exclusive of water, of the total yield per hectare of fruit, taken up
to June 30, and of leaves, stems and runners, taken up to the middle
of August. These results, calculated in pounds per acre, are the
following (the plants contained 62.3 per cent of water and fruit 90
per cent):

Composition of the water-free strawberry crop (except roots), at the
middle of August, in pounds per acre, according to Pierre:

Plants Fruits Totals
Organic matter, exclusive of nitrogen 4268.4 1053.5 5321.9
Nitrogen 88.5 16.0 104.5
Silica, iron and manganese oxides 43.3 1.5/3.8 48.6
Phosphoric acid 35.3 5.4 40.7
Lime 102.7 7.9 110.6
Magnesia 16.1 .7 16.8
Potash 89.1 19.7 108.8
Soda 6.4 .9 7.3
Other matters 120.9 8.8 129.7

Dry substance 4770.7 1118.2 5888.9"

These are the constituents that, to start with, must be in the soil,
and which must be kept there. This array of what to many are but
obscure chemicals need not cause misgivings, since in most instances
nature has stored them in the virgin soil in abundant proportions.
Even in well-worn, long cultivated fields, some of them may exist in
sufficient quantity. Therefore, buying a special fertilizer is often
like carrying coals to Newcastle. Useless expenditure may be incurred,
also, by supplying some, but not all, of the essential ingredients. A