J7ie Lois Weedon Plan of Groxowg Wheat. 



603 



Table IV. — Showing the amoiints of Nitrogen (exclusive of Nitric Acid) in Tiothamsted 

 and Lois Weedon Soils and Subsoils. 



Nitrogen per Cent, in the Soils, calculated as Dry. 



• Plot 1 



Eotliamsted 



Eothamsted 

 Surface Soils, 

 adjoining 

 Experi- 

 mental Field 



'Lois - Weedon 

 Surface Soil 

 Lois - Weedon - Plot "I 



Subsoil / 



'Unnianured .. .. 

 [Mineral Manure 

 Ammoniacal Salts .. 

 Minerals and Am-'l 

 , mouiacal Salts . . J 



Experi- 

 ment 

 1. 



0'1416 



0-0730 



0-1560 

 0'1430 

 0-1530 



0-1520 



Experi- 

 ment 

 2. 



0-1418 

 O-07C3 



o-ur^o 



0-1529 

 0-1694 



0-1593 



Experi- 

 ment 

 3. 



0-15G0 

 0-1420 

 0-1620 



0-1545 



Experi- 

 ment 

 4. 



0-1.505 

 0-1567 



Mean. 



0-1417 



0-0746 



0-1523 

 0-1459 

 0-1587 



0-1556 



Lois Weedon ( 



Heavy Land Stubble 

 Heavy Lund Fallow 

 Light Land Fallow 

 Heavy Laud Subsoil 

 Light Land Subsoil 



Marl Pit 



Light Land Field . . 

 Rye - grass Subsoil, 

 with Liquid Manure 

 >Heavy Land Field 



0*1640 

 0-2020 

 0-1630 

 0-0661 

 0*0840 



0*0920 



0*0790 



Nitrogen per Acre about 1 foot deep^taken at 4,000,000 lbs. Di-y Soil. 



