170 



MACiXKSIA IMrUEGXATK]) SOIT,S. 



Solul)k' in i i)e]- cent, citrii- acid solution, 100 grms. 

 fine earth extracted with 100 c.c. 1 per cent, citric acid 

 solution for one week: — 



Katio of lime to niag-nesia (lime as 1) : — 



Hydrochloiic acid extract 



1 per cent, citric acid extract 



1 : 7-8 

 1 : 30 



1 : 0-5 

 1 : 0-9 



The soil ivoin which Xo. 307 Mas taken had during- the 

 two previous years been well worked and cropped to maize. 

 The yield of g-rain from first- and second-year land was, 

 lioAvever, less than a bag- (200 lbs.) ])er acre, and the retnni 

 was so unsatisfactory that the land has since been allowed 

 to revert to grass. 



On the land from which No. 150 G Avas taken, a manurial 

 trial has recently been conducted, and the check plots 



