03142nab a2200313 i 4500003000900000005001700009008004100026040001800067072001400085100004000099100003100139100002700170100003300197100003100230100003900261100002800300245015100328500007000479520186600549650001102415650002802426650002502454650002202479650003502501773018602536856007902722942000802801999001902809BR-BrBNA20250319140654.0250319b2020    bl.ar|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aP33b2120  aSandoval, Fábio Henrique Barbosa   aSouza, Zigomar Menezes de   aLima, Elizeu de Souza   aSilva, Reginaldo Barbosa da   aOliveira, Ingrid Nehmi de   aEsteban, Diego Alexander Aguilera   aLovera, Lenon Henrique   aStructural quality and load-bearing capacity of an Ultisol (Argissolo Vermelho amarelo) in mechanized coffee areas with different deployment times  aPublicação on-line; 46 ref.; 4 illus; 5 tables; Sumaries (En)  a

ABSTRACT: The mechanized management systems used in Brazilian coffee plantations generate heavy machine traffic and lead to the application of loads on the soil that affect the soil structure and lead to widespread compaction. This study aimed to evaluate the influence of mechanized operations on coffee plantations with different deployment times on the soil structural quality of an Ultisol, based on its soil physical properties and soil load-bearing capacity. The experiment was carried out in Muzambinho, São Paulo State, Southeast Brazil, in coffee plantations (Coffee arabica L.) with 3, 16, and 32 years of service. In each area, corresponding to the coffee plantation’s establishment period, soil samples were collected in the planting row (R), under the coffee canopy (UCC), and inter-row center (IRC) at the layers of 0.00-0.10, 0.10-0.20, and 0.20-0.40 m to evaluate soil penetration resistance, bulk density, porosity, wet aggregate stability, and preconsolidation pressure, to model soil load-bearing capacity. The deployment time of the coffee crop was a decisive factor in reducing the deterioration of the soil structure in the row, which was confirmed by better structural quality in the plantations with 16 and 32 years of establishment. rrespective of crop deployment time, the effects of intensive machinery traffic on the coffee crop in the middle between the rows and in the area under the canopy are similar, resulting in high soil compaction, reflected in soil penetration resistance, soil bulk density, macroporosity, and load-bearing capacity. The longer the deployment time of the coffee cultivation areas (32 and 16 years), the higher the stability of the soil aggregates, and the larger the mean aggregate size.

Keywords: machinery traffic, preconsolidation pressure, soil properties, uniaxial compression, soil compaction.  aCAFÉ  aCOMPACTAÇÃO DO SOLO  aMÁQUINA AGRÍCOLA  aANÁLISE DO SOLO  aPROPRIEDADE FÍSICO-QUÍMICA0 08089345421dViçosa-MG Sociedade Brasileira de Ciência do Solo 1977o2024-5955tRevista Brasileira de Ciência do Solo (Brazil)x0100-0683gv. 44 p. 1-19 ; (2020)wBR2024004919  uhttps://www.scielo.br/j/rbcs/a/kQ4JdGydfJmRyCd3xBdhHdS/?format=pdf&lang=en  cANA  c330527d330527