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PHYSIOLOGY OF NUTRITION. 



is kept throughout slightly acid. If we attend to this point, the 

 plants flourish well. The following solution may also be strongly 

 recommended : 1000 c.c. of distilled water, 0'15 gr. Magnesium 

 sulphate, 0'12 gr. Calcium chloride, 0'12 gr. Potassium sulphate, 



Fia. 22. Maize Plant grown by the water-culture method in a nutrient solution devoid 

 of nitrogenous compounds. 



0'50 gr. acid Ammonium phosphate, and a very little Ferric 

 chloride. Before using the solution, we add ammonia till its 

 reaction is only slightly acid. The solution must be renewed 

 frequently, say every five days. It is a question whether the 



