MANURIAI. VALUE OF ASHES, MUCKS, ETC. 



81 



the results of the analysis are all calculated to a water content of 

 80 per cent. 



POUNDS OF NITROGEN, PHOSPHORIC ACID AND POTASH CONTAINED IN 

 iOO POUNDS OF DIFFERENT SEA WEEDS CONTAINING 80 PER CENT 

 WATER AND COLLECTED AT DIFFERENT SEASONS OF THE YEA If. 



Kind of sea weed. 



Ribbon weed, kelp or tangle.. . 



Broad ribbon weed, broad leafed I 

 kelp, Devil's apron ) 



Round stalked rock weed ' 



Flat stalked rock weed ] 



r 



I 



Eel grass, grass wrack •[ 



I 



I 



Winter 



Summer 



Winter 



Summer 



Winter 



Summer 



Winter 



Summer 



January 



Marcb 



Sept. 



.38 



.09 



.57 



.19 



.07 



.16 



.45 



.12 



.78 



.27 



.05 



.13 



.27 



.07 



.57 



.13 



.06 



.55 



.40 



.11 



.48 



.16 



08 



.62 



.34 



.03 



.13 



.56 



.09 



.46 



22 



.08 



.42 



.31 



.65 

 .57 

 .52 

 .41 

 .45 

 .37 

 .37 

 .64- 

 .49 

 .48 



Both species of ribbon weed or kelp arc common on the rocks 

 of our coast at and below low water mark, and the round and 

 flat-stalked rockweeds constitute at least three-fourths of the 

 covering of the rocks and stones between tide marks. As seen 

 from the table the plants gathered in the winter season are richer 

 in fertilizer elements that those gathered in the summer. It 

 would, therefore, seem advisable to collect seaweeds during the 

 winter months and if not convenient to apply them at once to the 

 fields, they could be stored in large heaps until spring. 



On account of the large water content and consequent weight 

 of seaweeds, transportation far inland is not profitable. A part 

 of the water can be removed by spreading out thinly on the shore 

 and allowing exposure to a hot sun for a few davs, but it is a 

 question whether this practice is economical on account of the 

 increased labor involved, and if the material is leached by rains 

 after it has become partially dried a part of the fertilizing ele- 

 ment is lost. 



