Crop canopy temperature is measured

As a general rule, symptoms of nitrogen deficiency is first noticeable in:

The ideal temperature range for optimum growth and flowering of Carnation is

The plant-origin insecticide, "Azadirachtin" is derived from which plant?

What is the role of carbonic acid in chemical weathering?

Which type of soil is found along the canal bank?

Which of the following is a measure to promote the export of organic products under India's Agricultural Export Policy?

Which of the following is an example of a C₄  plant that produces OAA?

The root disease “club root” is caused by 

Modification that is added to the Improved Kothar type to enhance protection against rodents?

Which was the first successful antifungal antibiotic to be developed, and it is still in general use?