In crop rotation, growing of crop plants like wheat is alternated with growing of
Identify the correct sequence of events carried out in preparation of soil.
Watering of dry soil → Ploughing →Breaking the crumbs → Levelling of soil
Ploughing → Levelling of soil → Watering of dry soil → Breaking the crumbs
Watering of dry soil → Breaking the crumbs → Ploughing → Levelling of soil
Breaking the crumbs → Ploughing → Leveling of soil → Watering of dry soil
Identify the given implement:
Which of the following is not a function of plough?
Tilling the soil
What is the advantage of using green manures like legumes and clover?
They help to destroy the weeds in crop fields.
They break up compact soil.
They have deep roots, which help to loosen the soil
They absorb atmospheric nitrogen and release nitrogen to soil through roots
Find the correct match of the columns.
Element supplied by fertilizer Example of fertilizers.
(i) Nitrogen (a) Super phosphate
(ii) Phosphorus (b) Potash
(iii) Potassium (c) Urea
(i) - (c), (ii) - (a), (iii) - (b)
(i) - (a) , (ii) - (c) (iii) -(b)
(i) - (b), (ii) - (c), (iii) - (a)
(i) - (b), ii) - (a), (iii)- (c)
Which of the following has to be added to the soil after sowing seeds of a high yielding crop variety?
Chemical fertilizers may get washed into water bodies through a process called:
How does Rhizobium act as a biological fertiliser ?
It provides phosphorus to the plants
It provides humus to the soil
It fixes atmospheric nitrogen and provides it to plants.
It provides oxygen to the roots of the soil
What is the effect of deforestation of trees on the ground water level?
The ground water level will increase greatly
The ground water level will decrease
The ground water level will increase slightly
There will not be any change in the ground water level