1.What is the molar concentration of pure water?
2.Typically, roots occupy what proportion of the soil volume?
3.Which fertilizer causes the highest residual soil acidity when applied repeatedly over time?
4.In which type of soil is zinc more readily accessible to plants?
5.What is the role of the nutrient silicon (Si) in plants?
6.Who is credited with introducing the term 'rhizosphere'?
7.Which organic substance is found in the greatest quantity in the natural world?
8.Which method is employed to evaluate the amount of available phosphorus in soil without involving plant cultivation?
9.As per FCO standards, what is the highest allowed total nitrogen content from urea in DAP fertilizer?
10.Which element is recognized as the seventieth essential nutrient in the list?
11.What is the approximate percentage value of Earth's albedo?
12.What term describes the arrangement of a land's surface along with the relationships between its natural and artificial elements?
13.As a soil scientist, can you identify the widely recognized soil science textbook authored by Nyle C. Brady, currently in its 14th edition?
14.Which indicator is commonly utilized to measure the quantity of organic matter or organic carbon?
15.Earlier, it was believed that plants needed sixteen essential nutrients for growth. Currently, how many essential nutrients are recognized as necessary for plant development?
16.Which of the following categories consist of secondary minerals?
17.What is the typical carbon to nitrogen (C:N) ratio found in microorganisms?
18.What is the name given to a group of intrazonal dark calcareous soils that are rich in clay and predominantly contain montmorillonite clay minerals?
19.Which of the following amino acids contain sulfur as a vital element?
20.What are the correct units used to express water diffusivity?