Nutri-Coconut Mastery Quiz Quiz

Assess your understanding of coconut nutrient management in horticulture with this targeted quiz focusing on fertilizers, deficiency symptoms, soil management, and nutrition strategies.

1. Coconut Nutrient Requirements

   Which macronutrient is typically required in the largest quantity for optimum coconut palm growth?

   1. Potassium
   2. Calcium
   3. Sulfur
   4. Nitrogen

   Explanation: Potassium is required in the largest quantity by coconut palms as it plays a key role in water regulation and fruit development. Nitrogen, while essential, is generally needed in lower amounts than potassium. Calcium and sulfur are also important but are required in smaller quantities relative to potassium for healthy coconut growth.

2. Deficiency Symptoms in Coconuts

   A coconut palm shows yellowing of older leaves and reduced nut yield. What nutrient deficiency does this most likely indicate?

   1. Zinc
   2. Magnesium
   3. Boron
   4. Phosphorus

   Explanation: Magnesium deficiency typically causes yellowing of older leaves and a reduction in nut yield in coconuts. Zinc deficiency usually affects young leaves, causing stunted growth. Phosphorus deficiency rarely results in leaf yellowing in coconuts, and boron deficiency is more related to abnormal nut development and leaf distortion.

3. Soil pH and Coconut Nutrition

   For best nutrient uptake, what is the ideal soil pH range for coconut cultivation?

   1. 7.8–8.5
   2. 6.0–7.5
   3. 4.0–4.8
   4. 5.2–5.8

   Explanation: A soil pH of 6.0–7.5 is optimal for coconut palms as it maximizes nutrient availability and uptake. Lower pH values (4.0–4.8 or 5.2–5.8) may cause certain nutrients to become less available. A high pH (7.8–8.5) can reduce micronutrient uptake and increase the risk of deficiencies.

4. Fertilizer Application Timing

   In a coconut plantation, what is the recommended timing for fertilizer application to ensure maximum uptake?

   1. At harvest time
   2. After every irrigation
   3. During the hottest month
   4. At the start of the rainy season

   Explanation: Fertilizer application at the start of the rainy season ensures nutrients are dissolved and absorbed efficiently by coconut roots. Applying during the hottest month can cause nutrient loss by volatilization, while post-harvest or after every irrigation can lead to inefficient use and higher costs.

5. Organic Manures in Coconut Gardens

   Which organic manure is commonly recommended to improve soil structure and provide slow-release nutrients in coconut cultivation?

   1. Ammonium sulfate
   2. Farmyard manure
   3. Muriate of potash
   4. Superphosphate

   Explanation: Farmyard manure is widely used in coconut gardens to improve soil structure and offer slow-release nutrients over time. Ammonium sulfate, superphosphate, and muriate of potash are inorganic fertilizers that supply specific nutrients but do not enhance soil organic matter or structure.