TiiK Blli.ktix 9 



with the following ivsults : "In 1SU4 the limed land produced 395 

 pounds of corn to the acre, the unlinied 320. The limed land produced 

 315 pounds stover, the unlinied 255. From 189G-18D9 the total hay pro- 

 duced on limed land was 2,021 pounds, and on the unlinied land S95 

 pounds. In 1900 the limed land produced 550 pounds of corn to the 

 acre, the unlinied 496; in 1900 the corn stover produced on limed land 

 was ()66 pounds, un uiilimcd 592 pounds." 



This Station, comnientin^ on certain other fertilizer results, states: 

 "Double superphosphates j)articularly, and, in some instances, dissolved 

 bone black and acid phosphate, proved relatively inefhcient on unlinied 

 land, while basic slag has proved throughout to be a highly efficient 

 phos])hatic manure. Its relative efficiency has been particularly high 

 where those plants have been grown which are helped by liming. This 

 is doubtless due in part to the fact that it contains far more lime than 

 bone meal or iioats." 



In E. S. R., Vol. 2, page 12, Dr. Kellner, in reporting the results of 

 experiments in the use of lime in preserving the assimilability of phos- 

 phoric acid, states : ''The results of these experiments prove plainly that 

 in the to]> soil of the paddy field the presence of lime had an action 

 DKCIDEDLY BENEFICIAL TO THE PRESERVATION OF 

 THE ASSIMILABILITY OF THE PHOSPHORIC ACID AP- 

 PLIED IN THE SOLUBLE FORM, and that, under the conditions 

 of the experiment, the maximum effect was obtained with from one to 

 two and one-half per cent of lime in the air-dried soil. Where one per 

 cent of lime was added there was nearly twice as much phosphoric acid 

 soluble in ammonium citrate solution as where no lime was added; and 

 it even appears that upon a longer action of the lime, after two months, 

 some of the phosphorus PREVIOUSLY PRECIPITATED IN A 

 MORE INSOLUBLE FORM WAS RENDERED SOLUBLE IN CI- 

 TRATE SOLUTION BY THE PRESENCE OF TWO AND ONE- 

 HALF PER CENT OF LIME. Dr. Kellner adds that "In the ma- 

 jority of cases, as in the sandy, clayey or ordinary loam soils of our 

 paddy fields, a moderate percentage of lime applied previous to the 

 application of superphosphate will certainly secure a good effect of its 

 phosphoric acid on the crop, especially if the soils are ferruginous and 

 will otherwise favor the formation of the less assimilable basic phos- 

 phates of iron and aluminum. For the same reasons, in every limed 

 soil, superphosphates are sure to have a good effect." 



Dr. G. A. Frapps, of the Texas Experiment Station, in Bulletin 178, 

 states: "When nitrogen and potash are applied, the addition of carbon- 

 ate of lime at the rate of one-half of one per cent, or five tons an acre, 

 increased the size of the crop and the amount of phosphoric acid with- 

 drawn from the soil phosphates on six soils tested in pot experiments. 

 The effect of the lime was small at first, but usually increased with suc- 

 cwding crops. With the six soils, which gave up phosphoric acid equal 

 to from five to eighteen bushels of corn an acre per crop, the addition 



