Abstract: Soil pH and macronutrient (Nitrogen, Phosphorus and Potassium) levels are the primary parameters for crop and fertilizer recommendations given to farmers to achieve soil productivity. Soil ...

The phenomenon has delighted and terrified humanity through the ages. Learn about the three different types, what causes them, and how ancient cultures interpreted them. A long exposure telephoto ...

New Year update for OpenCV 4.x has been released.