«T6 Tin: KFFKCT OF MANURKS. 



tivation omisioiis instant war. A fjrasH likes tlio luist that can 

 1)0 got. It will t»wallow soda, but not whon it can got potash. 



"On j^'cnoral princiiilos, all nuinures tond to drivo out the 

 wta'ds by increasing tlio better herbage." 



Tills is certainly very satisfac^tory, but not truo in ovory par- 

 ticular. 



.\fiitvnil Mautd'is Ahine. — The leguminous plants woro largely 

 increased at the expense of the grasses and weeds. The grasses 

 l)roper scarcely increased at all, whilst the whole jilat was thickly 

 covered with perennial red clover and some other leguminous 

 ]ilants. 



Very dilTerent was tin* action of ammoniacal salts which caused 

 tho exclusive increase of tho grasses i)r()per, there being scarcely 

 a leguminous i)lant to be found upon the jjlot. 



Superphitsphale of liitif, Mhen used alone, slightly increased 

 the grasses aiul miscellaneous plants, diminishing tho legumin- 

 ous. It }»roved to be of littlo or no use. 



Ammouid imJfs alone but slighty increased the crop. The crop 

 was moderate and but littlo better than the plot unmanured. 



Fai'/iii/rtnl maun re gave a considerable increase of chiefly gram- 

 iiuiceous hay and some few weeds, such as Ruinex and Achillea, 

 Raniimtdtis, f'ariim, attributed chiefly to its mineral and nitro- 

 genous constituents. 



The general result is, that leguminous plants in the meadow 

 woro much increased in growth and assimilated more nitrogen 

 from unaided sources over a given area, when they were liberally 

 supplied with certain mixed or priuuirily soil constituents. 



Farmyard manure greatly encouraged the growth of the good 

 grass Poa trivialis and tho bad one Bromas mollis, and Avhen in 

 conjunction with ammonia salts the Dactylis glomerata, under 

 both conditions, Festuca duriuscula and F. pratcnsis were nearly 

 excluded, and Avena flavescens, A. puhescens, Agrostis vulgaris, 



