KEVIEW OF THK BOOK .30.') 



nitrogen is aiul what its SDurcos arc Wluit is amiuuninf Nitric 

 »iM«lf Nitrntif What i.i tiie n-lation of iiuuntH to iiitrogiMif What 

 is iiitrificiitiunf IIow is it liroii;;ht iihoiit f Is tho iiitrocfii of the 

 •tiuospbi-re UHi-il l>y |iiuiitMf If 8o, through what parts of the 

 plants is it taken u\<1 IIow uiiiy wo adJ couimerciul nitrogen 

 to liio soilf 



What is tlio chief oflico of phosphoric neiilT What crops uee 

 liberally of it T What are sourci'S of phoaplioric aoidf What is 

 nifaiit by the term pliosphatef What is an acid phospliatt-f 

 8ii|H'r|iliosphatu ( l4:Ui T Expiain the rtdatioiiships of phonphorio 

 acid to lime. What ia a " rcs'iTtptl" phosphatfT In what forms 

 are tho phosphatt-s found in comrnfrcial fortiliznisT 



What is Iho oflice of potaslif What art' the sources of supply f 

 Whence came tho oomnuM-cial potash salts! Explain what 

 muiiate and sulfate of potash are. 



Wiiat is an amcndincnl 7 Give rxamples. How does an 

 aroeiKltuent affect the soil? What effect may lime have on landf 

 In what form may it be ni>plifdf What do you understand by an 

 aciilT AlkaliT IIow niany snbhtances tuny be tfj-tid with rej,'ard 

 to H>-idity or alkalinity (lolia f Make the teat with vinegar and 

 with lye. 



What is a commercial fertilizerf What is meant by a "com- 

 plete" fertilizer f What is m.-ant by "guaranteed analvBisf 

 What is meant by tho " brand T " What are the relative com- 

 meninl values of nitrogen, phonphoric acid and potash f Fiirure 

 out tho coinmereial or estimated value of a t<>n of cotnmereini 

 fertilizer when tho piiarant«-ed analysis is given. How may you 

 determine whit ii tho v.ihio of coininorcial ferlilizerf 



Woulil you advise n«ing n complete fertilizer, or only one of 

 tho fertilizing elejuentnT Explain under what conditions. In 

 what kind of crops is nitrogen cWiflly nei-iledf Is tliere danger of 

 logins nitrniren from tho soilf Do potash Mn<l phoN|ihoriu acid 

 lend to leach out as mpid'v as nitrogen? In what aojla ia |eact«- 

 ing leant proiiounc»Mlf When are fertilizers npplied, bef«te or 

 after fitting tl»e Ian. If Explain tho six conditions that govern 

 the appli.-afioM of commer.-ial fertiTzem I .'» . Can definito rules 

 b« civen for the applicatioD of bu> h fertilixemf Whyf 



