The present invention provides, in some embodiments, a plant fertilizing composition and a method of producing the plant fertilizer. The bottom wall has a top surface and a bottom surface, with the bottom surface facing a heating source and the top surface facing an air space. In this way, the flexible intake manifold runner can be tuned over a wider operating band while maintaining a lower cost design. The halftoning processing module is coupled to the image input module and receives the original image data and the secret image data, performs a first error diffusion process to the original image to generate a first halftone image and performs a second error diffusion process to the original image data and the secret image data to generate a second halftone image. A process modeling language code is generated based on the recognized process semantics.