Variable rate technology offers a sustainable, efficient, and cost-effective solution for fertilizer application. A study was conducted to design develop variable applicator detect real-time deficiency of N within the field apply it per requirement crop. The microcontroller system designed receive signal from sensor send pulse-width-modulation valve vary rotational speed hydraulic motor resulti...

A novel control system for variable rate fertilizer application based on CAN bus is presented. The system consists of variable rate controller based on DSP, ground speed sampling unit and light-bar guidance unit. These units form a control area network based on CAN bus. The variable rate controller collects signals of GPS position and ground speed, and calculates the conveyor feed shaft rotate ...

1997). Ferguson et al. (2002) found reduction in soil nitrate concentration due to variable rate fertilizer N High levels of residual soil NO3–N can contaminate ground water application in only 3 out of 12 site-years as compared by leaching through the soil. Our objective was to reduce the level and spatial variability of residual soil NO3–N while maintaining optiwith uniform N application. Mac...