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41
Quantum yield of Photosynthesis
Discuss
Answer & Solution
Answer: Option B
Solution:
The quantum yield of any radiation-induced process like photosynthesis is the number of times a specific event occurs per photon absorbed by the system. It is a definitive measure of the energetic efficiency of photo autotrophy. It is calculated from light intensity and the rate of photosynthesis. It is approximately 0.08 - 0.12.
42
Which of the following is spreading type variety or groundnut?
Discuss
Answer & Solution
Answer: Option B
Solution:
M-13 is one of the high yielding and spreading types variety of groundnut. The main axis of the plant is very short and erect and it spread horizontally along the ground usually an inch above the ground except at the tips.
43
Green revolution In India was a result of
Discuss
Answer & Solution
Answer: Option D
Solution:
The Green Revolution began in the 1960s initiated by Norman E. Borlaug, during which agriculture was converted into a modern industrial system by the adoption of technology, high yielding variety and dwarf varieties of wheat and rice.
44
Which crop is considered as major oil seed crop in India?
Discuss
Answer & Solution
Answer: Option A
Solution:
Groundnut is a highly grown major oil seed crop in India. Groundnut is mostly a Kharif crop but in addition to hybrid seeds variety is now also sown as a Rabi crop. The annual production of groundnuts is around 7,180.5 thousand tonnes approximately.
45
The oil content in the cotton seed ranges from
Discuss
Answer & Solution
Answer: Option B
Solution:
Almost all the seeds have some oil content in them like wise cotton seeds also have about 15 - 25% of oil content. Oil is extracted from the kernel of the seed. Cotton seed oil is used for salad oil, mayonnaise, salad dressing, and similar products of its flavor stability.
46
During germination radical and plumule develop from
Discuss
Answer & Solution
Answer: Option A
Solution:
An embryo of the seed during germination divides into radicle and plumule. Radicle is the first most emerging part of the growing plant which further develops into root while Plumule is the part from where shoot of the plant is formed.
47
EC of Alkaline soil,
Discuss
Answer & Solution
Answer: Option A
Solution:
Soil electrical conductivity is a measure of the number of salts in soil i.e. salinity of the soil. It is an excellent indicator of nutrient availability and loss, soil texture and available water capacity. The electrical conductivity of alkaline soil is less than 4 ds/m.
48
Which variety of mungbean is suitable for cultivation both during rainy and summer seasons
Discuss
Answer & Solution
Answer: Option B
Solution:
Type-44 (Pusa Baisakhi) was developed in 1962 as a cross between Type-1 × Type-49. The plants of this variety are semi-spreading, medium in height, and pods are 7 - 9 cm long containing 11 - 14 seeds. It is suitable for spring and summer sowing and the average yield is 8 - 10 quintal per hectare.
49
Most common place in a city where the value of altitude for that city is mentioned.
Discuss
Answer & Solution
Answer: Option B
Solution:
The railway station is the most common place in the city where the value of altitude is mentioned for the city. It is mentioned in km from the sea level.
50
The neutron scattering method is not useful in estimating the moisture in
Discuss
Answer & Solution
Answer: Option D
Solution:
The neutron scattering technique is used to measure water content in the soil. The principle involved in this method is when a source is lowered into the soil and fast neutrons are emitted, the soil causes the neutron to slow and scatter. The result is that the probe becomes surrounded by a cloud of slow neutrons. But this method is not useful in estimating the moisture in organic soils.