کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1712534 1013144 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of Ultraviolet, Visible, and Near Infrared Sensing for Soil Phosphorus
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی کنترل و سیستم های مهندسی
پیش نمایش صفحه اول مقاله
Comparison of Ultraviolet, Visible, and Near Infrared Sensing for Soil Phosphorus
چکیده انگلیسی

Identifying the most suitable electromagnetic region is crucial in designing a spectral-based sensor for determining phosphorus (P) concentration. The reflectance of soils in ultraviolet, visible, and near infrared regions was measured. For each spectral region, calibration and validation data sets were obtained using simple randomised sampling. The reflectance and P concentration of soils were used in linear partial least-squares regression (PLS) analysis to predict P concentration of soils. Soils were analysed for water-soluble P, Mehlich-1 P, and total P. Partial least-squares regression results showed that strong relationships were found between reflectance and P concentration with coefficients of determination of 0·93, 0·95 and 0·76 for total, Mehlich-1 and water-soluble P, respectively, in the near infrared region. Good relationships were observed between reflectance and P concentration with coefficients of determination of 0·83, 0·67 and 0·61 for total, Mehlich-1 and water-soluble P, respectively, in the visible region. However, weaker relationships between reflectance and P concentration were observed in the ultraviolet region.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosystems Engineering - Volume 96, Issue 2, February 2007, Pages 293–299
نویسندگان
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