The
variability of soil chemical and physical properties must be studied in order
to develop appropriate management practices. Without proper planning, land use
results in soil depletion and low crop yield, resulting in a decline in the
socioeconomic and technological level of the rural population. The purpose of
this research was to assess the spatial variability of soil properties in the
Malhada do Meio settlement in order to subsidize soil use planning. The
settlement is 630.86 ha in size and is located in Chapadinha, MA, Brazil.
Seasonal submontane deciduous forest and steppe savanna dominate the
vegetation. The geology is made up of Itapecuru Formation sandstones and
siltstones, as well as colluvial and alluvial deposits. The relief consists of
hills with rounded and flat tops, an average altitude of 67 m, and ferruginous
duricrusts that are frequently covered over. In Plintossolos, Neossolo, and
Gleissolo, a total of 183 georeferenced soil samples were collected at depths
of 0.00-0.20 m. The chemical variables pH(CaCl2), H+Al, Al, SB, V, CEC, P, K,
OM, Ca, Mg, SiO2, Al2O3, and Fe2O3 were investigated, as well as particle size
variables clay, silt, and sand. There were descriptive statistical and
geostatistical analyses performed. Most variables had a high coefficient of
variation (CV), with the exception of pH, which had a low CV and sand, which
had a medium CV. The exponential and spherical models were fitted to the
experimental semivariograms of these variables. The values ranged from 999 m to
3,690 m. There are three distinct areas for land use planning for the variables
pH(CaCl2), SB, and clay. Due to higher macronutrient content, organic matter,
and pH, the central part of the area (zone III), where the Plintossolos
Pétricos and Neossolos Flvicos occur, is the most suitable for crops. For
environmental preservation, zones I and II are indicated. This study defined
homogeneous areas of soil fertility management at high and low levels.
Author (s) Details
James Ribeiro de Azevedo
Universidade Federal do Maranhão, Centro de Ciências Agrárias e Ambientais,
Chapadinha, Maranhão, Brasil.
Célia Regina Paes Bueno
Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinária,
Departamento de Solos, Jaboticabal, São Paulo, Brasil.
Gener Tadeu Pereira
Universidade Estadual Paulista, Faculdade de Ciências Agrárias e
Veterinária, Departamento de Ciências Exatas, Jaboticabal, São Paulo, Brasil.
View Book :- https://stm.bookpi.org/CRAS-V9/article/view/1461
