16 
N. C. AGRICULTURAL EXPERIMENT STATION. 
TABLE I. Existence of Nitrates in Yellow Tobacco at Different Stages 
of Growth 
Station No. 
Part of Plant. 
Where Sampled. 
When Sampled. 
Per ct. Nitro¬ 
gen existing 
as Nitrate. 
Total Nitrogen 
not existing 
as Nitrate. 
6007 
Roots___ 
From plant-bed_ 
May 29, 1889.. 
None. 
2.32 
6008 
Stalks .... _ 
4 4 4 4 
4 4 4 fc 
0.15 
1.83 
6009 
Leaves _ 
4 4 4 4 
4 4 4 4 
None. 
4.22 
6010 
Stems.— 
4 4 4 4 
4 4 4 4 
0.22 
2.11 
6011 
Roots _ 
From field ... _ 
June 27. 1889... 
0.07 
2.04 
6012 
Stalks . 
4 4 4 4 
4 4 4 4 
0.51 
2.01 
6013 
Leaves _ 
4 4 4 4 
4 4 4 4 
0.09 
5.56 
6014 
Stems .... . 
4 4 4 4 
4 4 4 4 
0.77 
1.87 
6015 
Leaves (primed)_ 
4 4 (4 
4 4 4 4 
None. 
3.82' 
6016 
Stems (primed)_. 
4 4 (4 
4 4 4 4 
0.51 
1 43 
6017 
Roots _ 
4 4 4 4 
July 11, 1889. 
None. 
1.38 
6018 
Stalks .. 
4 4 4 4 
• 4 4 14 
None. 
1.01 
6019 
Leaves .... 
4 4 4 4 
4 4 4 4 
None. 
2.71 
6020 
Stems . - _ 
4 4 i 4 
4 4 4 4 
None. 
0.99 
6021 
Leaves (primed)_ 
4 4 4 4 
4 4 4 4 
None. 
1.95 
6022 
Stems (primed) _ 
4 4 ‘44 
4 4 4 4 
None. 
1.04 
6023 
Tops ..__ 
4 4 4 4 
4 4 4 4 
4.50 
6024 
Suckers_.. 
4 4 4 4 
July 27, 1889. 
None. 
3.95 
6025 
4 4 
4 4 4 4 
Aug. 12, 1889... 
None. 
3.57 
6026 
i 4 
4 4 4 4 
Aug. 31, 1889... 
None. 
3.04 
6027 
Roots... 
(4 4 4 
Sept. 2, 1889.. 
None. 
0.99 
6028 
Stalks __ 
4 4 4 4 
4 4 4 4 
0.03 
0.88 
6029 
Leaves . _ _ 
4 4 4 4 
4 4 4 4 
None. 
1 94 
6030 
Stems „ ..._ 
4 4 4 4 
4 4 4 4 
None. 
0.69 
6031 
Roots_ __ 
From barn__ 
Sept. 9, 1889... 
None. 
1 . 1 T 
6032 
Stalks . ... 
4 4 4 4 
4 4 4 4 
Trace. 
1.41 
6033 
Leaves (smokers)... 
4 4 4 4 
4 4 4 4 
None. 
1.98 
6034 
Stems “ — 
4 4 4 4 
4 4 4 4 
None. 
0.69 
6035 
Leaves (tips) 
4 4 4 4 
4 4 4 4 
None. 
1.93 
6036 
Stems “ _ 
4 4 4 4 
4 4 • 4 
None. 
0.93 
6037 
Leaves (fillers)_ 
4 4 4 4 
4 4 4 ( 
None. 
2.17 
6038 
Stems 
4 4 4 4 
<£ a 
None. 
0.80 
6039 
Leaves (cutters)_ 
4 4 4 4 
4 4 4 4 
None. 
2.01 
6040 
Stems “ _ 
4 4 4 4 
4 4 4 4 
None. 
0 80 
6550 
Sppd 
None. 
3.36 
6553 
Second growth . _ 
None. 
1.55 
Following is a table (II) giving the percentage of both organic 
and nitric nitrogen in a few samples of tobacco stems analyzed at the 
Station. It will be observed that the North Carolina stems are very 
low in nitrates, while the other varieties contain a considerable 
amount. The percentages of phosphoric acid, and the soluble and 
insoluble potash are included as matters of interest. 
