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.
Out of manures and fertilizers, which one is nutrient specific?
Q 2.
What is the full form of IARI?
Q 3.
What are draught animals?
Q 4.
Give examples of commonly used irrigation systems in our country?
Q 5.
What are fertilizers? Give two examples.
Q 6.
Fertilizers are useful for short term benefits or long-term benefits?
Q 7.
Based on kinds of biological material used, how many types of manures are there?
Q 8.
Name some pulses that give us proteins.
Q 9.
Give examples of oilseeds that provide us fats.
Q 10.
What are the desirable agronomic characteristics for crop improvement?
Q 11.
Name the nutrients that plants take from air?
Q 12.
Fill In the Blanks :
Unwanted plants in the cultivated field are called ________.
Q 13.
What are Macro-nutrients?
Q 14.
Fill In the Blanks :
Bos indicus are the species of ________.
Q 15.
Fill In the Blanks :
Organic substances of animal or plant origin that is added to the soil to increase its fertility and structure are called _____.
Q 16.
From where do plants acquire the following nutrients?
(i) Nitrogen
(ii) Hydrogen
Q 17.
Manures are useful for short term benefits or long-term benefits?
Q 18.
Fill In the Blanks :
Cattle used for farm labour is called ______.
Q 19.
List the nutrients that plants absorb from soil.
Q 21.
What are milch animals?
Q 22.
Give examples of cereals that give us carbohydrates.
Q 23.
Fill In the Blanks :
Red Sindhi and Sahiwal are breeds of _____ _______.
Q 24.
Name the revolution which led to better and efficient production and availability of milk.
Q 25.
What is organic farming?
Q 27.
Fill In the Blanks :
Crossing between genetically dissimilar plants is called _________.
Q 28.
Fill In the Blanks :
Nutrients required by plants in large quantities are called ________.
Q 29.
What are the major sources of food? Name the commercial practices we perform to obtain the food.
Q 30.
What is vermicompost?
Q 31.
What is the most common source of irrigation in India?
Q 32.
Name the biotic factors that affect on crop production.
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 :
Vitamin ___ and ____ (A, B, C, D , K) levels are kept high in the poultry feeds.
Q 35.
Fill In the Blanks :
Xanthium, Cyperinus rotundus and Parthenium plants generally grow along paddy plants. Such plants are called ____.
Q 37.
Give examples of fodder crops.
Q 38.
List the seven micro-nutrients taken by plants?
Q 39.
Give examples of fumigants.
Q 40.
Fill In the Blanks :
__________ and _________ provide us with all our animal and plant food.
Q 41.
What is the full form of NPK?
Q 42.
Name the two common weeds of wheat and rice crop.
Q 43.
Give examples of two major weeds that grow during Kharif season.
Q 44.
Fill In the Blanks :
_______ and ________ are the main sources of nutrient supply to crops.
Q 45.
Fill In the Blanks :
_______ and _________ are a rich source of vitamins and minerals.
Q 46.
What is domestication?
Q 47.
Define inter-cropping.
Q 48.
Fill In the Blanks :
The science of growing vegetables, fruits and ornamental plants is called _________.
Q 49.
Give examples of inter-cropping.
Q 50.
Fill In the Blanks :
Composting done using earthworms is called _________.
