1a.Objectives (from AD-416):
Identify marginally productive, salt-affected agricultural lands within the San Joaquin Valley that provide the highest potential for HRJ feedstock production.
1b.Approach (from AD-416):
The project has a four phase approach. Phase 1: initial land assessment with overlay approach using SSURGO data layers. Phase 2: ECa-directed soil sampling for (a) ground truth of Phase 1, (b) detailed site characterization of Phase 3, and (c) calibration of Phase 4; Phase 3: validation of feedstock crop production on marginally productive, salt-affected soils receiving degraded water. Phase 4: incorporation of remote imagery (MODIS) to refine land use assessment map.
Phase 1 has been completed. Phase 2(a) is 75% complete with 15 fields surveyed and sampled. Five additional land owners of fields identified from the initial land assessment completed in Phase 1, remain to be contacted for permission to conduct ECa-directed soil sampling surveys to provide ground truth (i.e., Phase 2a). Phase 2b is 50% complete with a soil electrical conductivity (ECa)-directed soil sampled survey completed and 100% of the detailed soil property characterization completed for one of two feedstock production sites (i.e., two Diener Farm sites).
The relationship of this subordinate project with the main in-house project is related objective 1, research for evaluating a multi-sensor platform (i.e., satellite imagery, Real-time Kinematic Global Positioning System (RTK-GPS), and electromagnetic induction) for mapping salinity and related soil properties. The development of regional-scale salinity assessment methodology for the west side of the San Joaquin Valley from MODIS imagery, RTK-GPS, and electromagnetic induction will provide a practical avenue of evaluating a multi-sensor platform for the creation of soil salinity maps at field scales and larger spatial extents.