INSTITUTE AND COLLEGE, PUSA, FOR 1907-09. 4.]^ 



amounts of nitrate, but it is not all washed out during 

 the same season; up to the present the deep gauges yield 

 large amounts in a very wet year, whilst the shallower 

 ones, although yielding also more in a year of heavy rain- 

 fall than in one of small precipitation, fall short of the 

 deep gauges in this respect, and then recover their position 

 in a year of short rainfall. The data are, however, meagre, 

 and in any case the subject is closely related to that of the 

 period when nitrates are principally formed and their sub- 

 sequent disposition in the soil, a subject which, though 

 understood fairly well for European conditions, is far from 

 being so for Indian soils. 



The monsoon of 1908 was such a weak one that practi- 

 cally no drainage was recorded from any of the four 

 gauges. The rainfall this year up to June 30th has been 

 considerably above the average. Up till May 31st, 1909, 

 5-15" of rain fell. In June 28-96" fell. Percolation 

 began in gauges Nos. 3 and 4 (the 3' gauges) on June 10th, 

 after 12-31" of rain (reckoning only June rainfall) had 

 fallen. In the 6' gauges, Nos. 1 and 2, percolation began 

 on the 11th and 12th June respectively. 



Much trouble is caused by the burrowings of various 

 insects into the gauges, and probably largely from this 

 cause gauge No. 2 (a 6' gauge) has leaked considerably, 

 and part of the drainage water from this gauge has had 

 to be ignored. 



7. Loss of Water from Soil. — The data relating to the 

 first year's records of the amount of water in the soil 

 at Pusa during the dry season 1906-07, and the deductions 

 made therefrom, have been published as a memoir, No. 6, 

 chemical series. The views put forward in that memoir 

 have been supported by further experiments in the field, 

 the results of which are about to be published. 



In order to gain experience of other soils, similar 

 records have been kept at the Cawnpore Agricultural 

 Station, and through the courtesy of Mr. C. Rudston 

 Brown, at Bhatowlia Indigo Factory in Behar, in addition 



