Apr. 26, 1924 
Salt Nutrition of Wheat 
393 
the 21 different solutions were added to the designated cultures. In the order of 
KHoP0 4 , Ca(N0 3 ) 2 and MgS0 4 , solution 17 had a molecular proportion of 4:2:2, 
and solution 20 one of 5:2:1. Since solutions 19 and 20 were outstanding in the 
fruiting phase from the viewpoint of yield of grain, a solution such as 20 might 
be considered from these results the best solution for all stages of growth. A1 
of these solutions named gave higher yields than the control solution of Shive’s 
having the molecular proportion 3.77:1.09:3.14. 
Considering the fruiting phase, since solutions 3 and 10 are so outstanding in 
producing a yield of grain as well as solution 19 or 20, and not markedly inferior 
to other solutions having high proportions of phosphorus and potassium, the 
fact is apparent that at maturity, a high proportion of nitrogen, compared to 
the phosphorus and potassium carriers, gives as high a yield of grain as a low 
molecular proportion of nitrogen and high proportion of phosphorus and 
potassium. 
SUMMARY 
These results emphasize the importance of nitrogen in the development of the 
wheat plant, and indicate that when there is a sufficient supply of nitrogen in 
the soil the plant will produce a maximum yield with less of the elements con¬ 
taining phosphorus and potassium. In practice, this means that where these 
elements are known to be deficient, smaller applications of fertilizers containing 
them are required if there is a liberal supply of available nitrogen. The nitrogen 
can of course be maintained or supplied by the use of legumes in the rotation, 
by green manure crops, and by the utilization of farm manures and crop residues. 
