REVIEW OF THE BOOK 297 



duetivityf Wliat was Ji-tliro TulTs theory of the vnliio of tho 

 ntiiiit; of the soil by lueuiis of tillage ^oUr) f How important wan 

 Tull'8 work, and whyt 



III what gent ml way may thi» strupturo of the soil be improved T 

 What is uifaiit by making t lie land " mellow "f What kind of landn 

 are mostly improved by being made melluwT What kind of lands 

 are improved by being made compact or retentivef Name tho 

 three ways ia which the size of the soil particles may bo inotlified. 

 NN'hat are the general uses of nnder-drainageT May nnder-diain- 

 ing improve diy lands? What is the water taMeT How is it 

 raotliriid by ninler-draininirT What ia an amendment f How does 

 it improve or moilify the «"hnraclerof the soil? What efTfct may 

 limo have when added to the Boil usido from directly furniching 

 plant foodT Name materiaU from which hnmiis may l>e derived. 



What are the values of stable nianuresT Does their value lie 

 alone in the amount of plant food that they containf Illustrate 

 the vrilue of good soil texture by tlio j)ractiie of the flt>rist. 



Let tho class read aloud and in concert paragraph 60, 



Chapter 3 



It is important that tli»' i»ni>il p't a linn p-nsp 

 on tii(» stiiK'tinv of this chapter, ('oncrrnini]: ////' 

 moislitrr in (hr soil. Notice that it is (livi(h<l 

 into fonr co-onliiiatc parts: 



(1) Why moisture is important. 



(2) II«»\v tho watiM* is hoM in the soil. 



(.'?) How the inoisttire-hoMin<^ capacity of tlie 

 soil nnty he increasc«l. 



(4) The saving of the soil moisture. 



Since crop.s oftener fail for lack of moisturo 

 than for lack of i^lant-food, it is very important 

 that this chapter he ^iv^n rn-.>rii1 .•<.ii<i.l.-r;if n.n. 



