THE ADAPTATION OF THE PLANT TO THE SOIL. . 15 



however, does regulate the supply of water to the plant, because soils 

 hold water in virtue of the amount of surface they possess, and this 



Table V. 

 Mechanical Analysis of Hop Soils. 



Formation 



Tbanet 

 . Sand 



Newiiig- 

 tou 



Alluvial 



Tbanet 

 Sand 



Brick 

 Eartb 



Teyn- 

 bam 



. Lower 

 Green- 

 sand 



Clay 

 with 

 Flints 



Loyter 

 ton 



Brick 

 Earth 



Ickham 



Upper 

 Green- 

 sand 



Hast- 

 ings 

 Beds 



Weald 

 Clay 



Hast- 

 ings 

 Beds 



Locality 



Yalding 



Barton 



East 

 Far- 

 leigb 



Beutley 



Eolveu- 

 den« 



Wood- 

 church* 



Ew- 

 hurst * 



Fine gravel . 



0-5 



3-5 



0-3 



0-8 



2-7 



0-9 



0-3 



6-6 



0-5 



0-7 



3-4 



Coarse sand 



18-2 



14-4 



2-5 



2-4 



11-0 



1-3 



0-8 



5-5 



0-6 



3-0 



2-1 



Fine sand . 



61-6 



440 



38-0 



44-2 



35-3 



2S-2 



2G-3 



29-7 



27-3 



171 



15-4 



Silt . 



89 



18-2 



39-6 



29-6 



22-8 



46-5 



47-7 



29-0 



33-3 



28-2 



23-8 



Fine silt 



4-3 



9-9 



6-9 



9-7 



12-8 



8-9 



9-2 



14-4 



21-8 



27-6 



26-1 



Clay . 



6-5 



10-0 



12-7 



13-3 



15-4 



14-2 



15-7 



14-8 



16-5 



23-4 



29-2 



* These soils only grow the coarser varieties of hops successfully. 



Table VI. 

 Mechanical Afialysis of Barley Soils. 



Formation 



Lower 

 Green- 

 sand 



Lower 

 Green- 

 sand 



Tbanet 

 Sand 



Lower 

 Green- 

 sand 



Tbanet 

 Sand 



Brick 

 Eartb 



Chalk 



Lower 

 Green- 

 sand 



Clay 

 with 

 Flints 



Chalk 



Locality 



Shalford 



Bashing 



Gold- 

 stoue 



Eepton 



Obislet 



Shop- 

 wyke 



Minster 



Alding- 

 ton 



Loyter- 

 ton 



Sutton * 

 by Dover 



Fine gravel . 

 Coarse sand 

 Fine sand . 

 Silt . 

 Fine silt 

 Clay . 

 Carbonate ) 

 of lime ) 



2- 7 

 56-2 

 28-0 



5-2 



3- 8 

 41 



1-2 

 52-9 

 21-4 

 7-1 

 7-1 

 10-3 



0-2 

 16-4 

 48-2 

 18-6 

 70 

 9-6 



2-8 

 15-2 

 48-8 

 15-5 



7-2 

 10-5 



1-4 

 5-8 



35- 2 



36- 5 

 8-1 



130 



0-8 

 10 

 30-8 

 33-5 

 20-2 

 13-7 



0-6 

 9-7 

 38-4 

 27-9 

 7-4 

 16-0 



1-1 



19-9 

 341 

 11-3 

 11-3 

 22-3 



1-3 

 1-2 

 35-7 

 290 

 110 

 21-8 



0- 6 



1- 8 

 16-4 

 24-7 



7-6 

 27-7 



20-3 



* Though this soil contains a rather high proportion of clay for barley, it is kept open and easy- 

 working by the large amount of carbonate of bme that is present. 



Table VII. 

 Mechanical Analysis of Potato Soils. 



Formation 



Tbanet 



Lower 

 Green- 

 sand 



Bagshot 



Tbanet 



Bagshot 



Tbanet 



Chalk 



London 

 Clay 



Locality 



Swauley 



Nutfield 



Bisley 



Teyubam 



Claygate 



Green- 

 bithe 



Minster 



Ohessing- 

 ton 



Fine gravel 

 Coarse sand 

 Fine sand . 

 Silt . 

 Fine silt . 

 Clay . 



1-3 

 10-9 

 62-3 

 14-2 

 5-4 

 5-9 



3-2 

 50-8 

 250 

 3-8 

 9-6 

 7-6 



0-2 

 30-9 

 49-7 



5- 6 



6- 1 



7- 5 



0-5 

 lo-9 

 51-8 

 16-1 

 5-8 

 9-9 



0-8 

 27-2 

 42-2 

 12-3 



6-7 

 10-8 



0-3 

 2-2 



75-2 

 40 

 5-4 



12-9 



0-6 

 17-1 

 36-4 

 24-6 



6-8 

 14-5 



0-7 



19-3 

 35-8 

 16-9 

 10-2 

 171 



surface must increase the smaller the particles into which the given 

 weight of soil is divided. It has been estimated, for example, that the 

 total surface of the particles in a cubic foot of loam amounts to about 



