Horticulture - Study Mode

[#311] Which of the following fruits contains the highest amount of Ascorbic Acid?
Correct Answer

(B) Aonla

Explanation

Solution: Aonla is the fruit from the following options that contain the highest amount of ascorbic acid. The Vitamin C content of its expressed juice is 921 mg/100 cc, twenty times more than that of other citrus fruits. 100 grams of fresh fruit contains 470 to 680 mg of vitamin C. The fruit is a good source of vitamin C. The fruit is having medicinal value. Aonla is used in indigenous medicines like trifla and chavanprash. Fruits are commonly used for preserving, pickles, candy, jelly and jam. Besides fruits, leaves, bark and even seeds are being used for various purposes.

[#312] Ideal conditions for storing onions is
Correct Answer

(C) 0°C, 70% RH

Explanation

Solution: Ideal conditions for storing onions are 0°C and 70% RH. Storage of onion bulbs in a cold store with optimum relative humidity extends the shelf life of onion bulbs and reduces post-harvest storage losses. The optimal storage temperature in cold storage is 0°C with 65 - 70% relative humidity. Under these conditions, the storage losses after six months are only about 5% which is mainly due to moisture loss. Regular monitoring of both temperature and relative humidity in the store is necessary to avoid significant fluctuations in environmental conditions.

[#313] For getting optimum plant population of chilli how much seed will be required (Kg/ha)
Correct Answer

(B) 1.5 - 2.0

Explanation

Solution: For getting the optimum plant population of chili, the seeds required will be 1.5 - 2.0 kg/ha. Chilli is a plant of tropical and subtropical regions. It grows well in warm and humid climates and has a temperature of 20 - 30 QC. As a rainfed crop, it is grown in areas receiving an annual rainfall of 75 - 100 cm. The amount of seed required for a unit area of land to grow any crop successfully. In other words, the amount of seed required to raise a crop successfully on a given land is called a seed rate for that crop of the land. It also depends on the quality of seed, soil and climate of that area.

[#314] A dwarf root stock of apple is
Correct Answer

(A) M-9

Explanation

Solution: A dwarf rootstock of apples is M-9 (Malus) . Dwarfing rootstocks produce the smallest trees and range from 6 feet tall to 12 to 14 feet tall. The malus M-9 are widely used rootstocks for high-density orchards on fertile grounds. Trees grown on this very important dwarf apple rootstock are relatively small in height. A support system, and stakes, are required. First apple production from fruit trees on M-9 can be expected in the second year after planting.

[#315] First earthing in potato should be done . . . . . . . . days after planting to provide optimum space for tuberization.
Correct Answer

(B) 30 - 35

Explanation

Solution: First earthing in potatoes should be done 30 - 35 days after planting to provide optimum space for tuberization. The main object of earthing up is to keep the soil loose and destroy weeds. Two or three earthing up should be done at an interval of 15 - 20 days. The first earthing-up should be done when the plants are about 15 - 25 cm high. The second earthing up is often done to cover up the tubers properly.