54 



larger percentage is here found than in soils from any other part of 

 Negros. Much of this exists as the carbonate, as is shown by the 

 marked effervescence which takes place on treating almost any of the 

 Hog soils with acid. Nitrogen, only, appears to be a trifle low, espe- 

 cially in some of the sandy, "bombon" lands, but this is rather to 

 be expected in soils having the physical make-up of these under con- 

 sideration. It is evident that, as all the land here contains an excess 

 of plant food sufficient for both plant canes and ratoons, without con- 

 sidering the additional nutrient matter supplied each year by the 

 overflowing of the river, differences in productivity and in quality of the 

 cane for the greater part be due to the amount of care taken in cultivation, 

 together with the combined effects of the weather and the physical 

 composition of the soil. According to the quantity of rainfall in a 

 given year, a sandy soil may produce much more cane than a heavy 

 clay, or the reverse, so that only by means of experiments covering 

 many years, together with meteorologic observations during the same 

 period, would it be possible to state which type of soil was really best 

 suited to cane in this vicinity. However, a few cane analyses were 

 made here and are given in the following table: 



Gone analyses, district of Ilog-Cabancalan. 



