Free Improvement in Food Resources 03 Practice Test - 9th Grade
Question 1
An abiotic factor which affects crop production is____.
pest
weed
temperature
bacteria
SOLUTION
Solution : C
The factors which influence crop production can be grouped into two types: biotic and abiotic. The factors which are related to living beings are called biotic factors. Non-living factors are called abiotic factors. For example, salinity, temperature etc.
Question 2
Crop variety improvement is done to achieve which of the following objectives?
Higher yield
Degraded quality of the agricultural products
Lesser resistance to insects
Lesser resistance to pests
SOLUTION
Solution : A
The main goals of crop variety improvement are:
i. higher yield
ii. improved quality
iii.change in maturity period
iv. wider adaptability
v. desirable agronomic (plant/crop) characteristics
Question 3
Small storage reservoirs which intercept and store the run-off of small catchment area are called___.
Canals
Wells
Tanks
Watershed
SOLUTION
Solution : C
Small storage reservoirs which intercept and store the run-off of small catchment area are called tanks. Tanks are an important source of irrigation for far-flung villages. It acts as a artificial reservoir of any size.
Question 4
Which of the following micro-organisms can cause diseases in plants?
- Fungi
- Bacteria
- Viruses
Only 2
Only 3
1 and 2
1, 2 and 3
SOLUTION
Solution : D
Diseases in plants can be caused by fungi, bacteria and viruses.
For example, wheat rust is fungal in origin, yellow vein mosaic of okra is caused by virus and citrus canker is a disease affecting citrus species caused by the bacterium Xanthomonas axonopodis.
Question 5
Animal based farming includes management of:
- Goat
- Cow
- Sheep
Only 1
3 and 1
1, 2, and 3
SOLUTION
Solution : D
Animal husbandry includes scientific management of animal livestock. It includes rearing of animals such as goat, sheep, cattle, hen, pigs etc. These animals are reared for milk, meat or for farm work.
Question 6
Which of these is a foreign breed of cow?
Red Sindhi
Sahiwal
Jersey
Leghorn
SOLUTION
Solution : C
Foreign breeds of cow are used for breeding with indigenous breeds primarily to produce a superior breed having better qualities such as long lactation periods. Jersey and Brown Swiss are some examples of foreign breeds.
Question 7
Which of the following elements can be obtained by plants directly from air?
SOLUTION
Solution : C
Plants take in carbon dioxide directly from the air. Thus, carbon and oxygen are obtained directly from the air. Iron, calcium and boron are supplied to the plants through the soil.
Question 8
Cross breeding programmes between indigenious and foreign breeds of farm birds is done to develop which of the following desirable characteristics?
Reduced number of chicks
Reduced tolerance to high temperature
SOLUTION
Solution : B
The cross-breeding programs between Indian and foreign breeds of birds are focused on developing following.
i) New varieties with increased number and quality of chicks.
ii) Increased tolerance to high temperature.
iii) Low maintenance.
iv) Reduction in the size of the egg-laying bird with ability to utilise more fibrous and cheaper diets formulated using agricultural by-products.
Question 9
Crossing between two different species of the same genus is called interspecfic hybridisation.
SOLUTION
Solution : A
Crossing between two different species of the same genus is called interspecific hydridisation. It is one of the methods used to improve plant characteristics.
Question 10
The farming technique where there is minimum or no use of chemical fertilizers, herbicides and insecticides is called ___.
SOLUTION
Solution : B
The farming technique in which there is minimum or no use of chemical fertilizers, herbicides and insecticides is called organic farming. The manure used in this case is made from organic waste and is devoid of any harmful chemicals.