Mr. A is a farmer. He tested the soil sample from his field and found out that the soil is deficient in certain nutrients
Answers
Answer:
Soil testing is, and should be, an important component of more comprehensive environmental diagnostic tools. Researchers are attempting to define measurable parameters useful to improve estimates of the relationship between soil-test concentrations and loading rates to water resources. An example of such work is the ongoing international effort to develop better soil-testing procedures (including both methods of analysis and their interpretations) for N and P to identify watershed or field areas likely to contribute significant amounts of N and P to surface water and groundwater through erosion, surface runoff, or leaching. Growing evidence from field research demonstrates a strong relationship between soil-test values and concentrations of elements in surface runoff and subsurface drainage. However, local or regional calibrations are needed, because the relationships vary greatly across soil-test methods and soil properties. Moreover, the effective impact of a certain soil-test value on environmentally sensitive areas is strongly affected by the site hydrology and various transport mechanisms. Thus, if loading rate decisions regarding fertilizers or waste materials are made solely on the basis of soil-test concentrations, erroneous decisions will probably be made regarding potential element losses from fields. However, soil testing plays an important role in optimizing crop production and protecting the environment.
Explanation:
Answer:
Explanation:Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus.
Most people who fall sick with COVID-19 will experience mild to moderate symptoms and recover without special treatment.
HOW IT SPREADS
The virus that causes COVID-19 is mainly transmitted through droplets generated when an infected person coughs, sneezes, or exhales. These droplets are too heavy to hang in the air, and quickly fall on floors or surfaces.
You can be infected by breathing in the virus if you are within close proximity of someone who has COVID-19, or by touching a contaminated surface and then your eyes, nose or mouth.