~ 
New York AGRICULTURAL EXPERIMENT STATION. 89 
matter steadily increased. From the date of full tasseling until 
ripe the dry matter increased 4.8 times or from 1,619 pounds to 
7,918 pounds per acre. From full silking until ripe the increase 
in dry matter was 2.5 times. Last year in our experiments we 
found no increase in albuminoids with B. & W. corn between the 
periods of full’ silk and watery stage of kernels. We note that 
while in this experiment for the same period of growth there was 
some increase in albuminoids, yet it was much less than for the 
previous or following period. 
CHEMICAL CHANGES IN THE ALBUMINOIDS. 
It is interesting to note the changes taking place in the albumi- 
noids during the period of growth. It is noticeable that there are 
— two periods of smallest gain in total nitrogen. 
Pounds of nitrogen per acre. 







‘Rotal - e S4DM. le amide 
nitrogen. nitrogen. nitrogen. 
July 80.5.2, PIRGBOL OU casei oo dsldvae seorse oti e: 38.37 | 27.36 11.01 
August 9... Blicodiieesitas: oy oe Oe, as 69.87 44.63 25.24 
August 7 ae POrOiB Al WMI Acs sata caters okies a 77.61 66.36 17.25 
September 7..... PRS AAC oa, ata So ealtels ts advent ss - 102.99 78.50 24.49 » 
September 23..... MSN ane ae weed Mace Ad Niassa Spcate's So as 108.47 91.06 17.41 




‘And there are also the periods of minimum amide nitrogen. 
Thus it appears-that between periods of silking and corn in milk 
. there is small gain in nitrogen, and this corroborates the work 
of last season with B. & W. corn. At this stage of growth the 
amide nitrogen is largely transformed into albuminoid nitrogen. 
Following the period just mentioned, corn in milk, there is a large 
increase in nitrogen, and the amide nitrogen increases in greater 
Be proportion than does the albuminoid nitrogen. It is at this period 
of growth that it is essential that there be present in the soil 
nitrogen in a form available as plant food. During the ripening 
_ stage there is little increase of total nitrogen, but the amide nitro- 
gen is transformed into albuminoid nitrogen. 
NITROGEN-FREE EXTRACT. 
It is in the nitrogen-free extract or carbohydrates that the 
ee - greatest increase has taken place, and to learn what is the nature 
Pee re hea 
_ of this increase was the object of our further investigation. 
12 
