This open access book provides methods for the estimation of Biomass Water Equivalent (BEW), an essential step for improving the accuracy of area-wide soil moisture by cosmic-ray neutron sensors (CRNS). Three techniques are explained in detail: (i) traditional in-situ destructive sampling, (ii) satellite based remote sensing of plant surfaces, and (iii) biomass estimation via the use of the CRNS itself. The advantages and disadvantages of each method are discussed along with step by step instructions on proper procedures and implementation.
Foreword.- Summary.- 2. In-Situ Destructive Sampling.- 2.1 The Concept of Representivity.- 2.2 Plant Sampling Pattern and Design.- 2.3 Biomass Water Equivalent.- 2.4 Conclusions.- 3. Remote Sensing via Satellite Imagery Analysis.- 3.1 Photo-Reflective Properties of Plants.- 3.2 Satellite Image Analysis.- 3.3 Conclusions.- 4. Estimate of Biomass Water Equivalent via the Cosmic Ray Neutron Sensor.- 4.1 The role of Biomass in the CRNS Calibration.- 4.2 Relationship between Neutrons and Crop Biomass.- 4.3 Dire4ct Relationship between Neutrons and Biomass.- 4.4 Conclusions.
