TWENTY-FOURTH ANNUAL FRUIT-GROWERS* CONVENTION. 123 



The Greek prefix Deka to mean 10 units. 



Latin 



Hecto 



Kilo 



Myria 



Deci 



Centi 



Milli 



100 



1,000 44 

 10,000 " 

 ^ of a unit. 



tt$W " " " 



Proposed Table for the Measurement of Irrigation Water. 



1 Myra-inch 

 1 Kilo-inch 

 1 Hecto-inch 

 1 Deka-inch 

 1 Inch 

 1 Deci-inch 

 1 Centi-inch 

 1 Milli-inch 



10 Kilo-inches 

 10 Hecto-inches 

 10 Deka-inches 

 10 inches 

 10 Deci-inches 

 10 Centi-inches 

 10 Milli-inches 



inch. 



Table of Equivalents. 



1 Myria-inch 

 1 Kilo-inch 

 1 Hecto-inch 

 1 Deka-inch 

 1 Inch 

 1 Deci-inch 

 1 Centi-inch 

 1 Milli-inch 



129,600,000 

 12,960,000 

 1,296,000 

 129,600 

 12,960 

 1,296 

 129.60 

 12.96 



10,000 inches. 

 1,000 

 100 

 10 

 1 



•A 



TOW 



sals. 



Water is contained in the soil in three different states, as — 



1. Hydroscopic water; 



2. Capillary water; and, 



3. Water of percolation. 



Hydroscopic water is that which is not perceptible to the senses, but 

 is appreciated by a gain or loss of weight in the soil which acquires or 

 is deprived of it. 



Capillary water is that which is held in the fine pores of the soil by 

 the surface attraction of its particles. 



Water of percolation is that which fills the interstices in the soil and 

 would percolate through or filter out from the soil. 



An acre of ground contains 43,560 square feet. Allowing 100 pounds 

 per cubic foot of dry soil, we would have 4,356,000 pounds every foot in 

 depth. Let us make a reasonable assumption as to the reservoir capacity 

 of our soils. They will hold as hydroscopic and capillary water about 

 20 per cent of their weight. Assuming that our soils are only wet to a 

 depth of ten feet in the rainy season, we would have 8,712,000 pounds 

 of water stored in each acre of ground, or more than ten times the 

 amount of water necessary to raise 20,000 pounds of oranges per acre, 

 if all the water was available, which it is not. 



Professor King has estimated that it takes to raise different crops, 

 such as hay, barley, clover, etc., from 300 to 500 tons of water to make 



