1.Which atmospheric layer is responsible for absorbing the sun's ultraviolet rays?
2.What is the term used for organic material that has undergone partial decomposition?
3.Which of the following narcotic crops is predominantly cultivated in Pakistan?
4.What is the term for organic material that has undergone extensive decomposition?
5.What is the term for growing the identical crop repeatedly on the same land each year?
6.What is the typical percentage of oxygen present in the Earth's atmosphere?
7.What is the approximate percentage of nitrogen present in the air?
8.In seeds, increased leachate conductivity is most commonly associated with which characteristic?
9.Who was the first to propose using linear measurements of plumule growth as a method to assess seed vigour?
10.In which type of grains is electrolyte leakage observed to be higher?
11.Which factor is considered a potential method to improve productivity?
12.Which type of rice grains is most commonly associated with irregular seedling development?
13.What can cause unusual seedling development in rice plants?
14.At what temperature and duration is heat treatment effective in breaking the seed dormancy of nee seeds?
15.What is the term for the offspring derived from a nucleus seed?
16.Who is credited with developing the formula to calculate the speed of seed germination?
17.Which researchers developed a technique to estimate seed vigor by analyzing the color intensity of stained seeds?
18.Which test demonstrates a positive correlation between germination percentage and viability percentage in wheat, paddy, and maize seeds?
19.Who proposed the technique for assessing seed vigor by evaluating the color intensity of stained seeds?
20.According to Oka (1975), what is the recommended population size for maintaining and producing seeds of a commercial crop from a self-pollinating species?