From: Study of the feasibility of a rice husk recycling scheme in Japan to produce silica fertilizer for rice plants
Item
Income (USD)
Remarks
Ash fertilizer sale
46,200 USD = 50 kg h− 1·6 h d− 1·220 d yr− 1·0.7 USD kg− 1
50 kg h− 1: effective silica
6 h d− 1: dairy operation
220 d yr− 1: yearly operation
0.7 USD kg− 1: fertilizer price