104 
COMPENSATION FOR THE UNEXHAUSTED 
MANURIAL VALUES OF FEEDING STUFFS 
AND FERTILISERS. 
The first attempt at putting on a really scientific basis the 
compensation to be awarded for the unexhausted manurial 
values of foods consumed on the farm was made by Lawes and 
Gilbert as long ago as 1870. 
After showing the fallacy of assessing compensation on the 
basis of the original “ cost ” of the materials, Lawes and Gilbert 
drew up a table of values founded upon the actual manurial 
constituents left in the dung after deducting what had been 
lost in the maintenance and live-weight increase of the animal, 
and also any loss incurred during making and storing of the 
manure. 
The Tables thus drawn up were first published in 1875. 
They were subsequently revised in the years 1885, 1897, and 
1898. 
Changes in the prices of manurial constituents, and increase 
of knowledge as the result of experience derived from experi- 
mental work, conducted alike at Rothamsted, Woburn, and on 
the Continent, with regard to the losses in the making of 
farmyard manure and the practical value of the manurial 
constituents of food in a rotation, led to a reconsideration of 
the scale. This was done by the present writers in 1902. 
The Tables, thus revised, met with general acceptance, and 
in large measure have replaced the local systems formerly in 
vogue. 
Time, however, has brought its changes again, and there 
has been a growing feeling that still further revision is 
required. Firstly, the prices of manurial ingredients have 
gone up, more especially in respect of the nitrogenous ones. 
Further, the inconvenience of spreading compensation over so 
long a period as four years has been increasingly felt. These 
circumstances induced the leading professional bodies connected 
with agricultural valuation to meet in conference, and ultimately 
the present writers were invited to again undertake a revision 
of the Tables, and to give replies to a number of questions 
which were raised in the progress of the discussion. We were 
further invited to deal, not only with foods consumed on the 
farm, but also to draw up, if possible, a scale of compensation 
for artificial and other manures used on the farm, but the full 
value of which had not been worked out by crop-growing. 
Our replies to these various questions are contained in the 
report recently issued (Octob'er, 1913) to the Central Association 
of Agricultural and Tenant Right Valuers, 
