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luxuriant as on Plot 2. This was so even in the first year's hay 

 crop, and is undoubtedly due to the collection of nitrogen from 

 the atmosphere by means of the nodules on the clover roots, and 

 to the stimulating effects of the nitrogen on the grasses. 



A further four acres of similar poor clay soil in the same field 

 was sown down a year later with the seeds' mixture of Plot 2, but 

 with cultivated white clover omitted; the seeds being again sown 

 on young wheat, after summer fallow. The resulting hay crops 

 in 1908 and in 1909 have been excellent, and there is now a beau- 

 tiful sward of white clover. This land received 10 cwt. per acre 

 of high quality basic slag after the wheat crop was removed in 1907, 

 and this has had a remarkable effect in developing the clover plants. 

 The crops of hay (per acre) averaged 32 cwt. in 1908, and 37 cwt. 

 in 1909 very satisfactory crops for this poor clay soil. 



The same seeds' mixture was sown 1908, with barley, on about 

 5 acres of poor clay soil in Upper Brick field. This was also 

 dressed with slag when the barley crop was removed, and the crop 

 of excellent hay produced in 1909 averaged 2 tons per acre. 



In 1909 the rotation hay in East Tower Hill field was a consi- 

 derably lighter crop than this (35 cwt. per acre) though up till 

 February there were good clover plants on this field, all produced 

 from cultivated clover seeds, principally red clover ; by May, how- 

 ever, the clover plants had practically disappeared, 'in common with 

 much of the young clovers throughout Northumberland last spring. 

 This disappearance of clover is, unfortunately, far too common in 

 Northumberland and the North of England, and is probably not 

 due to clover sickness only, but largely to cultivated clovers not 

 being hardy enough to stand the rigorous springs of the North. 

 The experiments already quoted indicate that where these clovers 

 are liable to disappear, the inclusion of a small amount, (say 2 Ib. 

 per acre) of wild white clover may be very useful, even in a seeds' 

 mixture for one year. 



It may ,be predicted with confidence that the inclusion of wild 

 white clover seed in a seeds' mixture for laying down land to hay 

 or pasture, especially on strong clay soils, will produce a sward 

 practically immediately, and if this be so the series of years hither- 

 to necessary to accomplish this will to a large extent be bridged 

 over. 



A remarkable result is the rapidity with which basic slag has 

 acted where this clover h&s been sown at Cockle Park. On Lord 

 Londonderry's estate at Wynyard (County Durham), where one of 



