Explore the key stages, requirements, and practices in barley crop growth with these focused questions on agriculture. Enhance your understanding of barley's optimal conditions and growth factors.
Which temperature range is most suitable for the germination of barley seeds in agricultural fields?
Explanation: Barley germinates best at 12–25°C, which promotes uniform and healthy seedling emergence. Lower temperatures like 0–5°C can hinder germination, while 30–35°C and 40–45°C are too high and may reduce seed viability or lead to poor growth.
During which stage does barley typically require the most water for successful yield?
Explanation: Barley needs the most water during the heading stage because this is when grain formation is critical. Dormancy is an inactive period, maturity means growth is slowing, and harvest occurs after water needs decline.
Which nutrient is especially important for strong early growth and root development in barley crops?
Explanation: Phosphorus is vital for early root and shoot growth in barley. Calcium and sulfur are necessary but not as critical at early stages, and iron primarily aids in chlorophyll formation rather than initial root development.
If a barley field shows symptoms of leaf spots and reduced tillering, which disease is a likely cause?
Explanation: Net blotch commonly results in leaf spots and reduced tillering in barley. Powdery mildew causes white powdery spots, rust produces pustules, and ergot forms dark fungal bodies in place of grains.
What is the preferred soil pH range for cultivating barley for high yields?
Explanation: Barley thrives in soils with a pH of 6.0–7.5, enabling nutrient availability. Soils with lower pH (acidic) or high pH (alkaline), like 4.0–5.0 or 8.0–9.0, can restrict growth, and 5.0–5.5 may still be too acidic for optimal yields.