Car tire numbers explained â Tires will have something similar like this printed on the side of it: P215/65R17 95H The first letter means type of tire for certain vehicles. P = Passenger vehicles tire
Integrated Soil Fertility Management (ISFM) technologies have proven to be viable options for improving land productivity and increasing yield. However, adoption of the set of complementary technologies that are required in ISFM is quite variable and studies of adoption focus on single technologies.
Therefore, the fertility of our soils is a critical indicator of the health of our agriculture and of our food, fiber, and fuel production capacity. Assessing Soil Fertility by Soil Tests. This is a report of the phosphorus (P) and potassium (K) fertility of the soils of North America. These two essential nutrients, along with nitrogen (N), are the most frequently limiting nutrients for crop production in North America and throughout the world.