After this, in pots same levels its maximum each soil. Then, sown after 42 days, biometric characteristics physiological parameters evaluated. results showed that critical moisture for 1.51 m−3 0.15 kg kg−1, respectively,...

The objective of this work was to monitor the temporal variation penetration resistance (PR) after soil saturation under different management systems in Cerrado biome three areas: two no-tillage (NT with 3 and 10 years implantation) one crop-livestock integration (CL 9 soybean/forage succession. Four transects were delimited each area. area saturated PR measurements performed daily for 11 days at points transect, up 0.40 m depth. Soil moisture determined together measurements, addition...

The objective was to evaluate agronomically and economically the use of fertigation, sources doses NPK in production quality watermelon. experiment conducted under field conditions, with two (Farm Test) used fertirrigation at 300, 600 900 L ha-1, plus an additional control which plants were not fertirrigated. In economic part, operating cost gross net revenues calculated. There effect fertilizers on peel thickness titratable acidity, test standard increased value these variables, influenced...