22 



as above referred to. Further, a summary of the yield 

 of nitrogen has been given and discussed in No. 77, and 

 more details, both as to produce and yield of nitrogen, 

 are given in No. 81. 



After the failure of the clover, the land was devoted, 

 in 1878, to the growth of fourteen different plants of the 

 same, that is the Leguminous family, in order to ascertain 

 whether, among those having different habits of growth, 

 and especially different character and range of roots, 

 some could be grown successfully for a longer time, 

 and would yield more produce, containing more nitrogen, 

 as well as other constituents, according to their 

 characters in these respects. 



A description, and a brief reference to the results, of 

 these experiments, will be found in the "Memoranda;" 

 and the results, so far as their yield of nitrogen is 

 concerned, have been discussed in the paper in the 

 " Philosophical Transactions" numbered 77 in the list ; 

 and further results are given in No. 81. 



The general result is, that very much more nitrogen 

 has been yielded on this clover-exhausted land, in some 

 of the other Leguminous plants, than in red clover 

 itself. Thus, whilst red clover yielded over 5 years 

 of the 8, 1878-85, when there was any crop, an aver- 

 age of only 22 Ibs. of nitrogen per acre per annum, and 

 over the 8 years only 14 Ibs., even the weakly growing 

 white clover, which, however, had not been grown on 

 the land for very many years, gave over 6 years of 

 growth an average of 47 Ibs., and over 10 years of 

 28 Ibs. ; Vicia sativa gave, over 3 years 120 Ibs., and 

 over 11 years 77 Ibs. ; Melilotus leucantha gave, in one 

 year 130 Ibs., in another 145 Ibs., and over 11 years 

 62 Ibs. ; and lastly, the deep and powerfully rooting 

 Medicago sativa gave, in 1 year 337 Ibs., in another 

 270 Ibs., in another 247 Ibs., and over 9 years an 

 average of 166 Ibs. of nitrogen per acre per annum. 



It has been decided to consolidate these experiments ; 

 in some cases excluding, and in some transferring to 

 another plot, plants which have already more or less 

 failed ; and, in most if not all cases, allotting two lands 



