Recently, I read that wood mulches can deplete the soil of nitrogen as they break down. Is this true? If so, what can I add to the soil to compensate for this nitrogen depletion? Or is there another ...

As many know, healthy, nutrient-rich soil supports a productive vegetable garden. Nitrogen (N), phosphorus (P), and potassium (K) are the key macronutrients required by plants for their growth. When ...

Fritz Haber: good guy or bad guy? He won the Nobel Prize in Chemistry in 1918 for his part in developing the Haber-Bosch process, a method for generating ammonia using the nitrogen gas in air. The ...

A more efficient way to extract fertiliser from human urine could help make better use of wastewater in cities and farms, without exacerbating global warming. Human urine is rich in compounds useful ...