Specific Management Areas as a Function of Dendrometric Properties of Eucalyptus and Physical-Chemical Attributes in an Oxisol

Abstract

Eucalyptus cultivation has expanded considerably in Brazil, especially in regions where soils have low fertility, as in the Brazilian Cerrado (Brazilian Savannah). In order to achieve high yield, it is necessary to know the appropriate time and place to perform the soil management, and to assist in this decision-making process, mathematical and computational models has been used and are a promising alternative. The objective of this study was to model the influence of plant and soil physical-chemical attributes on Eucalyptus camaldulensis cultivation in an Oxisol (Latossolo Vermelho distrófico), with clayey texture with the purpose of demonstrating specific management areas closely associated with eucalyptus development. An experimental grid of approximately 2 hectares (ha) containing 40 sampling points were installed and later soil and plant attributes were collected for the determination of physical and chemical attributes in the 0-0.20 m and 0.20-0.40 m layers in Selvíria, MS, Brazil. The results were analyzed using classical and geostatistical statistics. The spatial dependence varied according to the physical attribute evaluated and the depth of sampling. In addition to the vertical variability, there was also horizontal variability between depths, since for the same attribute the range was different between the sampled layers.

Contribution of Soil Attributes and Morphological Variables to Yield of Irrigated Garlic

“…There were high and positive correlations between the variables: RP1 x MRP; RP2 x MRP; RP3 x MRP, and RP4 x MRP. Studying the relationships with penetration resistance, Galindo et al, (2018) and Oliveira et al, (2019) also found high and positive correlations between the same variables. These variables also showed high negative correlations with garlic yield (GY).…”

“…Garlic bulbs are rich sources of carbohydrates, proteins, phenols, and antioxidants. Annual global garlic production in 2015/16 was 27 million tons grown in approximately 1.5 million hectares in several countries under different climates (Faostat, 2018).…”

Spatial and temporal variability of soil and plant attributes after application of cellulose residue

“…During a experiment with Eucalyptus camaldulensis, Galindo et al (2018) conducted a spatial variability analysis of dendrometric properties of eucalyptus and physical attributes of a Latosol and found average CV variabilities of 23.3 and 22.9%, respectively. In a similar study, Lima et al (2010) found average TH and DBH values ranging from 12 to 11.8%, respectively.…”

“…The Eucalyptus plant rapid growth and development is a possible explanation to this increase as well as the varied uses of timber and the easy adaption of the tree to different edaphoclimatic conditions. Even so, productivity of commercial eucalyptus farms in Brazil is still quite variable, averaging 60 m³ ha -1 , over seven-year rotations (Galindo et al, 2018).…”

Linear and spatial variability of eucalyptus dendrometric attributes correlated with the properties of a Typic Haplustox soil (Oxisol) in the Brazilian savannah

“…Such an increase can be explained by eucalyptus rapid growth, wood use diversification, and adaptability to different edaphoclimatic conditions. However, the eucalyptus plantation yields in Brazil are still quite variable and may reach an average of 60 m³ ha-1 in a seven-year rotation (Galindo et al, 2018).…”