Using digital images analysis technique to determine soil organic matter content

پندی, حسین and شعبانی روفچائی, عباس and امینی, میلاد Using digital images analysis technique to determine soil organic matter content. In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

Soil organic matter has been a decisive factor in plant nutrition and organic agriculture, and its determination by indirect methods can greatly reduce the limits of direct measurement (time, cost, materials and Labratory equipment). This research was carried out using soil scans by scanners apparatus (HP series F2400) in soils with different organic matter content (0 to 6.05) in Guilan province. By increasing the percentage of organic matter, the total color codes (R+G+B) decreased due to the relative darkening of the soil. On the proposition contrary, in soils whose organic matter is less than one (dark soils and sandy with low organic matter content), due to the darkness of these soils, their total color codes (R+G+B) by soils with high organic matter be mistaken and caused error. However, after evaluating the total color codes (R+G+B) with the percentage of organic matter of the studied soils, the coefficient of determination was 0.66. According to the results, the images processing method for determination of soil organic matter has been accurate.

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