86 CONTINUOUS CEOPPING 



nitrogenous manure should not be used. Such land is 

 already rich enough in nitrogen. True, a large amount 

 of the nitrogen in such soil may be unavailable for plant 

 foods but will be liberated by substituting 5 or 6 cwt. 

 of basic slag in place of the 4 cwt. of superphosphate. 



Again, on light, sandy, or gravelly land an equivalent 

 amount of phosphates in the form of bone-ash or 

 steamed bone flour may be substituted for the super- 

 phosphates. 



Where a green crop has been consmned on the land, 

 the only manure required will be the artificial dressing 

 mentioned above, although on poor land a little farm- 

 yard manure may be given as well. The above recom- 

 mendations are primarily intended for the late crop oi 

 potatoes. 



In the case of the " earlies,'* a little nitrogenous 

 manure may be used, as this crop requires a little push 

 in its early stages. For the early crop, therefore, from 

 I to 2 cwt. of nitrate of soda per statute acre may be 

 used. As a matter of fact I only give i cwt. of nitrate 

 of soda per statute acre, and if later in the season the 

 crop is cut down by frost or harsh winds, then I give 

 another cwt. of nitrate to help it to recover. 



The farmyard manure may be either spread on the 

 land and ploughed in, or placed at the bottom of the 

 drills before planting. Where inter-cropping or double- 

 cropping of potatoes is followed all the farmyard 

 manure is to be placed under the first-planted crop. 

 The later variety or the inter-crop will get benefit from 

 this dung in the remoulding. 



As to the artificials, I give half of the phosphates and 

 the potassics to the earlies, sowing it on top of the 

 dung in the drills. The remaining half spread along 

 the alleys of the drills and work in with soil just 

 previous to planting the late varieties. 



