CONTEXTS 



Page. 



Introduction 7 



Experimental methods 8 



Physical conditions 9 



Light 9 



Temperature 10 



Saturation deficit 12 



Sum man- of physical conditions 13 



Effects of different light intensities on plants 14 



Mustard 14i 



Lettuce 15 



Radish 16 



Potato 16 



Cotton 17 



Corn 19 



General condition of the plants at the end of 30 days 20 



General condition of the plants at the end of 50 days 22 



Corn 22 



Other plants 22 



Effect of shade on the thickness of leaves 24 



General discussion 25 



Summary 2^ 



Literature cited 31 



279 5 



