Herculano's Green Precision project focuses on developing cost-effective, intelligent slurry tankers to enhance fertilization efficiency across environmental, agronomic, and economic dimensions, aligning with Agriculture 4.0 principles. These advanced tankers are equipped with Near Infrared (NIR) sensors that accurately analyse slurry nutrient content, including nitrogen (N), phosphorus (P), and potassium (K), enabling precise nutrient application tailored to specific crop and soil requirements. Additional sensors measure conductivity and temperature, further refining application accuracy. A flow meter informs the system to adjust slurry distribution optimally. Data from these sensors are processed by an onboard processor, which communicates with the operator through an ISOBUS connection or a dedicated console for tractors lacking ISOBUS technology. The system's GPS and GSM connectivity facilitate precise slurry placement and equipment tracking. This precision approach ensures optimal nutrient application, promoting sustainable farming practices and improved crop yields.