THE  RURAL  NEW-YORKER 
January  % 
Notes  from  the  Rural  Grounds. 
Potato  Experiments  During  a  Dry  Season 
and  in  a  Variable  Soil. 
Poes  the  high-grade  potato  fertilizer 
furnish  enough  nitrogen  ? 
* 
Does  it  pay  to  use  nitrate  of  potash  (salt¬ 
peter)  rather  than  nitrogen  and 
potash  in  other  forms  ? 
* 
SERIES  II, 
Average  fertility  of  the  soil  per  acre  of  this 
plot  as  shown  by  no-manure  trenches , 
Nos.  45,  54  and  59,  263.38  bushels, 
as  against  209.91  bushels  in 
the  Itrst  series. 
Trench  No.  40— 440  pounds  Stockbrldge  Potato  Manure 
Yield,  per  acre.  Large  tubers .  287.83 
Yield,  per  acre.  Small  tubers .  51.33 
Total  yield,  per  acre . 339.16 
No.  41.— 440  pounds  Stockbridge. 
55  pounds  nitrate  soda. 
Yield,  per  acre,  barge  tubers . v..  ..  269.50 
Yield,  per  acre.  Small  tubers .  51.33 
Total  yield,  per  acre .  320.83 
No.  42.— 440  pounds  Stockbrldge. 
110  pounds  nitrate  soda. 
Yield,  per  acre.  Large  tubers .  249.33 
Yield,  per  acre.  Small  tubers  .  58.66 
Total  yield,  per  acre .  307.99 
[One  rotten  potato.] 
No  43.— 440  pounds  Stockbrldge. 
220  pounds  nitrate  soda. 
Yield,  per  acre.  Large  tubers .  243.83 
Yield,  per  acre.  Small  tubers .  80.66 
Total  yield,  per  acre .  324.49 
No.  44.— 440  pounds  Stockbrldge. 
330  pounds  nitrate  soda. 
Yield,  per  acre.  Large  tubers . . 242 
Yield,  per  acre.  Small  tubers .  69.66 
Total  yield,  per  acre . 311.66 
No.  45. — No  manure. 
Yield,  per  acre.  Large  tubers .  258.50 
Yield,  per  acre.  Small  tubers .  62.33 
Total  yield  per  acre .  320.83 
No.  46.— 880  pounds  Stockbrldge. 
Yield,  per  acre.  Large  tubers .  275 
Yield,  per  acre.  Small  tubers .  51.33 
Total  yield,  per  acre .  326.33 
No.  47.— 880  pounds  Stockbrldge. 
55  pounds  nitrate  soda. 
Yield,  per  acre.  Large  tubers .  240.16 
Yield,  per  acre.  Small  tubers .  47.66 
Total  yield,  per  acre .  287.82 
No.  48.— 880  pounds  Stockbrldge. 
110  pounds  nitrate  soda. 
Yield,  per  acre.  Large  tubers .  319 
Yield,  per  acre.  Small  tubers .  55 
Total  yield,  per  acre .  374 
No.  49.— 880  pounds  Stockbrldge. 
220  pounds  nitrate  soda. 
Yield,  per  acre.  Large  tubers .  291.50 
Yield,  per  acre.  Small  tubers .  47.66 
Total  yield,  per  acre .  339.16 
No.  50.— 880  pounds  Stockbrldge. 
55  pounds  nitrate  potash. 
Yield,  per  acre.  Large  tubers .  407.00 
Yield,  per  acre.  Small  tubers .  47.75 
Total  yield,  per  acre .  454.75 
No.  51.— 880  pounds  Stockbrldge. 
110  pounds  nitrate  potash. 
Yield,  per  acre.  Large  tubers .  289.66 
Yield,  per  acre.  Small  tubers  .  81.16 
Total  yield,  per  acre .  320.82 
(15  rotten  potatoes.) 
No.  52. — 880  pounds  Stockbrldge. 
220  pounds  nitrate  potash. 
Yield,  per  acre.  Large  tubers .  234.66 
Yield,  per  acre.  Small  tubers .  42.16 
Total  yield,  per  acre .  276.82 
(14  rotten  potatoes.) 
No.  53.— 880  pounds  Stockbrldge. 
440  pounds  nitrate  potash. 
