Which one of the following is classified as a micronutrient required for plant growth?

In poultry farming, what is the primary difference between 'layers' and 'broilers'?

Which of the following practices are integral to 'Organic Farming'? 1. Use of bio-fertilizers like blue-green algae. 2. Use of synthetic pesticides like DDT. 3. Maximum input of chemical fertilizers for high yield. 4. Healthy cropping systems like mixed cropping. Select the correct answer using the code given below:

With reference to the nutritional requirements of poultry, consider the following statements: 1. The ration for broilers is protein-poor with minimal fat content. 2. The level of vitamins A and K is kept high in poultry feeds. 3. The dietary requirements for broilers are exactly the same as those for egg layers. Which of the statements given above is/are correct?

Which of the following are desirable agronomic characteristics for crop improvement? 1. Tallness and profuse branching for cereal crops. 2. Tallness and profuse branching are desirable characters for fodder crops. 3. Dwarfness for cereals to consume fewer nutrients. Select the correct answer using the code given below:

In a composite fish culture system, which one of the following species functions as a bottom feeder?