( 102 ) 
ble to cattle; by the second, the quantum of nu- 
tritive forage is increased—and by both methods 
the clover is effectually prevented froin heating. 
The next step, in our system, is to plough in the 
clover stubble, as a preparation for the succeeding 
Crop. 
VI. Of Wheat. 
This grain, so useful to man, (because forming so 
large a portion of his subsistence) is happily found 
to adapt itself to a great variety of soils and climates. 
It grows vigorously in clay, in loam, in calearious 
earth and even sand, when aided by manures, or in 
succession to peas, vetches, clover, &c. To the 
north it is found in the frozen regions of Siberia; 
and to the south, under the burning sun of Africa, 
it yields, according to the declaration of Pliny, 
more than one hundred fold.(1) In ancient Rome, 
its use, as a food for man, soon supersceded that of 
barley and rye; and in modern Europe, it is even 
denominated corn par excellence. | 
Of this invaluable grain, there are four species, 
distinctly marked and generally acknowledged, viz. 
Many headed wheat,(2) Polish wheat, spelts and 
common wheat. We shall speak only of the third 
and fourth species, because with the others we have 
little practical acquaintance ; and, 
Ist. Of Spelis. This species and its principal va- 
(1) * Tritico nihil est fertilius: utpote cum e modio, si sit aptum solum, quale in 
Byzacio Afric campo centuri quinquageni modii reddentur.” XVIII L Nat. Hist. 
Pliny. 
(2) This is the Z'riticum Compositum of botanists, called wheat of plenty, mi- 
raculous wheat, &c. yielding largely, but, on manufacture, giving much bran and 
bad flour. 
