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HORTUS GRAMINEUS WOBURNENSIS. 



productive natural pastures no deficiencies of plants are to be 

 found, every part of the surface is closely interwoven with plants ; 

 and not as in pastures artificially formed of one or two species of 

 grass only, where the surface is merely shaded or covered by the 

 foliage of the comparative thinly-growing plants. A rough uneven 

 surface will require a much greater quantity of seed, than land 

 with a dry, finely-pulverized, smooth, consolidated surface. If 

 the surface is wet at the time of sowing, a greater quantity of seed 

 will be required than otherwise would be necessary. The seeds 

 of most of the essential permanent pasture grasses are so small 

 and light, as to be readily taken up in clumps by the harrow or 

 roller passing over a damp surface. 



The following statements will perhaps place in a clear light 

 the quantity of plants of grasses which should stand on any 

 given space of ground ; or the closeness in which the plants of 

 grasses, when a number of different species are combined together, 

 require to grow, in order to form the most productive, unfailing, 

 permanent sward. 



The number of distinct plants of grasses, and the number 

 of distinct species of grass, which are found combined in a space 

 of one foot square of the turf of the following natural and artificial 

 pastures : 



