PASTLKE6, MHADUNVi^, AM> 1 nKAi.l. 



199 



313<i. Observe how different the rocds ot cinv.r nmi timothy 

 are (Fips. "D, 80). One fooils in tlio suliHoil ntul Hulisurfiicc 

 soil, Las iiiaiiy little orjjanisnis on its rootU't», which nn* oulii-d 

 nit ro^;t>u- fixers (138); that is, they take tiio free iiitrnf^en of 

 the Boil air, and it then becomes of use to the plant. 

 The timothy has many Binall tibrous roots, which remain near 

 the surface, and have no nitropen-fixinff orpnnisms. It will be 



T\k. KJ. AUaita or li><>«nie {Mfdicago 

 iaiitat x%. 



FIk. 83. A good bottle for 

 »et>4l«. 



Moen how appmpriato it is to raise these plants together : one 

 frills near the surface, the other down de« p in the soil; ono 

 is lon}( IIvihI, the other short lived. 



31.s<i. In general farming, the most uniformly gcH)d cropi 

 are Hourly alwiiys obtained when ii rotation is u.ned. Fig. 81 

 is n fielil of wheat, in n rotation, which yielded owr 30 busbeU 

 to the acre. 



323d. The permanent meadows teach many valuable : 



if they are studied closely. Hero is often found a marked 



tration of the struggle for existence and of the survival of the 

 fitf'^t. Here the farmer can :- • - ' •■>, v,,|p by tillage, and 



