“When we started in 2011 to load biochar with high amounts of liquid NP-fertilizer and tested them in pod trials, we could prove reduced nutrient leaching after simulated strong rain events. When we planted a second culture (paprika after radish) in the same pods without additional fertilization, plant growth was significantly improved in the biochar treatments (see image). From an economic point of view, the difference in growth might have been not relevant as some additional fertilization would have been cheaper than the price of biochar that saved some mineral fertilizer. However working with low amounts of nutrient enhanced biochar [1 t per hectare] applied as slow release fertilizer close to the roots every year seems very promising when viewed from both an economic and ecological perspective. ” Ithaka Institute