Phosphorus (P) is the second major nutrient essential for plant growth. With the exception of Nitrogen (N) and Potassium (K), Phosphorus is required by plants in_________?
Although some acid soils do exist in the northern mountainous regions of Pakistan (Mansehra, Sawat, Dir). Almost all cultivated soils of the country are ________________, with high base saturation and low organic matter content (generally less than 1%)?