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     3 years ago 

    Yeah, thanks for bringing this to my notice,

    For a 100m2 piece of land you need 10kg of calcium, that should be 100%.

    But from our question, Marl has only 50% calcium, so to make that up to the required dosage, simply multiply the average recommended dosage of calcium for a 100m2 land by 2
    (I.e 10kg X 2) this will give 20kg of Marl. This is so as to make up to the requirements of 100%calcium.

    Therefore, the required dosage of Marl is 20kg for a 100m2 piece of Land.

    Thanks.

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       3 years ago 

      That's correct! You've got the reward, congrats.

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         3 years ago 

        Thanks a lot, you're the best. 🙏👏😊

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