1.Which group primarily drives the early stages of organic matter decomposition?
2.Which device is specifically designed to measure photosynthetically active radiation (PAR)?
3.Who is recognized for discovering the essential role of nitrogen in plant growth?
4.Which type of nitrogen-containing fertilizers is unsuitable for use in waterlogged or flooded soils?
5.How many milligrams of nitrogen correspond to 1 milliequivalent (meq) of HCl?
6.What term is used for organisms that obtain their carbon from atmospheric CO2 and their energy by oxidizing simple inorganic substances?
7.What is the process called when nitrogen is lost as ammonia (NH3) in an alkaline environment?
8.What type of disease is browning disease in rice classified as?
9.When a manure heap is subjected to rainfall, which nutrient is most likely to be lost in the greatest amount?
10.What are the ideal temperature range and pH level for the optimal growth of nitrifying bacteria?
11.Which of the following is the initial process to begin wind erosion?
12.Which indicator is commonly employed to assess the amount of available boron in soil?
13.What causes the negative charges found on silicate clay minerals?
14.Which soil order is marked by intense weathering and a high concentration of iron and aluminum oxide clays, typically found in tropical regions?
15.Which of the following correctly represents the value of 1 bar?
16.Which of the following phosphatic fertilizers is water-soluble?
17.The journal 'Plant and Soil' is published in which country?
18.Which green manure crop is considered the most effective?
19.According to the Walkley-Black procedure for determining organic matter, what percentage of the organic carbon content is typically recovered?
20.How much water corresponds to one hectare centimeter (ha·cm)?