66 



quantity of potash best adapted to cane. Potash was used in the 

 form of muriate, sulphate, nitrate, carbonate, and kainit, in quanti- 

 ties representing- (iO. 1-20, and 180 pounds of actual potash per acre, 

 or one-third, two-thirds, and full rations for the three quantities. 

 For each form of potash there was a gToiip of 3 plats for the three 

 quantities, making, with the matured plats, which had no potash, 

 and the unmanured, 25 plats. The experiments were made on second- 

 year stubble cane. Results are given in tabular form. The car- 

 bonate of potash and ashes of cotton-seed hulls did not bring the 

 results expected. With potash in the other forms the increase in 

 yield was considerable. 



PhosphoT'le (K-'/d fertilizers — >S pedal phosphoi'ic acid experhnent 

 (pp. 222, 228). — The object of this experiment was to test the form 

 and (Quantity of ])hosphoric acid l)est adapted to cane. The phos- 

 phoric acid was used in the soluble foi'm in dissolved bone-black and 

 acid phosphate: in the ''precipitated" form in "precipitated bone- 

 black" and acid phosphate; and in the soluble form in bone-dust, 

 in the finely ground Charleston i)]iosphate ciilled " floats " and in 

 Orchilla guano. Each was used in a grouj) with three quantities, 

 one-third, tAvo-thirds. and full raticni. The general ])lan was similar 

 to that of the experiments with potash above de cribed. A part of 

 the experiment Avas injured by defective stand, nnd the results were 

 everywhere so irregular that definite conclusior.s could not l)e drawn. 



Experiments ivith common commercial fertilizers (pp. 224-228). — 

 The object here Avas to test the A-alue of certain popular fertilizers, 

 and also the quantity most desirable. The trials Avere made on 

 second-year stubble. Cotton-seed meal antl tankage Avere used alone 

 and in combination Avith acid jjhosphate, '" floats," kainit, ashes, cot- 

 ton hulls, etc., on 35 plats. The results are stated in tabular form. 

 Taking the produce as the measure of the action of the fertilizer in 

 each case, sulphate of ammonia and dried blood Avere about equally 

 A'aluable as sources of nitrogen. Inspection of the table shoAvs also 

 that " large tonnage is not ahvays productive of largest sugar yields, 

 and, therefore, manuring shoidd be done judiciously both as to quan- 

 tity and quality." 



Tiled vs. untiled land (pp. 228-233).— To test the eflect of tile 

 drainage, tAvo plats, one tiled and the other untiled, were planted 

 Avith cane in 1887. They Avere each subdivided into ID plats, of Avhich 

 6 Avere unnumured and the rest treated Avith fertilizers of A'arious 

 kinds, including cotton-seed meal, acid phosphate, kainit, bone-dust, 

 Orchilla phosphate, and cotton-seed-hull ashes, singly and in combi- 

 nation, thus making tAvo sets of experiments, alike as to manuring 

 and cultivation, but differing in that in one the land Avas drained and 

 in the other undrained. The details as to produce, chemical com- 

 position, and yield of sugar are given as in previous experiments. 

 The average increase of yield of all the tiled jolats over the untiled 

 was at the rate of 4.37 tons ])er acre. The general results for the 

 tAvo years, 1887 and 1888, strongly favor tile draining. Besides 



