Plant Pathology - Study Mode
[#561] When all the five stages are present in the life cycle of rust, it is known as
Correct Answer
(B) Macrocyclic
Explanation
Solution: When all five stages are present in the life cycle of rust, it is known as Macrocyclic. All rusts are obligate parasites, meaning that they require a living host to complete their life cycle. All 5 stages of their life cycle are Pycniospores, Aeciospores, Urediniospores, Teliospores and Basidiospores. The one where all these five stages are present is termed Macrocyclic.
[#562] In tree crops fertiliser is not added near the trunk because of
Correct Answer
(A) Less roots there
Explanation
Solution: In tree crops, fertilizer is not added near the trunk because of fewer roots there. Roots are the part of the plant that absorbs water and mixed solutes and fertilizers from the soil. As the trunk presence of the root is very less, therefore it is advised not to add fertilizers near to trunk of the tree. For trees growing on turf, fertilizer is best applied beneath the root zone of the grass. Punch, drill, or dig small holes 8 - 12" deep evenly spaced around the dripline (about 3 feet apart) and distribute the fertilizer equally among the holes.
[#563] Split application of K is useful in high rainfall areas to save on
Correct Answer
(C) Leaching
Explanation
Solution: Split application of K is useful in high rainfall areas to save on Leaching. Application of potassium in split doses enhanced the enzymatic activities, probably causing higher mobilization of nutrients in soil and plant and translocation of photosynthetic in plant system, which ultimately resulted in higher grain and straw yields. When soil loses essential water-soluble nutrients needed for crop growth due to excessive rain or irrigation, the process is referred to as leaching.
[#564] The scientist to discover photophosphorylation was
Correct Answer
(A) Amon
Explanation
Solution: The scientist to discover photophosphorylation was Amon. In 1954, Daniel I. Arnon et.al. discovered photophosphorylation in vitro in isolated chloroplasts with the help of P32. His first review of the early research of photophosphorylation was published in 1956. In the process of photosynthesis, the phosphorylation of ADP to form ATP using the energy of sunlight is called photophosphorylation.
[#565] Which of the following is nitrogenous fertiliser for amide group?
Correct Answer
(B) Urea
Explanation
Solution: Urea is nitrogenous fertilizer for the amide group. Urea (also known as carbamide or carbonyl diamide) is produced by reacting ammonia with carbon dioxide. It is the most concentrated solid nitrogenous fertilizer, containing 46 percent nitrogen. Roughly 85% of urea solution produced is used in fertilizer mixtures, with 3% used as animal feed supplements and 12% used for plastics and other uses. Urea is marketed as a solution or in solid form.