EFFECT OF FARM MACHINERY ON SOME SOIL PHYSICAL PROPERTIES USING HYPERSPECTRAL DATA

Document Type : Original Article

Authors

1 1Prof. of Agric. Eng. Fac. of Agric. Cairo Univ., Giza, Egypt.

2 Prof. of Soil Sciences. Fac. of. Agric. Cairo Univ., Giza, Egypt.

3 Prof. of Soil Sciences. National Authority for Remote Sensing & Space Sciences, Egypt.

4 Agricultural specialist, National Authority for Remote Sensing & Space Sciences, Egypt.

Abstract

Traditional soil analyses are expensive, time-consuming, and may also result in environmental pollutants. The objective of this study was to develop a methodology to predict soil physical properties specifically the soil bulk density using spectral reflectance (SR) as an alternative to traditional methods. Additionally to critically examine the suitability of Visible and Near-infrared (Vis- NIR) (350–2500 nm) measurements for calibration procedures and methods to predict the value of soil bulk density. Five different seedbed preparation systems were applied. Spectroradiometer ASD was used to measure the soil spectral reflectance of each system. Stepwise multiple linear regression (SMLR) was used to construct calibration models subjected to the independent validation. The obtained regression models were of good quality (R2 = 0.959, 0.868, 0.811, 0.751 and 0.677 for system 5, system 1, system 3, system 4 and system 2, respectively). Thus, Visible and Near-infrared (Vis-NIR) reflection spectroscopy is cost- and time-effective procedure that can be used as an alternative to the traditional methods of measuring soil physical properties. 

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References

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Misr Journal of Agricultural Engineering
Volume 35, Issue 2
April 2018
Pages 395-406

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