Explore essential principles and practices for fertilizing Black Kalonji (Nigella sativa) to optimize crop health and productivity. This quiz covers nutrient needs, timing, and environmental considerations for sustainable yield improvement.
Which primary macronutrient is crucial for vegetative growth and robust yield in Black Kalonji farming?
Explanation: Nitrogen is vital for leafy, vegetative growth and directly impacts yield in Black Kalonji. Calcium supports cell structure but does not significantly boost yield by itself. Zinc is a micronutrient and needed in much smaller amounts. Sulfur is important for oil crops, but not as critical as nitrogen for overall growth.
At which growth stage should the first major dose of fertilizer typically be applied to Black Kalonji for optimal uptake?
Explanation: Applying fertilizers at sowing ensures nutrients are available when the young plants need them most. Application during flowering can lead to excess vegetative growth at the wrong phase. Applying after harvest or during seed storage provides no benefit to plant development.
How does adding well-rotted farmyard manure or compost benefit Black Kalonji crops?
Explanation: Organic matter like manure improves soil texture, enhances water retention, and supports healthy root systems. It does not increase pests, decrease nutrient absorption, or induce seed dormancy when used correctly.
Which symptom might indicate a potassium deficiency in Black Kalonji plants?
Explanation: Potassium deficiency often causes yellowing or scorching at the edges of leaves. Purple stem color is usually linked to phosphorus deficiency. Rapid seed germination and increased flower production are not typical symptoms of nutrient deficiencies.
What is a common consequence of over-fertilizing Black Kalonji with nitrogen-based fertilizers?
Explanation: Too much nitrogen promotes leaf growth at the expense of seed production, reducing yield quality. It does not lead to earlier seed maturation, improved drought resistance, or a decrease in fungal disease risk; in fact, lush growth may make plants more vulnerable.