Final answer:
A competent person studying soil, such as a soil scientist, would typically conduct multiple tests to assess soil quality and characteristics. These tests include pH testing, nutrient testing, moisture testing, compaction testing, infiltration testing, organic matter testing, salinity testing, cation exchange capacity testing, bulk density testing, and particle size analysis testing.
Step-by-step explanation:
The correct answer is option 4) 10 tests: pH test, nutrient test, moisture test, compaction test, infiltration test, organic matter test, salinity test, cation exchange capacity test, bulk density test, particle size analysis test.
A competent person who studies soil, known as a soil scientist, would typically conduct multiple tests to assess the quality and characteristics of the soil. These tests include pH testing to measure the acidity or alkalinity of the soil, nutrient testing to determine the availability of essential nutrients for plants, moisture testing to evaluate the moisture content of the soil, compaction testing to assess the density and compaction of the soil, infiltration testing to measure the rate at which water can penetrate the soil, organic matter testing to analyze the amount of organic material present in the soil, salinity testing to determine the salt content of the soil, cation exchange capacity testing to assess the soil's ability to retain and exchange nutrients, bulk density testing to measure the mass of the soil per unit volume, and particle size analysis testing to determine the distribution of particle sizes in the soil.