Guava Growth & Feeding Facts Quiz

Explore the essentials of guava nutrition management for healthy growth and high yields. This quiz highlights key nutrients, schedules, and best practices in guava horticulture.

1. Essential Nutrient for Guava Growth

   Which primary nutrient is most essential for promoting strong vegetative growth in guava plants?

   1. Nitrogen
   2. Calcium
   3. Zinc
   4. Phosphorus

   Explanation: Nitrogen is crucial for vegetative growth, helping guava plants produce lush leaves and shoots. Phosphorus mainly aids root development and flowering. Calcium is important for cell wall structure, not directly for vegetative growth. Zinc is required in trace amounts, mostly for enzyme activity.

2. Best Time to Apply Organic Manures

   When is the most suitable time to apply organic manures to guava orchards for optimal nutrient availability?

   1. At fruit maturity
   2. During full bloom
   3. Before monsoon onset
   4. After fruit harvest

   Explanation: Applying organic manures before the monsoon allows nutrients to dissolve and become readily available during active growth. After fruit harvest or at fruit maturity, nutrient requirements are lower. Full bloom is not optimal since nutrient absorption peaks earlier.

3. Deficiency Symptom: Yellowing of Younger Leaves

   If a guava plant shows yellowing of young leaves while older leaves remain green, which nutrient is likely deficient?

   1. Potassium
   2. Boron
   3. Iron
   4. Sulphur

   Explanation: Iron deficiency often causes yellowing of young leaves due to its immobility in plants. Potassium and Sulphur deficiencies usually affect older leaves first. Boron deficiency leads to bud and fruit issues, not typically leaf yellowing.

4. Recommended Method for Micronutrient Correction

   What is the most effective method for correcting micronutrient deficiencies in guava trees quickly?

   1. Foliar spray
   2. Deep irrigation
   3. Root pruning
   4. Mulching with straw

   Explanation: Foliar sprays allow rapid uptake of micronutrients through leaves. Root pruning does not correct deficiencies and may harm the plant. Deep irrigation supplies water, not nutrients, and mulching improves moisture but not direct nutrient correction.

5. Balanced Fertilization Practice

   Which practice helps avoid nutrient imbalances when fertilizing guava trees?

   1. Watering infrequently
   2. Using only organic matter
   3. Applying double dose of fertilizer
   4. Soil testing before application

   Explanation: Soil testing identifies existing nutrient levels so exact needs can be met, preventing excess or deficiency. Doubling fertilizers can cause toxicity. Relying solely on organic matter may not satisfy all requirements. Watering does not address nutrient balance.

6. Role of Potassium in Guava

   For guava fruit quality and resistance to stress, which nutrient is especially important?

   1. Sodium
   2. Chlorine
   3. Magnesium
   4. Potassium

   Explanation: Potassium enhances fruit quality and stress tolerance in guava. Magnesium is vital for chlorophyll but not directly fruit quality. Chlorine and Sodium are less important for fruit development and can even be harmful in excess.

7. Frequency of Manure Application in Guava Orchards

   How often should well-rotted farmyard manure typically be applied to established guava trees?

   1. Once in five years
   2. Every month
   3. Once a year
   4. Every week

   Explanation: Annual application maintains soil organic content and nutrient supply. Monthly or weekly applications are excessive. Applying once in five years risks nutrient deficits for guava trees.

8. Correcting High Soil pH for Nutrient Uptake

   If guava trees show nutrient uptake issues due to high soil pH, what is a common practice to improve availability?

   1. Increase irrigation frequency
   2. Apply organic matter or compost
   3. Reduce shade around trees
   4. Apply more chemical fertilizer

   Explanation: Organic matter helps buffer soil pH and enhances nutrient availability. Increasing irrigation or shade does not address pH issues. Adding chemical fertilizer may worsen nutrient lock-up in alkaline soils.