GK
SOIL AND AGRICULTURE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Borax
|
|
|
Zinc sulphate
|
|
|
Copper sulphate
|
|
|
Calcium sulphate
|
Detailed explanation-1: -Khaira disease of rice can be controlled by spraying ZnSo4 in the nursery bed of rice before transplanting to the main field. During land Preparation, ZnSO4 should be applied at the rate of (25-30)kg per hectare of land. Mix the ZnSO4 and Slaked lime in the ratio of 1:2 and make a solution in 100 litre of water.
Detailed explanation-2: -The correct answer is (A) Zinc deficiency. Note: Different nutrients have different functions in the body or an organism. Zinc deficiency leads to Khaira disease in rice which affects the plants and will also have an effect on the yield.
Detailed explanation-3: -Y. L. NENE (1) was the first to show that a foliar application of zinc sulfate corrects a disorder of the rice plant long known as Khaira disease in North-Central India.
Detailed explanation-4: -Why is it important. In Japan, Zn deficiency is the cause of the “Akagare Type II” disorder in rice.