1, with a lid of the oil drum, the rapeseed cake into the amount of oil can be about two-thirds of the height of the drum. Fill it with water, put in a bag of yeast for pasta, and then put in some orange peels (the purpose is to reduce the odor) and then put it outside to ferment, about six months can be diluted with water to use.

2, direct use. A small amount, put into the bottom of the pot, do bottom fertilizer. Pay attention to the amount, and do not directly contact the root system. This method is risky, use with caution.

3, composting bottom fertilizer. The appropriate amount of vegetable cake mixed with soil, watering, sealed compost. High temperature season 3~6 months. If you have the conditions, you can use outdoor mulch pile composting.

4, compost fertilizer or fertilizer alum water. Vegetable cake crushed + ferrous sulfate + water, loaded into containers (Coke bottles, fee old oil jugs), slightly sealed composting 1 ~ 3 months, pouring the upper layer of clear liquid water to water flowers, vegetable cake about 1/3 of the container.