Interpolation Numerical methods 5 B splines 4 Mean square error 4 Biogeochemistry 3 China 3 Conservation 3 Curve fitting 3 Decision trees 3 Forestry 3 Inverse problems 3 Linear Interpolation 3 Machine learning 3 Organic compounds 3 Soil organic matters 3 Soil surveys 3 Soils 3 machine learning 3 Agriculture 2 B spline curve 2 B-spline 2 Biodiversity 2 Computer aided design 2 Cubic spline 2 Ecosystems 2 Estimation 2 Forecasting 2 Image enhancement 2 Interpolation method 2 Lagrange multipliers 2