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.
Key points. 1  Soil fertility depends on three major interacting components: biological, chemical and physical fertility. 2  Soil organisms improve soil fertility by performing a number of functions that are beneficial for plants. 3  Some management practices may help improve and maintain the biological fertility of soil. Releasing nutrients from organic matter Soil microorganisms (figure 1) are responsible for most of the nutrient release from organic matter.