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Showing 1 to 2 of 2 for “"potash fertilizers"”.

  1. Relationship of the apple aphis and other insects to the dissemination of fire blight in apple orchards, with a view to methods of blight control

    … up" a tree by the application of phosphate and potash fertilizers and by the discontinuing of cultivation, especially when the soil is strong and rains are frequent. Hence the more practical methods must be followed: 1. Fight the insects which spread the disease. Spray with nicotine sulphate or …

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