CELERY requires the use of dung more than almost any other crop, and it is little affected by artificial manures, except phosphates, which may be given in the form of superphosphate at the rate of 2-1/2 to 3-1/2 lb per square rod.
LETTUCE.
With dung.
3 to 4 lb. superphosphate
1/2 to 1 lb. nitrate of soda
Without dung.
3 to 4 lb. superphosphate
1 to 1-1/2 lb. nitrate of soda
1 lb. sulphate of potash
ONIONS never succeed without an ample supply of potash. This crop should therefore have farmyard dung, or the special potash fertilisers in adequate quantity.
With dung.
3/4 lb. nitrate of soda
4 to 5 lb. superphosphate
3/4 lb. sulphate of potash
Without dung.
1-1/2 to 2-1/2 lb. nitrate of soda
5 lb. superphosphate
1 lb. sulphate of potash
LEEKS require the same fertilisers as Onions, but will need little or no nitrate if good dung is used.
POTATO.—For good yield, high quality, and freedom from disease, Potatoes are dependent upon a good supply of potash. They do best when supplied with a moderate amount of farmyard manure, supplemented by suitable artificials, but can be grown on some soils with artificials alone.
With dung.
3/4 lb. sulphate of ammonia
3 lb. superphosphate
3/4 lb. sulphate of potash
Without dung.
1-1/2 lb. sulphate of ammonia
3-1/2 lb. superphosphate
1 to 1-1/2 lb. sulphate of potash
Instead of superphosphate, a mixture of this fertiliser with an equal amount of bone meal or basic slag may be used, and either 4 lb. of kainit and 1 lb. of muriate of potash instead of 1 lb. of sulphate of potash.
RHUBARB.—An annual dressing of dung is beneficial, together with 6 lb. of basic slag, 1 lb. of sulphate of potash, and 4 lb. of nitrate of soda, half the nitrate being applied when growth commences and the remainder a fortnight later.