Question:
What are weeds?
Answer:
Weeds are unwanted plant species growing in the domesticated crops. The noxious weeds are harmful, adversely affecting crop productivity, causing health hazards in humans and animals and lowering fish production.
Improvement in Food Resources
Q 1.
Based on kinds of biological material used, how many types of manures are there?
Q 2.
What is the full form of IARI?
Q 3.
Name some pulses that give us proteins.
Q 4.
What are draught animals?
Q 5.
Give examples of fumigants.
Q 6.
Name the revolution which led to better and efficient production and availability of milk.
Q 7.
Out of manures and fertilizers, which one is nutrient specific?
Q 8.
Fertilizers are useful for short term benefits or long-term benefits?
Q 9.
What are fertilizers? Give two examples.
Q 10.
From where do plants acquire the following nutrients?
(i) Nitrogen
(ii) Hydrogen
Q 12.
Fill In the Blanks :
_______ and _________ are a rich source of vitamins and minerals.
Q 13.
Fill In the Blanks :
Nutrients required by plants in large quantities are called ________.
Q 14.
Fill In the Blanks :
Marine fish capture is done by fishing nets guided by _______ and ________.
Q 15.
Fill In the Blanks :
The science of growing vegetables, fruits and ornamental plants is called _________.
Q 16.
Fill In the Blanks :
The basic advantages of inter-cropping are that it maintains soil _____ and controls _____.
Q 17.
Manures are useful for short term benefits or long-term benefits?
Q 18.
Fill In the Blanks :
The practice of growing two or more crops simultaneously on the same field is called _____.
Q 20.
What are Macro-nutrients?
Q 21.
Fill In the Blanks :
__________ and _________ provide us with all our animal and plant food.
Q 22.
What is domestication?
Q 23.
Give examples of fodder crops.
Q 24.
What is vermicompost?
Q 25.
Define inter-cropping.
Q 26.
Fill In the Blanks :
Cattle used for farm labour is called ______.
Q 27.
What are the desirable agronomic characteristics for crop improvement?
Q 28.
Name the approaches used to enhance crop yield.
Q 29.
List the nutrients that plants absorb from soil.
Q 30.
Fill In the Blanks :
_______ and ________ are the main sources of nutrient supply to crops.
Q 32.
What is mixed cropping?
Q 33.
Fill In the Blanks :
In order to get maximum returns, different crop combinations are grown on the same field in a pre-planned succession. This process is called _______.
Q 34.
Fill In the Blanks :
Xanthium, Cyperinus rotundus and Parthenium plants generally grow along paddy plants. Such plants are called ____.
Q 35.
Name the biotic factors that affect on crop production.
Q 36.
Give examples of Pesticides
Q 37.
Name the programmes executed in India to increase food production.
Q 38.
Fill In the Blanks :
Bos indicus are the species of ________.
Q 39.
Give examples of cereals that give us carbohydrates.
Q 40.
Name the nutrients that plants take from air?
Q 41.
What is organic farming?
Q 42.
What is the full form of NPK?
Q 43.
Give examples of two major weeds that grow during Kharif season.
Q 44.
Fill In the Blanks :
Unwanted plants in the cultivated field are called ________.
Q 45.
Fill In the Blanks :
Vitamin ___ and ____ (A, B, C, D , K) levels are kept high in the poultry feeds.
Q 46.
List examples of Macro-nutrients for plants?
Q 47.
List the seven micro-nutrients taken by plants?
Q 48.
Give examples of commonly used irrigation systems in our country?
Q 50.
Fill In the Blanks :
Composting done using earthworms is called _________.
