ELECTRONIC CONTROL, MONITORING, INFORMATION SENSING AND INFORMATION DISPLAY SYSTEMS FOR USE IN AGRICULTURAL MACHINERY, COMPRISING COMPUTER HARDWARE, ELECTRICAL CONTROLLERS, ELECTRICAL AND OPTICAL SENSORS; AGRICULTURAL VEHICLE MOUNTED ELECTRONIC CROP ANALYSIS SYSTEMS COMPRISING COMPUTER HARDWARE, COMPUTER SOFTWARE FOR ANALYZING VOLUMES OF CROPS COLLECTED AND DYNAMICALLY CONTROLLING AMOUNTS AND TYPES OF FERTILIZER AND OTHER CHEMICAL COMPOUNDS TO BE APPLIED TO SPECIFIC GEOGRAPHIC AREAS; ELECTRONIC CONTROL, MONITORING, INFORMATION SENSING AND INFORMATION DISPLAY SYSTEMS COMPRISING A COMPUTER OPERATING IN CONJUNCTION WITH AGRICULTURAL MACHINERY MOUNTED TO AGRICULTURAL COMBINE HARVESTERS, AGRICULTURAL TRACTORS, AGRICULTURAL IMPLEMENTS, AGRICULTURAL MACHINES, AND AGRICULTURAL HARVESTING MACHINERY; FIELD DATA COMMUNICATION SYSTEMS FOR AGRICULTURAL APPLICATIONS COMPRISING COMMUNICATIONS SERVERS AND COMMUNICATIONS SOFTWARE FOR CONNECTING COMPUTER NETWORK USERS TO THE COMMUNICATIONS SERVERS; SOFTWARE FOR THE PRESENTATION, MANAGEMENT, AND ANALYSIS OF AGRICULTURAL DATA, FOR USE BY FARMERS; VARIABLE-RATE IRRIGATION CONTROL SYSTEMS AND GPS GUIDANCE AND AUTO STEERING SYSTEMS FOR AGRICULTURAL APPLICATIONS; SENSORS AND CONTROLS FOR AGRICULTURAL APPLICATIONS FOR YIELD MAPPING, SOIL SAMPLING AND VARIABLE RATE SPRAYING, SPREADING AND SEEDING; AND DATA TRANSFER HARDWARE TO TRANSFER DATA EITHER MANUALLY OR ELECTRONICALLY BETWEEN COMPUTERS FOR AGRICULTURAL APPLICATIONS