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As early as 1780 he began his experiments, using not only the land plaster and clover but practicing deeper ploughing and rotating crops.

To prevent the tar sticking to the hands in planting, dust the nuts with dry wood ashes, land plaster, or fine dry sand.

Gypsum or land plaster holds ammonia, and is thus of the highest value as a preservative.

The onion fly may, in part, at least, be abated by the use of equal parts of wood ashes and land plaster dusted very thoroughly on the young plants.

The use of land plaster or lime is recommended upon the floors and gutters.