Low-cost microprocessed instrument for evaluating soil temperature profile

Pesquisa Agropecuária Brasileira

Paulo EstevÃo Cruvinel¹ 

[1] ,Embrapa Centro Nacional de Pesquisa e Desenvolvimento de Instrumentação Agropecuária São Carlos SP ,Brazil

关键词: soil management equipment;    thermal properties;    microprocessors;    sensors;    equipamento para manejo do solo;    propriedades térmicas;    microprocessador;    sensores;   

DOI  :  10.1590/S0100-204X2000001100020

来源: SciELO

【 摘 要 】

This paper describes a low-cost microprocessed instrument for in situ evaluating soil temperature profile ranging from -20.0°C to 99.9°C, and recording soil temperature data at eight depths from 2 to 128 cm. Of great importance in agriculture, soil temperature affects plant growth directly, and nutrient uptake as well as indirectly in soil water and gas flow, soil structure and nutrient availability. The developed instrument has potential applications in the soil science, when temperature monitoring is required. Results show that the instrument with its individual sensors guarantees ±0.25°C accuracy and 0.1°C resolution, making possible localized management changes within decision support systems. The instrument, based on complementary metal oxide semiconductor devices as well as thermocouples, operates in either automatic or non-automatic mode.

【 授权许可】

CC BY   
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