Figure shows the two crop fields plots A and B] have been treated by manures and Chemical fertilisers respectively, keeping other environmental factors same. Observe the graph and answer the following questions. (i) Why does plot B show sudden increase and then gradual decrease in yield? (ii) Why is the highest peak in plot A graph slightly delayed? (iii) What is the reason for the different pattern of the two graphs? Open Answer »
What would happen if poultry birds are larger in size and have no summer adaptation capacity? In order to get small-sized poultry birds having summer adaptability, what method will be employed? Open Answer »
Arrange these statements in correct sequence of preparation of green manure. (a) Green plants are decomposed in soil. (b) Green plants are cultivated for preparing manure or crop plant parts are used. (c) Plants are ploughed and mixed into the soil. (d) After decomposition it becomes green manure. Open Answer »
Group the following and tabulate them as energy yielding, protein yielding, oil yielding and fodder crop. Wheat, rice, berseem, maize, gram, oat, pigeon gram, sudan grass, lentil, soyabean, groundnut, castor and mustard. Open Answer »
If there is low rainfall in a village throughout the year, what measures will you suggest to the farmers for better cropping? Open Answer »
Describe composite fish culture system. What is the major problem in fish farming? How is it overcome? Open Answer »
Why are improved poultry breeds developed? Describe the desirable traits for which new varieties are developed. Open Answer »