41G 
Seioage- Farming. 
A necessity would exist for tlie use of 600,000 gallons, or 
about 265 tons, of sewage per diem, during the iniitcr as well 
as the summer months ; and 100 acres of land broken up and 
divided into portions which should receive alternate lloodings, 
would readily accommodate that amount of liquid, even sup- 
posing none were required in other quarters of the farm during 
that period. The question then arises whether this would suffice 
for the summer and hot-weather supply of 400 acres of land, 
for I assume at once that the 100 acres of cereals after green 
crops will require none. It will be observed that in my figures, 
on page 415, I have allowed for the purchase of 15 tons of 
superphosphate or non-ammoniacal manure, and by the applica- 
tion of this to the mangold, at the rate of 5 or 6 cwts. per acre, 
a vigorous start would be ensured to that plant, and the dangers 
which beset early irrigation would be obviated, at the same 
time that the supply of sewage would be economized. Culti- 
vated in this manner, it can scarcely be doubted that an occa- 
sional application of 100 or 200 tons per acre during the summer 
and hot weather would be ample to maintain the strength of 
the plant, and bring to maturity a satisfactory crop. 
The cabbage might be planted in May or June, on land also 
prepared by copious irrigation, and this crop and the rye-grass 
would require a considerable proportion of the available sewage 
to ensure a heavy return. If 100 tons of sewage should be equal to 
the production of one ton of grass (and I see no reason to doubt its 
power in this respect under good cultivation), 400,000 tons would 
be the quantity required for irrigating 100 acres of rye-grass for 
the production of 40 tons per acre, and I will endeavour to esti- 
mate the quantity required for the different crops, and compare 
it with the amount at disposal. 
Tons of Sewage available for application to Crops on Farm. 
Sewage in Tons. 
Eye-grass, 100 acres, at 4000 tons per acre 400,000 
Cabbage, 50 acres, at 2000 tons per acre 100,000 
Mangold, 50 acres, at 1000 tons per acre 50,000 
Market-garden, 100 acres, at 2000 tons per acre .. .. 200,000 
Wheat, 100 acres, at 2000 tons per acre 200,000 
Balance 50,000 
Total 1,000,000 
If it be objected that in these figures I have made no allowance 
for the inevitable winter waste in sewage, and that for the eight 
months of growth a total of about 666,000 tons onl}' would be 
forthcoming, I answer that I recognise no necessity for such waste, 
and that the land which receives the winter sewage should be 
laying up stores of ammonia which should be yielded up when 
