i8 



Two Stoi! Plant. 



that an equal number of plants in each system of pruning \vere under 

 identical conditions. The depth of the soil of the beds in each house 

 was such that the roots had plenty of space to grow in. Plants, how- 

 ever, grown in shallow benches will show distinctly different features 

 from those grown in deep benches or in solid beds. Both houses were 

 provided with i 6 by 24 inch glass in the roof, and good light conditions 

 prevailed on the sides. The texture of the soil was practically the same 

 in both houses. Perhaps House No. 2, which had been used for 

 lettuce, had been more frequently manured and the soil in it contained 

 slightly more organic matter. 



