An easy mode of ascertaining the capabilities of soil : tests for the purity of artificial manures : mode of preserving the fertilizing contents of a dung-heap from escape, &c. &c. / by John Robinson.

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Agriculture, instrumentation

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An easy mode of ascertaining the capabilities of soil : tests for the purity of artificial manures : mode of preserving the fertilizing contents of a dung-heap from escape, &c. &c. / by John Robinson.