Agronomy - Study Mode

[#356] Out of 143 million hectares cultivated area of India irrigated ara is about?
Correct Answer

(A) 50 million hectares

Explanation

Solution: A total of 143 million hectares of geographic land is agricultural land in our country, out of which approximately 45% - 48% is rainfed, which relies on irrigation to fulfill the water requirements of the plants. And this percentage is about 50 million hectares.

[#357] Cumin seed belongs to the family of
Correct Answer

(D) Umbelliferae

Explanation

Solution: Cumin seed is a tiny dried seed that comes from a herbaceous plant that belongs to the family Umbelliferae. The other herb plants in this family are parsley, carrots, dill and caraway. Cumin is durable and adaptable to both warm and cool climates. It is easily grown around the world. India is the largest producer as well as consumer of cumin.

[#358] Happy Seeder generally fulfils
Correct Answer

(B) Only two of the principles of Conservation Agriculture

Explanation

Solution: A happy seeder is a tractor-mounted machine that cuts and lifts rice straw remains after harvesting, sows wheat seed into the soil and again covers the field by putting straw over the sown area as mulch. So, it fulfills only two principles of C. A. (Conservation Agriculture), i.e., tillage and mulching.

[#359] Calculate the Base period of a crop if Duty of water is 1200 hectares/cumec and Delta is 50 cm
Correct Answer

(B) 70 days

Explanation

Solution: The base period for any crop is the total period of the plantation from the day of first irrigation provided to the field till the last watering before harvesting. The formula to calculate Base period $$Delta = frac{{{ ext{B}} imes 24 imes 60 imes 60}}{{{ ext{D}} imes { ext{104}}}} = frac{{8.64{ ext{B}}}}{{ ext{D}}}{ ext{ metres}}$$ Where, D = Duty in hectares/cumec = 1200 hectares/cumec $$Delta $$ = Total depth of water supplied in metres (Delta) = 50 cm = 0.5 m B = Base period in days Therefore, $${ ext{B}} = frac{{0.5 imes 1200}}{{8.64}} = 69.44 = 70{ ext{ days approx}}{ ext{..}}$$

[#360] The genus Oryza includes
Correct Answer

(C) 24 species

Explanation

Solution: Oryza is a genus of plants in the grass family. It includes the major food crop rice. It consists of 24 species and taxa. There are four major categories of rice worldwide: Indica, Japonica, aromatic and glutinous. Members of the genus grow as tall, wetland grasses, growing to 1 - 2 meters tall, the genus includes both annual and perennial species.