Answer: Option B. -> False
:
B
Weedicides are chemicals that are sprayed in the fields to control weeds. Their usage should be greatly monitored and limited as they are not only poisonous to the plants but also to the farmers spraying these chemicals. Overuse of weedicides might cause these chemicals to enter the food chain and adversely affect many organisms.

Answer: Option D. -> The bacteria present in the roots fix nitrogen.
:
D
Roots of pulses (leguminous plants) have a symbiotic association with a bacterium called rhizobium, which fixes atmospheric nitrogen into the soil. Adding more nitrogenous fertilizers make the level of nitrogen in the soil too much for the crops. Hence, farmers need not use nitrogenous fertilizers.

Answer: Option B. -> True
:
B
Once harvested, grains are stored by farmers in jute bags and metallic bins. Large scale storage of grains is done in silos and granaries.

Answer: Option B. -> Vermicompost, poultry wastes, green manure
:
B
Organic manures areof plant or animal origin. They are not synthetic chemicals. Excessive use of chemical fertilizers lead to problems such as saline soil and barren lands. It also causespollution of underground water. Hence the use of organic manures is recommended as it increases thefertility of soil naturally. Cow dung, vermicompost, bone meal, goat droppings, poultry wastes, green manure are few examples of organic manures. NPK fertilizers, phosphate fertilizers, urea are few examples of chemical fertilizers.

Answer: Option A. -> Statement 1 is true and statement 2 and 3 are the correct implications of statement 1.
:
A
Poultry in India is the most efficient converter of low, fibre-rich foodstuff into highly nutritious animal protein food. In poultry farming, domestic fowls are raised to produce eggs and chicken. For this, the fowls are given animal feeds in the form of roughage, which mainly consists of fibres. Thus, by feeding animals a fibre rich diet, the poultry gives highly nutritious food in the form of eggs and chicken.

Answer: Option B. -> Direct cause of water pollution
:
B
$\bullet$ Manures are the organic substances obtained by the decomposition of animal excreta and plant waste. Adding manure is a natural way of increasing soil fertility and in turn increasing yield.
$\bullet$ Fertilisers are artificially synthesised inorganic salts which also increase yield. Excessive use of fertilisers kill the micro-organisms present in the soil. Theyrunoff into the nearby water bodies which wouldresultin water pollution.

Answer: Option C. -> Mustard
:
C
Crops which are grown during the rainyseason are called kharif crops. Paddy (rice), millets and cottonare examples of kharif crops. On the other hand, crops grown during the winter season are called rabi crops. Rabi crops include wheat, gram, and mustard.

Answer: Option A. -> True
:
A
Dried neem leaves are used for the storage of food grains at home as theyhaveantimicrobial properties and a characteristic odour that keeps pests away.

Answer: Option B. -> 5 → 2 → 4 → 1 → 3 
:
B
In basic agricultural practice, the first step is to prepare the soil for crop. This step includes tilling or ploughing. Once the soil is well prepared,sowing is done. After sowing, continuous water supply for crop growth is provided by irrigation. When the crops are ripe, they areharvested and the grains obtained are stored for further use.

Answer: Option B. -> (i) Assam, (ii) Punjab, (iii) Kerala
:
B
A harvest festival is an annual celebration which occurs around the time of the main harvest of a given region. Bihu, the national festival of Assam is celebrated three times in the year, Maagh in January, Bohaag in April and Kaati in October. Onam is the grand carnival of Kerala, celebrated sometime between August and September. Baisakhi is the major festival celebrated in the northern region of India, especially in Punjab. It is celebrated as the Indian thanksgiving day by farmers of Punjab, praying for future prosperity and thanking God for harvest.