GK Agriculture Crops questions and Answers Objective Type

1. The science concerned with vegetable culture is called as…. (a) floriculture (b) olericulture (c) horticulture 2. Which of the following elements is almost non essential for plants? (a) Ca (b) Mo Ans. (d)  DOWNLOAD (d) agriculture (c) Zn (d ) Na 3. Although a deficiency of any one of the elements listed may result in chlorosis, only one of these elements is an element found in chlorophyll. Which is it? (a) Zinc (b) Iron READ PAPER (c) Magnesium  4. Which of the following elements is not present in a nitrogenous base? (d) Chloride Ans. (b) Ans. (c) 1/18 3/7/2017 GK Agriculture Crops questions and Answers Objective Type | Gurdeep Tomar - A 4. Which of the following elements is not present in a nitrogenous base? (a) Hydrogen (b) Carbon (c) Phosphorus 5. A water-fern, which is used as a green manure in rice fields, is (a) Salvinia (b) Mucor (c) Aspergillus 6. Green manure plants used by farmers mainly belong to the family (a) Compositae (b)Leguminosae 7. Major food crops of the world b1ong to (a) leguminosae (b) gramineae 8. The principal cereal crop of India is (a) wheat (b) rice (c) Solanaceae (c) solanaceae (c) barley (d) Nitrogen (d) Azolla (d) Poaceae (d) sorghum Ans. (c) Ans. (d) Ans. (b) (d) cruciferae 9. Which one among the following chemicals is used for causing defoliation of forest trees? (a) Posphon D (b) Malic hydrazide 10. Bioherbicides have been recommended (a) to prevent ecodegradation (c) because of their cheap rates (c) 2, 4-D (d) Amo 1618 (b) because of their ready availability (d) because of their abundance Ans. (b) Ans. (b) Ans. (c) Ans. (a) 11. The most important weed against which eradication measures would be taken on war footings is (a) Eichhornia (b) Dactylis (c) Parthenium 12. Water logging of soil makes it physiologically dry because (a) this condition does not allow the capillary force to work 2 (b) this condition does not allow oxygen to enter the soil (c) both (a) and (b) (d) non