They actually had some horse manure boxed up and ready to ship.
Have manure put up in heaps and mixed with earth."
The fact that the growth of a leguminous crop, such as red clover, leaves the soil in a higher condition for the subsequent growth of a grain crop - that, indeed, the growth of such a leguminous crop is to a great extent equivalent to the application of a nitrogenous manure for the cereal crop - was in effect known ages ago.
Most of the nitrogen in the straw of the cereals, and a very large proportion of that of the much more highly nitrogenyielding crops, returns to the land as manure, for the benefit of future cereals and other crops.
Although good crops may follow the application of lime, the latter is not a direct fertilizer or manure and is no substitute for such.