26 



Richard H. Boerker 



Check Soil Moisture Samples 11/14/14 

 Depth 5.0 cm. 



Name of Culture Moisture Per Cent. 



Open light 27.9 



Wet soil 24.1 



Loam 277 



Deep soil 28.2 



Medium depth 28.5 



Shallow soil 31.4 



These figures, obtained after more than two weeks of daily water- 

 ing, pretty well indicate the small amount of variation in moisture 

 content which results in a number of cultures under the same 

 conditions. 



Light was controlled in the greenhouse by means of shade 

 tents. The east bench of the room was divided into three parts 

 and the portions at the ends of the bench were covered with 

 cheese cloth. The central compartment of the three was not used 

 on account of the shading influence of the tent to the south of it. 

 (See page 33.) The tent intended to develop medium shade was 

 made of a medium grade of cheese cloth, while the tent intended 

 for the dense shade was constructed of a double layer of heavy 

 cheese cloth. The light values developed in these tents and in the 

 full light of the greenhouse as determined by a Clements photom- 

 eter are given below : 



Table of Light Values 



These values are based upon full sunlight just outside of the 

 greenhouse. These tables indicate that full greenhouse light is 

 approximately y 2 of full daylight and that the medium and dense 

 shade tents have values approximately % and % of full daylight 

 respectively. 



