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- Title
CALIBRACIÓN DE SENSORES DE RESISTENCIA EN LA MEDICIÓN DEL POTENCIAL MÁTRICO EN TRES TIPOS DE SUELOS EN CONDICIONES DE INVERNADERO.
- Authors
Medina-Puente, A.; García-Delgado, M. A.; Varela-Fuentes, S. E.; Ramírez-De-León, J. A.; Ruvalcaba-Sánchez, L. G.
- Abstract
Monitoring water content in the soil is an appropriate tool to increase the efficiency in the application of agricultural irrigation. Modern agriculture and technification of the high-frequency irrigation systems such as those of drip irrigation and micro spraying need fast, precise and automatized measures to monitor the soil moisture content. To achieve this, appropriate and economic techniques, instruments and tools are needed, such as the resistance-tension sensor of soil water potential, Watermark® Model 200SS (Irrometer Company, Inc.) due to its versatility, ease in installation, and measuring exactness of the matrix potential in soil water retention, with more frequent uses of instruments. Several of these sensors were evaluated and calibrated with the gravimetric method under greenhouse conditions to determine their punctual and continuous variation to measure the soil matrix potential (SMP), temperature and variation in three types of soils from different localities; the texture, apparent density, real density, and variation of the moisture content at different tensions were determined in each soil. The moisture contents of the soil measured with the resistancetension sensors were compared to the readings recorded with direct-measurement pressure gauges, the sensors and the gauges were installed at two depths of the soil, of 0.30 and 0.60 m. Resistance-tension Watermark® 200SS sensors were evaluated, compared and analyzed, of continuous measurement of the soil matrix potential and conventional directmeasurement pressure gauges installed on soil sample columns representative of three citrus producing regions in the central area of the state of Tamaulipas. The three equations of logarithmic adjustment from each were highly significant; the best determination coefficient (R2) of 0.9772 was found in the adjustment model of the soil in El Barretal, Tamaulipas.
- Publication
Agro Productividad, 2018, Vol 11, Issue 9, p137
- ISSN
2448-7546
- Publication type
Academic Journal
- DOI
10.32854/agrop.v11i9.1226