1.As per WAPDA guidelines, what is the maximum allowable ECe value for salt-free soil?
2.What is the precise chemical formula of Diammonium Phosphate (DAP) fertilizer?
3.Nitrification is the microbial process responsible for converting which form of nitrogen in the soil?
4.Which device is commonly used to detect radiation through the darkening of photographic film or direct measurement?
5.What is the nutrient composition of the commercial complex fertilizer Nitrophos?
6.Which reagent is commonly used for extracting humic substances from soil samples?
7.Who is credited with defining humic acid?
8.Which of the following substances decomposes at the slowest rate?
9.Which group of fungi is most commonly known for being saprophytic and widely distributed?
10.Which of the following bacteria is responsible for carrying out fermentation?
11.Which of the following are considered examples of microbiota?
12.Which types of soils are commonly present in Pakistan?
13.What term describes the duration that water and ions stay close together in a given area?
14.What percentage of the world's cultivable land is made up of acidic soils?
15.What gases are released from synthetic urea during its decomposition?
16.What is the minimum permanent wilting point percentage typically observed in clayey soils?
17.Which of the following compounds are considered secondary air pollutants?
18.Which category do chitin and steroids belong to?
19.What type of soil is characterized by a saturation extract electrical conductivity exceeding 4 dS/m, an exchangeable sodium percentage (ESP) below 15, and typically has a pH value under 8.5?
20.What term is used to describe the measure of how acidic or basic a liquid or soil sample is?