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Agriculture Agricultural Engineering Difficulty: Medium

Sulphur dioxide is toxic to plant at or above In fruit crops first artificial hybridization was performed by A mature male gametophyte is formed from pollen mother cell by An extension worker practically explains Japanese method of paddy cultivation to a group of farmers and also show its superiority over the traditional method. In the prosess, which of the following communication methods have been used by him? 1. Method demonstration 2. Result demonstration 3. Field visit 4. Study tour Correct statements are Match the following columns: Column I (Bacteria) Column II (Function) a. Nitrobacteria 1. Fixation of atmospheric nitrogen b. Ammonifying bacteria 2. Formation of NH 4 + nitrogen c. Denitrifying bacteria 3. Formation of NO 3 - nitrogen d. Rhizobium sp. 4. Formation of N 2 nitrogen