Dry farming in western Canada Dry farming in western Canada dryfarminginwes00brac Year: 1921 288 DRY FARMING may carry. It is possible that on some soils the use of one or more of these fertilizers might pay even now, but in the few tests that have been conducted (usually on good soils) they have not produced sufficient increase to warrant their use, except perhaps in truck farming or potato growing. The time will come, no doubt, when it Fig. 96.—Wheat Field at Fort Vermilion, Peace Rivsr. 700 miles by trail north-west of Edmonton, Alia. will be necessary to apply phosphorus, the supply of
Dry farming in western Canada Dry farming in western Canada dryfarminginwes00brac Year: 1921 288 DRY FARMING may carry. It is possible that on some soils the use of one or more of these fertilizers might pay even now, but in the few tests that have been conducted (usually on good soils) they have not produced sufficient increase to warrant their use, except perhaps in truck farming or potato growing. The time will come, no doubt, when it Fig. 96.—Wheat Field at Fort Vermilion, Peace Rivsr. 700 miles by trail north-west of Edmonton, Alia. will be necessary to apply phosphorus, the supply of which in our soils is not high; and we arc shipping it away in large quantities in the grain we sell. Nitrogen can be gotten from the air by growing legumes, and the potash supply in the soil is very high, but unfortunately there is no means of replenishing the phosphorus supply excepl by purchasing. It is in- teresting to note thai the use of phosphate fertilizers in some places results in an earlier crop of grain.
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