Yield,  per  acre.  Large  tubers .  262.16 
Yield,  per  acre.  Small  tubers .  40.33 
Total,  per  acre .  302.49 
(Two  rotten  potatoes.) 
No.  64.— No  fertilizer. 
Yield,  per  acre.  Large  tubers .  146.66 
Yield,  per  acre.  Small  tubers .  40.33 
Total  yield,  per  acre .  186.99 
(Two  rotten  potatoes.) 
No.  55.-1,320  pounds  Stockbrldge. 
Yield,  per  acre.  Large  tubers .  253  00 
Yield,  per  acre.  Small  tubers .  42.16 
Total  yield,  per  acre .  295.16 
(11  rotten  potatoes.) 
No.  56.-1,320  pounds  Stockbrldge. 
110  pounds  nitrate  potash. 
Yield,  per  acre.  Large  tubers . .* .  275.00 
Yield,  per  acre.  Small  tubers .  53.16 
Total  yield,  per  acre .  328.16 
(11  rotten  potatoes.) 
No.  57.-1,820  pounds  Stockbrldge. 
110  pounds  nitrate  soda. 
Yield,  per  acre.  Large  tubers .  231.00 
Yield,  per  acre.  Small  tubers .  36.66 
Total  yield,  per  acre .  267.66 
(20  rotten  potatoes.) 
No.  58.-1,320  pounds  Stockbrldge. 
110  pounds  sutphate  potash. 
Yield,  per  acre.  Large  tubers _ * .  324.50 
Yield,  per  acre.  Small  tubers .  51.53 
Total  yield,  per  acre .  376.03 
(Five  rotten  potatoes.) 
No.  59.— No  fertilizer. 
Yield,  per  acre.  Large  tubers .  245.66 
Yield,  per  acre.  Small  tubers .  36.66 
Total  yield,  per  acre .  282.32 
(One  rotten  potato.) 
It  will  be  seen  that 
No.  40— Stockbrldge  alone,  440  lbs.,  yielded  339,16  bus. 
No.  46 — Stockbrldge  alow,  880  lbs.,  yielded  326.33  bus. 
No.  55— Stockbrldge  alone,  1,320  lbs.,  yielded  295.16  bus. 
Or  an  average  of  320.21  bushels  to  the  acre. 
As  in  the  first  series,  no  increase  of 
crop  is  given  by  the  larger  amounts  of 
fertilizers. 
The  same  amounts  of  Stockbridge  with 
55  and  110  pounds  of  nitrate  of  soda  ad¬ 
ded,  gave  the  following  yields  : 
No.  41. — 440  lbs.  Stockbridge, 
65  lbs.  Nitrate  soda, 
•  yielded . . .  320.83  bus. 
N„.  «•-»!£  fjggjijjk  (rMSed....  287.82  bus. 
NO.  «>«*»;  [ yielded  ..  287.86  bus. 
Or  an  average  of  292.10  bushels  to  the  acre,  or  28 
bushels  per  acre  less  than  the  same  amounts  of  Stock- 
bridge  without  any  addition  of  nitrate. 
N0'  "-fci&SKSMS.  («— . *«»»• 
N0'  *h1!oib7tflS“X,  . *»•»»•• 
No.  57—1,320  lbs.  Stockbrldge,  I  . 
110  lbs.  Nitrate  sodk,  (yielded  ..267.66  bus. 
Or  an  average  of  about  317  (316.55)  bushels  to  the 
acre  or  about  three  bushels  less  per  acre  than  when 
the  same  amounts  of  Stockbrldge  were  UBed  without 
any  addition  of  nitrate. 
No.  43—440  lbs.  Stockbrldge, 
220  lbs.  Nitrate  soda, 
No.  49—880  lbs.  Stockbridge, 
220  lbs.  Nitrate  soda, 
No.  57— 1,320  lbs.  Stockbrldge, 
110  lbs.  Nitrate  soda, 
Or  an  average  of  310.44  bushels  to  the  acre  or  about 
10  bushels  per  acre  less  than  the  same  amounts  of 
Stockbrldge  without  any  addition  of  nitrate. 
►  yielded . 324.49  bus. 
-  yielded . 839.16  bus. 
j- yielded... 267.66  bus. 
No.  44 — 440  pounds  of  Stockbridge  and 
330  pounds  of  nitrate  gave  312  bushels  to 
the  acre  or  27  bushels  less  per  acre  than 
when  440  pounds  of  the  Stockbridge  was 
used  alone  as  in  trench  No.  40,  or  8 
pounds  less  than  the  average  of  Stock- 
bridge  alone. 
While  440,  880  and  1,320  pounds  to  the 
acre  of  the  Stockbridge  alone  gave  an 
average  of  320  bushels  to  the  acre,  the 
addition  to  the  above  of  55,  110,  220  and 
330  pounds  of  nitrate  of  soda  to  the  acre 
gave  316.70  bushels  to  the  acre — a  loss  of 
about  three  bushels  to  the  acre  as  com¬ 
pared  with  those  trenches  which  did  not 
receive  nitrate  of  soda  beyond  that  which 
was  in  the  Stockbridge  fertilizer. 
In  the  first  series  of  experiments  it  will 
be  seen  that  the  additional  nitrate  added 
to  the  Mapes  Potato  Fertilizer  reduced 
the  yield  at  the  rate  of  20  bushels  per 
acre. 
As  in  the  first  series  of  which  this  is  a 
duplicate,  merely  substituting  Stock- 
bridge  for  Mapes,  the  results  of  using 
nitrate  of  potash  in  place  of  nitrate  of 
soda  may  be  compared,  the  object  being 
to  determine  whether  the  made-up  fertil¬ 
izers  contain  enough  potash  as  well  as 
nitrate. 
No.  50. — 880  lbs.  Stockbrldge, 
55  lbs.  Nitrate  potash, 
yielded..  454.75  but 
No.  «-5»,»»-Hg£™gJ«3liPWaM..  320.82 but 
270.82 bu, 
lelded..  302.49  but 
No.  56. — 1,320  lbs.  Stockbridge, 
110  lbs.  Nitrate  polish,  (yielded..  328.16  but 
No.  52.— 880  lbs 
220  lbs 
No.  53.— 880.  lbs.  Stockbrldge,  | 
440.  lbs.  Nitrate  potash,  f  J 
The  average  yield  from  the  addition  of 
nitrate  of  potash  was  337  bushels  to  the 
acre,  an  increase  over  the  same  quantities 
of  nitrate  of  soda  used  of  21  bushels  to 
the  acre  and  of  17  bushels  over  the  Stock- 
bridge  used  alone.  In  the  first  series  the 
nitrate  of  potash  increased  the  yield  39 
bushels  per  acre  over  nitrate  of  soda  and 
19  bushels  increase  over  the  Mapes  used 
alone. 
In  No.  58,  110  pounds  of  sulphate  of 
potash  was  added  to  1,320  pounds  of 
Stockbridge,  as,  in  trench  No.  19  of  the 
first  series,  the  same  amount  of  sulphate 
of  potash  was  added  to  the  Mapes.  The 
yield  was  376.00  bushels  to  the  acre,  or  an 
increase  over  the  average  of  nitrate  of 
soda  of  60  bushels  and  over  the  nitrate  of 
potash  of  39  bushels. 
In  the  first  series  the  sulphate  gave  an 
increase  over  nitrate  of  potash  of  16  bush¬ 
els,  and  over  nitrate  of  soda  of  56  bush¬ 
els. 
It  may  be  worthy  of  consideration  that 
in  the  above  trials,  no  rotten  potatoes 
were  found  in  the  first  series.  In  this 
series,  in  the  three  trenches  not  fertilized 
but  two  rotten  potatoes  were  found  while 
in  nine  of  the  fertilized  trenches  81  rotten 
potatoes  were  found. 
VINE  GROWTH, 
As  in  the  first  series  the  condition  of 
the  vipgg  was  estimated  by  three  persons 
on  June  14—10  denoting  the  maximum 
and  one  the  minimum  vigor  : 
NO.  40 .  6)4  No.  47 .  7  No.  54 .  4 
No.  41 .  7)4  No.  48 .  8X  NO.  55 . 8 
No.  42 .  8  No.  49 .  9)4  No.  56 .  8)4 
No.  43. . 8)4  No.  50. .  9  No.  57 . 8% 
No.  44 .  8  No.  51 .  7)4  NO.  58 .  7 % 
No.  45 .  5%  No.  52 .  8  No.  59 .  4% 
No.  46 . .  7)4  No.  53 .  m 
For  an  account  of  the  land  and  how  it 
has  been  treated  see  page  832  Novem¬ 
ber  28. 
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