Quantity of Water Consumed in Irrigation. 29 



separately, the duty is given at 192 acres.* The former 

 would apparently include the loss in the canal, and the 

 latter exclude it ; though to avoid error the author has made 

 calculations on each supposition. (see App. B). 



8. The small duty obtained in the two first divisions in 

 the cold season is explained in the report to be due to the 

 smallness of the area of cold weather crops irrigated, while 

 the high duty in the Etawah division is said to be due to a 

 large area having received only one watering late in the 

 season. So far as the author's notes go, he fails to find any 

 notice taken of the great difference of soil in the various 

 divisions, though it is too important a factor to have been 

 entirely overlooked. The author's notes are, doubtless, in- 

 complete on this point. The low duty year after year in 

 the upper part of the canal, where the soil is light and 

 sandy, and the high duty also year after year in the lower 

 parts of the canal, where much of the soil is heavy and 

 clayey, coupled with other facts to be presently noticed, lead 

 the author to look to the soil as the chief cause of this con- 

 stant difference. But, in order to allow due weight to the 

 difference in the watering of crops, the author proposes to 

 take (instead of the extreme results shown above) the 

 Anupshahr division as the type of a light soil, and the 

 Cawnpore division as the type of a soil partly sand and 

 partly clay. Fortunately, these are the two divisions with 

 which the author is best acquainted. 



9. Taking these two divisions as types of the two soils, 

 and confiniucr further attention to results obtained during 

 the cold season only, since the crops then grown in India 

 more nearly correspond with those grown in the southern 

 portions, at least, of Australia, while the monsoon as a 

 season has no counterpart here, the following figures are 

 obtained : — 



Light sandy soil 

 Mixed sand and clay soil 

 Average for the whole 

 canal . . 



Area 



irrigated 



per cubic 



foot per 



second. 



Quantity of 



water used 



per acre. 



Depth of 



water 

 over area 

 irrigated. 



acres. 



72 



149 



t 129 



cubic feet. 



183,000 



88,000 



102,000 



feet. 

 4-19 

 2-02 



2-34 



I See Appendix D. 



{ See a and q, 

 [ Appendix B. 



* Irrigation Eevenue Eeport of the North-western Provinces (India) for the 

 year 1875-76, page 17, par. 38 



