Plants can be made disease resistant by
breeding
weeding
spraying pesticide
irrigation
A plant used as rotation crop is
bengal gram
red gram
groundnut
all of the above
Biotic components include
all plants
all animals
water, air and soil
all the living organisms
Ranikhet is a disease that effects
fish
poultry
cattle
sheep
Which of the following is true for intercropping?
Seeds of two crops are mixed before sowing
Harvesting and threshing are not possible separately
Pesticides can be easily applied to individual crops
There are no set pattern of rows of crops
An exotic breed of cow is
Jersey
Frieswal
Sahiwal
Gir
Scientific name of Italian bee is
Apis indica
Apis dorseta
Apis mellifera
Apis florae
Hybrid is
homozygous dominant
homozygous recessive
heterozygous
mutant
Crop rotation is an important part of organic farming. Why is mono -cropping problematic?
The crop is vulnerable to organised crop thieves
It encourages the build up of diseases and pests that destroy that particular crop
If is not economic
None of these
High yielding varieties of crop plants can be obtained through the technique of
clonal selection
acclimatization
hybridization
pure line selection
