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Agriculture Agricultural Miscellaneous Difficulty: Medium

Rotten egg odour in water is due to

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Application of organic materials with C : N ratio wider than 20 to 30 : 1 leads to . . . . . . . . of soil N The range of the following observation will be 0, 1, 1, - 1, 0 - 1, 1. The enzyme which removes positive supercoiling is Bacillus thuringiensis is available in market as Which of the following is not correct