Agronomy - Study Mode

[#851] LER of 1.25 means
Correct Answer

(C) 25% yield advantage

Explanation

Solution: LER is the Land Equivalent Ratio . When LER is 1.25, it indicates not only a relative yield increase of 25% but also a monetary increase of 25%. LER is a concept in agriculture that describes the relative land area required under sole cropping to produce the same yield as under intercropping culture.

[#852] Bunch type variety of groundnut is
Correct Answer

(C) GG-2

Explanation

Solution: Several varieties of groundnut show bunch type fruiting like GG-2, GG-4, GG-5, GG-6. These varieties are mostly grown in summer as they mature earlier and are harvested safely before the onset of monsoon.

[#853] Pollen viability of wheat is related to supply of
Correct Answer

(C) Boron

Explanation

Solution: Pollen viability refers to its functionality which is the ability of pollen to mature, germinate and transfer the male gametes to the embryo sac. Wheat pollen loses germination ability rapidly when stored at room temperature in both dry airs as well as humid air. Thus, boron is the plant nutrient responsible for pollen viability in wheat.

[#854] Water harvesting is defined as
Correct Answer

(D) Collecting the excess run off from rain on the farm in ponds and utilizing it later for agriculture

Explanation

Solution: Water harvesting is rainwater harvesting and is an ancient technique to be used to collect the rainwater through excess runoff on the farm in ponds, or in underground storage tanks to use later for agricultural or domestic purposes.

[#855] Which one of the following types of resistance is present in a crop variety showing high degree of resistance to a pathogen but becoming susceptible to it after large scale cultivation for 4 to 5 years or so
Correct Answer

(A) Vertical resistance

Explanation

Solution: Resistance to plant disease is either Vertical i.e. Specific or Horizontal i.e. Nonspecific. A plant variety that exhibits a high degree of resistance to a single race or strain, of a pathogen is said to be vertically resistant. This is usually controlled by a single plant gene but after large-scale cultivation, for 4 - 5 years it becomes susceptible to it.