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STATE BOARD OF AGRICULTURE. 



Diagram I.— Moisture in first foot.— Line 1 (unbroken) per cent moisture in uncultivated plot: 

 line 2 (heavy broken), per cent moisture in frequently cultivated plot; line 3 (light and broken), 

 per cent moisture in plot under ordinary cultivation. Line of relative humidity shows the air to 

 be very dry when it approaches or goes below 80 per cent. Very moist when it reaches or goes- 

 above 90 per cent. 



