"THE OUTCOME OF HERMANA PROPOSAL WILL BE A DIAGNOSTIC TOOLSET THAT WILL ALLOW TO KNOW IN SPACE AND TIME DEMANDS FOR WATER AND NITROGEN FERTILIZATION OF THE CROP, SO YOU CAN BETTER ADJUST WATER AND NUTRIENT INPUT TO THE CROP�S SPATIALLY AND TEMPORALLY VARYING REQUIREMENTS. THIS IS EXPECTED TO HELP OPTIMIZE YIELD THROUGH INCREASED WATER AND NUTRIENT USE EFFICIENCIES. WE ARE PROPOSING A COMBINED METHODOLOGY, USING EARTH OBSERVATION (EO) IN ORDER TO GENERATE IN REAL TIME MAPS OF CROP WATER AND NITROGEN REQUIREMENTS AND OF BIOMASS AT THE SPACE-TIME RESOLUTION REQUIRED FOR PRECISION FARMING AND TO TRANSMIT THESE TO THE USERS FOR OPERATIONAL USE. FOR THE SCOPE OF THIS PROPOSAL, THE VALIDATION WILL FOCUS ON THE MAJOR CROPS, I.E., GRAIN CEREALS SUCH AS WHEAT, RAINFED AND IRRIGATED, AND CORN. THIS PROPOSAL AIMS AT ESTIMATING CROP WATER AND NITROGEN FERTILIZATION REQUIREMENTS FROM MULTISPECTRAL IMAGERY THAT DESCRIBES THE GROWING CYCLE, JOINTLY WITH METEOROLOGICAL DATA. BASIS OF CROP GROWTH MODELS (CGM) RELATE THE ACCUMULATION OF BIOMASS WITH THE PROCESS OF TRANSPIRATION AND ABSORPTION OF SOLAR RADIATION. THE BASIC HYPOTHESIS UNDER STUDY IS THAT THE INTEGRATION OF SPECTRAL RESPONSE DATA FRO EARTH OBSERVATION INTO CGM PROVIDES THE BEST ESTIMATE OF THE TIME AND SPACE EVOLUTION OF BIOMASS ACCUMULATION, AS WELL AS, IN A SUBSEQUENT STEP, OF YIELD AND PRODUCTION. THE EVOLUTION OF BIOMASS IN TURN DETERMINES THE CROP WATER AND NITROGEN REQUIREMENTS, SINCE THE RATE OF ACCUMULATION OF BIOMASS AND DEMANDS ARE INTRINSICALLY RELATED. "