METHODOLOGY EVALUATION OF PIN MICRORELIEF METER

Mariana C Melo,Laene F Tavares,Rodrigo R Silva,Thaísa F Oliveira,Alberto Carvalho Filho

doi:10.1590/1809-4430-eng.agric.v37n5p1056-1061/2017

Mariana C Melo, Laene F Tavares + Show 3 more

Open Access

https://doi.org/10.1590/1809-4430-eng.agric.v37n5p1056-1061/2017

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Abstract

The effects of natural weathering and different managements performed in agriculture, may best be understood by studying the soil roughness. This work was conducted in order to evaluate the optimization of the use of pin microrelief meter, an instrument used to determine the soil surface roughness, as the number of readings collected over traditional methodology proposed in the literature. The study was conducted in Rio Paranaiba (MG), in a Dystrophic RED-YELLOW LATOSOL. The experimental design was completely randomized in a 2x3 factorial design with four replications. There were combined two types of primary tillage (disc plow and harrow) and three amounts of readings (100, 200, and 300 reading points). Independently of the soil tillage, disc plow and harrow, the collection of 100 readings using a pin microrelief meter of a square meter, was sufficient to determine the surface roughness before and after soil preparation, without accuracy loss compared with the traditional method.

Highlights

Among the main agricultural equipments used by most properties in Brazil for conventional tillage stand out the disk plow and harrow
The knowledge of micro relief or soil surface roughness can generate important information for interpretation of the effects caused by both human activities in function of the management adopted in the area (Panachuki et al, 2011; Panachuki et al, 2015), as by natural inclement weather as the climate, highlighting the need of studies to determine this parameter (Dalla Rosa et al, 2012; Tuo et al, 2016)
Most part of the studies found in the literature that aimed evaluate this parameter are based on the methodology proposed by Allmaras et al (1966) and described by Gamero & Benez (1990), which indicate the collection of 200 readings through a pin microrelief meter with coverage of one square meter area

Summary

Introduction

Among the main agricultural equipments used by most properties in Brazil for conventional tillage stand out the disk plow and harrow. Studies that aim the improvement of the pin microrelief meter utilization in the field become necessary, given the importance of the micro relief determination, especially in periodically managed areas by soil tillage equipments.

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