hi please answer my question now
Answers
Answer 1=> Advantages:-
i) Manure -
(a) They enrich the soil with nutrients.
(b) It provides humus to the soil.
(c) It helps the soil to restore its texture.
(d) The organic matter provide food for the soil organisms.
ii) Fertilizers -
(a) They contains higher amount of nutrients.
(b) They are easily absorbed by the plants.
(c) They are concentrated and hence are easy to store and transport.
(d) They are nutrient specific.
Disadvantages:-
i) Manures -
(a) Manures are bulky with low nutrition content.
(b) They are inconvenient to handle, store and transport.
(c) They are not nutrient specific.
ii) Fertilizers -
(a) They are chemically prepared substances.
(b) They do not provide humus to soil.
(c) Their over dose could be harmful for the soil.
(d) They are inorganic substances.
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Answer 2 =>
When too much water is given to the soil, it becomes wet. Water accumulates around the plant. This is called excessive irrigation or water-logging.
It is harmful to crops in the following ways:-
i) Excess water and wet soil do not permit proper aeration of the seed/root of the plants.
ii) Water logging increases amount of salts in the soil and damages the soil fertility.
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Answer 3 =>
Precautions to be absorbed while using pesticides are:-
* While handling any pesticides, keep your nose and mouth covered. Put on hand gloves.
* While spraying, position yourself in such a way that the wind blows away from your face (i.e., the air coming from your back side).
* Immediately after spraying is done, wash your hands, face and mouth thoroughly with clean water.
---×---×---×---×---×
Answer 4 =>
Traditional methods of irrigation are :-
i) Swinging - Basket method
ii) Moat or simple pulley system
iii) Water-Wheel method
iv) Chain-Pump method
v) Dhekli
vi) Rahat (Lever System)
Modern methods of irrigation are :-
i) Sprinkler system
ii) Drip System (or trickle system)
iii) Lift irrigation system.
---×---×---×---×---×
Answer 5 =>
The factors that have to be considered while sowing seeds are as follows :-
(a) Select only good quality, disease - resistant and high - yield seeds.
(b) Treat the seed with a fungicide before sowing.
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By Achintya Shukla
Subject - Science
Answer:
Answer 1=> Advantages:-
i) Manure -
(a) They enrich the soil with nutrients.
(b) It provides humus to the soil.
(c) It helps the soil to restore its texture.
(d) The organic matter provide food for the soil organisms.
ii) Fertilizers -
(a) They contains higher amount of nutrients.
(b) They are easily absorbed by the plants.
(c) They are concentrated and hence are easy to store and transport.
(d) They are nutrient specific.
Disadvantages:-
i) Manures -
(a) Manures are bulky with low nutrition content.
(b) They are inconvenient to handle, store and transport.
(c) They are not nutrient specific.
ii) Fertilizers -
(a) They are chemically prepared substances.
(b) They do not provide humus to soil.
(c) Their over dose could be harmful for the soil.
(d) They are inorganic substances.
---×---×---×---×---×
Answer 2 =>
When too much water is given to the soil, it becomes wet. Water accumulates around the plant. This is called excessive irrigation or water-logging.
It is harmful to crops in the following ways:-
i) Excess water and wet soil do not permit proper aeration of the seed/root of the plants.
ii) Water logging increases amount of salts in the soil and damages the soil fertility.
---×---×---×---×---×
Answer 3 =>
Precautions to be absorbed while using pesticides are:-
* While handling any pesticides, keep your nose and mouth covered. Put on hand gloves.
* While spraying, position yourself in such a way that the wind blows away from your face (i.e., the air coming from your back side).
* Immediately after spraying is done, wash your hands, face and mouth thoroughly with clean water.
---×---×---×---×---×
Answer 4 =>
Traditional methods of irrigation are :-
i) Swinging - Basket method
ii) Moat or simple pulley system
iii) Water-Wheel method
iv) Chain-Pump method
v) Dhekli
vi) Rahat (Lever System)
Modern methods of irrigation are :-
i) Sprinkler system
ii) Drip System (or trickle system)
iii) Lift irrigation system.
---×---×---×---×---×
Answer 5 =>
The factors that have to be considered while sowing seeds are as follows :-
(a) Select only good quality, disease - resistant and high - yield seeds.
(b) Treat the seed with a fungicide before sowing
Explanation: