52 
WATER REQUIREMENT OF PLANTS. 
Table XL. — Water requirement of crops at Pusa, India, as modified by soils and fer- 
tilizers, according to Leather {1910, 1911). 
Crop and year. 
Soil. 
Weight of 
soil. 
Water requirement, using— 
No ferti- 
lizer. 
N 
N+P 
N+P+K 
Wheat ( Triticum sativum): 
1906-7 
Pusa 
...do 
Kilos. 
15-22 
15-29 
14 
48 
41-45 
43-45 
15-31 
14 
42.5 
12 
32 
12 
32 
14 
48 
43 
14 
48 
42-45 
14 
48 
14 
48 
14 
48 
14 
48 
14 
14 
14 
14 
14 
14 
47 
890 ±37 
821 ±75 
865 ±14 
582 ±11 
842±6 
526±31 
467 ±19 
421±21 
678 ±110 
447 ±8 
466 ±46 
614±29 
412 ±15 
737 ±15 
481 ±8 
603 ±11 
1,093 ±120 
1,094±150 
1,125 ±89 
678 ±1 
448±31 
873 ±210 
493 ±7 
836 ±120 
811±3 
1,427±79 
1,216±160 
361±76 
976 ±130 
254±42 
326 ±0 
1,109±82 
1,082±15 
388 ±70 
917±30 
581 ±35 
782 ±72 
545 ±10 
562 ±43 
508 ±24 
495 ±2 
569 ±14 
1907-8 
1908-9 
...do 
1909-10 
...do.... 
1909-10 
Akola 
Shillong... 
Pusa 
...do 
440±16 
1909-10 
580 ±10 
334±7 
Corn {Zea mays): 
1907 
485 ±25 
438 ±35 
529 ±32 
468 ±71 
521 ±16 
539 ±62 
261 ±13 
818±59 
302±7 
433±9 
315±5 
355 ±9 
287 ±8 
362 ±7 
363±4 
625 ±16 
384 ±6 
1908 
1908 
Akola 
...do 
367 ±15 
1908 
340±8 
1908 
Shillong... 
...do 
306 ±6 
1908 
1908 
Palur 
Pusa 
...do 
375 ±1 
Sarson (Brassica campestris): 
1908-9 
1909-10 
1909-10 
Akola 
Pusa 
...do 
479 ±13 
Linseed (Linum usitatissimum): 
1908-9 
1,198±83 
1,000±36 
633 ±39 
1909-10 
1909-10 
Akola 
Pusa 
...do 
787 ±8 
Barley (Hordeum vulgar e): 
190 8-9 
429±5 
482 ±30 
455 ±3 
551±51 
388±11 
531 ±65 
595±21 
976 ±130 
660±11 
437 ±41 
811±11 
263±2 
312 ±4 
640±31 
598 ±5 
212±1 
1909-10 
Oats (Avena sativa): 
1908-9 
...do 
827 ±37 
1909-10 
...do 
Peas (Pisum sativum): 
1908-9 
...do 
785 ±36 
1909-10 
...do 
Gram ( Cicer arietinum): 
1908-9 
. do 
1,166±120 
1909-10 
...do.... 
Juar (Andropogon sorghum): 
1908 
...do 
420 ±58 
850±97 
283 ±23 
266±6 
1,245 ±100 
1,050±140 
312 ±13 
Rice (Oriza sativa): 
1908 
. do 
Murwa (Eleusine coracana): 
1908 . 
. do 
Kodo (Paspalum scrobiculatum): 
1908 
.. do 
Rahar ( Cajan indicum): 
1908 
...do 
630 ±21 
Guar ( Cyamopsis psoralioides): 
1908 
...do 
Sugar cane (Sacchurum officinarum): 
1910 
...do 
von seelhorst's later experiments. 
Von Seelhorst (1910a) conducted experiments on the water require- 
ment of rye in pots which had been previously manured for several 
years. This experiment was conducted in the large pots shown in 
figure 4 and described on page 68. The results are shown in Table 
XLV (p. 56) . Referring to the water requirement of rye following rye, 
it will be seen that the lowest value was obtained by a light applica- 
tion of manure in the spring. The value obtained from a heavy 
application of manure in the fall was about 5 per cent higher, while 
the water requirement of the check pot, which had received no fer- 
tilizer, was about 19 per cent higher. The mean water requirement 
of the whole series receiving a heavy application of manure in the 
fall was also about 9 per cent higher than that of the series receiving 
a light application of manure in the spring. 
285 
