The Onion Sowing Challenge Quiz

Explore key facts about onion cultivation, from sowing timing to pests, varieties, and soil preferences. Perfect for those new to horticulture or looking to refresh essential agricultural knowledge.

1. Ideal Sowing Time

   What is the most suitable season for sowing onion seeds in temperate regions to achieve optimal bulb development?

   1. Mid-summer
   2. Winter
   3. Late autumn
   4. Early spring

   Explanation: Sowing onion seeds in early spring allows bulbs to mature before the onset of hot weather, which supports optimal growth. Mid-summer sowing often results in poor bulb formation due to excessive heat. Late autumn and winter sowing expose seeds to cold or frost, lowering germination and yield.

2. Soil Requirements

   Which soil type is generally preferred for cultivating onions for healthy growth and good yields?

   1. Acidic peat
   2. Sandy desert soil
   3. Heavy clay
   4. Loamy soil

   Explanation: Loamy soil provides good drainage, fertility, and structure for onions, supporting healthy root and bulb development. Heavy clay holds too much water, leading to rot. Acidic peat usually lacks nutrients needed for onions. Sandy desert soil drains too quickly and may be low in nutrients.

3. Onion Varieties

   Which of the following is an example of a commonly cultivated bulb onion variety?

   1. Golden Beetroot
   2. Early Carrot
   3. Leaf Lettuce
   4. Red Creole

   Explanation: Red Creole is a well-known bulb onion variety suitable for various climates. Golden Beetroot, Early Carrot, and Leaf Lettuce are not onion varieties; they represent different plant species used in horticulture.

4. Watering Practices

   During which stage should watering be reduced to help onions form dry, storable bulbs?

   1. Transplanting stage
   2. Seedling stage
   3. Bulb maturation stage
   4. Before sowing

   Explanation: Reducing watering during bulb maturation encourages bulbs to dry and develop thin necks, improving storage quality. Seedlings and transplants need consistent moisture for establishment; reduction at those stages can hamper growth. Watering before sowing helps seed germination but is unrelated to bulb drying.

5. Common Onion Pests

   Which insect is a well-known pest of onions that can cause damage by attacking bulbs and roots?

   1. Cabbage worm
   2. Potato psyllid
   3. Corn earworm
   4. Onion maggot

   Explanation: Onion maggot larvae feed on onion bulbs and roots, causing stunted growth or rot. Cabbage worms target brassicas, not onions. Potato psyllid causes problems in potatoes, and corn earworm primarily infests corn, not onion crops.