bone meal and o>nr<>lite one-twelfth. The after effects of the basic 

 slag are superior to those of superphosphate, and it is again supe;i'>r 

 to superphosphates in soils deficient in lime. 



Liechti and Yogi experimented with oats by the pot-culture 

 method as carried out by Wanner. They used a meadow soil, poor 

 in phosphoric acid and which had never received any manure. 

 The same quantities of nitrogen and potash were added to each of 

 the mineral manures so that they should equal the bone manures 

 in that respect. The following are the results : 



These experiments of Liechti and Vogt's confirm what has been 

 discovered by others, that basic slag is equal to superphosphates in 

 some soils. We have seen that, as far as after effects in the soil 

 are concerned, bone meal compares very badly with basic slag or 

 superphosphates, although formerly the reverse opinion was held. 

 More information on this subject can be gained by reference to 

 some of Professor Maercker's experiments, undertaken at the 

 request of the Association of Bone-meal Manufacturers of Saxony. 

 The experiments were conducted i-\ the same manner as Wagner's, 

 by pot culture, which gave corresponding results in the field. They 

 proved the conclusions of Wagner and others as to the immediate 

 and after effects of the manure. 



Working with barley in a sandy soil, which is considered 

 favourable to bonemeal, each pot, in addition to the manure, to be 

 operated on, received an equal quantity of ammonium nitrate, 

 sulphate of potash, chloride of potash, sulphate of magnesia and 

 carbonate of lime. 



