Explain any one method of crop production which ensures high yield.

Explain any one method for coagulation

Explain any one method of preparation and structure of diborane.

Explain any one method for the estimation of ni- trogen present in an organic compound.

Give any one method to convert cast -iron into steel of high quality.

Explain any one method which is used for preparing amine containing one carbon less than the reactant.

Explain the various methods of crop improvement. Name one improved variety of Rice, Maize, Soyabean, Sunflower and Mustard.

Best method of improving crop yield is: