Tag Archives | Mineral Nutrition

After reading this article you will learn about night soil, sewage and sludge. Night Soil: Night soil is human excreta, which is very rich in plant nutrients. Agricultural chemists have found that fresh human faeces contain about 1.5 per cent N, 1.1 per cent P2O5, 0.5 per cent K2O and 1.0 per cent CAO. Although […]