Agronomy - Study Mode

[#696] Scientific name of 6 rowed barley
Correct Answer

(B) H. vulgare

Explanation

Solution: The scientific name of 6 rowed barley is Hordeum vulgare . The specific feature which makes it 6 rowed variety of barley is having the three spikelets of each cluster fertile so that the spike is six-rowed.

[#697] A short duration crop in between two main seasonal crops is termed as
Correct Answer

(D) Catch crop

Explanation

Solution: A catch crop is a fast-growing crop that is grown between successive planting of the main crop. It is a short-duration crop in between two main seasonal crops. It is a type of successive planting and it makes more efficient use of growing space. It prevents minerals from being flushed away from the soil.

[#698] Nitrogen fixation increased by
Correct Answer

(A) Phosphorus

Explanation

Solution: Nitrogen fixation is the phenomenon of converting atmospheric nitrogen into nitrogen compounds which can be absorbed by the legume plants in the presence of microorganisms through a series of biochemical reactions. The process of nitrogen fixation is increased by the application of phosphorus fertilizer to the soil. It enhances the symbiotic nitrogen fixation process in legume crops.

[#699] Plant available water is
Correct Answer

(A) A portion of Capillary water

Explanation

Solution: Plant available water is the capacity of any plant is the difference between the soil's water content at the drained upper limit and the crop lower limit. It is the maximum amount of water stored in a soil profile that can be used by plants. A portion of capillary water is a type of plant available water.

[#700] The normal form of plant is maintained by
Correct Answer

(A) Water

Explanation

Solution: Water is the most essential element for each organism present on Earth. Plants get nutrients from the air, water and soil. All the essential nutrients are provided by these basic elements. But plants can be grown in the absence of soil like in the hydroponics method , but cannot be grown without water. Water is the element required for transporting nutrients to the plant.