" I.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.

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

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

Best method of improving crop yield is:

Which of the following statement/s is/are and example of genetic engineering? I. Inserting a gene for human insulin production into bacteria. II. Selective breeding to produce cattle with high milk yields. III. Using methods like crop rotation with leguminous plants to increase the fertility of the soil. IV. Vegetative propagation and grafting are practised to ensure higher yield.