202 OPEN AIR GRAPE CULTURE. 



CIIAPTEE XI. 



MANURE. 



Manure^ may be defined to be anything added to 

 the soil to increase its fertility, whether by mechani- 

 cal or chemical action. Substances serving the first 

 purpose have been alluded to under the head of soils. 

 The latter will now occupy our attention. 



In a former chapter sufiicient practical directions 

 were given for the preparatory enrichmxcnt of the soil 

 and for the annual top-dressing of tlie borders ; it will 

 now be our object to consider in detail tlie character 

 of the nutriment required by the vine ; the sources 

 whence it may be derived ; the various modes of its 

 application ; and its effects upon the plant. 



It is a well-established fact, that unless the soil in 

 which any plant is placed contains all the elements 

 necessary to the formation of such plant, no healthy 

 groAvth can ensue. Hence our first step must be to 

 inquire into the chemical constitution of the grape- 

 vine, or at least of its ashes, those elements which 



* Query. — To what extent was Jethro Tull's idea of horse-hoeing', 

 as a substitute for manure, anticipated by those who first used the 

 word mmmre {manfieuvTer — to worlc with the hand), before it was em- 

 ployed to express the addition of matter to the soil, with a view to 

 increase its fertility? One old English author speaks of the Com- 

 monwealth of England as being " gouerned, administered, and 

 manured by three sorts of personr/' >tc. 



