In reported speech, present perfect changes to past perfect. So, option 4 is correct.
Which of the following is an example of a non ‐ edible oilcake is NOT suitable for feeding cattle?
Which element is responsible for nodulation in legumes?
Global warming potential of methane is
Broadly speaking, there are ______ soil horizons in the world.
Which of the following is used as a purgative in animals?
Total budgetary allocation for Swatch Bharat Mission 2.0 for the period 2021-26 is
When Pi is productivity per unit input of the limited or non-renewable resource, Si is alteration in soil properties, Wi is change in water resource an...
When the production of both inter crops is equal to that of its solid planting, it is known as
Pride of India is a variety of......... crop.
What is the depth of irrigation, if an area of 2 ha is irrigated in 50 hrs with a discharge rate of 300 l/min?