10 Maine Agricultural Experiment Station. 1918. 



Exact records of yields and measurements of growth have 

 been taken since the experiment was begun. No differences 

 that could be attributed to the additional nitrogen in the fer- 

 tilizer have been observed. It may be that when at the end of 

 a period of years the data are carefully analyzed, results may 

 be found that are not noticeable from general observations. 

 The experiment is being continued. 



Experiment in Bex Davis Orchard No. i. 



In experiments carried out at the New York State Ex- 

 periment Station it was found that with their deep clay soils 

 well suited to apple tree growth and apple bearing, there is no 

 effect from the use of fertilizers either upon the growth of 

 young trees, the wood growth on matured trees, or in the 

 amount, coloring, or size of the fruit. To see if anything like 

 this would hold with Maine conditions, particularly with the 

 rather shallow soil and with the stubborn subsoil upon High- 

 moor Farm, an experiment was begun in 191 2. It is to be 

 remembered that the orchard had been cultivated and fertilized 

 for the 3 preceding years and brought into good condition. 

 About 400 trees were divided into 3 plots containing 12 rows 

 extending clear across the large No. 1, Ben Davis orchard. 

 Plot A (rows 1 to 4) has received no fertilizer since 1912. 

 Plot B (rows 5 to 8) has received annually since 19 12, 500 

 pounds per acre of a fertilizer carrying 4 per cent of nitrogen, 

 8 per cent of available phosphoric acid and 7 per cent of potash. 

 Plot C (rows 9 to 12) has received annually since 191 2, 1,000 

 pounds per acre of a commercial fertilizer carrying 4 per cent 

 of nitrogen, 8 per cent of available phosphoric and 7 per 

 cent of potash. The trees are spaced 25 feet by 25 feet and 

 this amount of fertilizer is therefore at the rate of about 7.2 

 pounds in Plot 6 B and 14.2 pounds in Plot 6 C per tree. 



TYPES OF TREES IN FERTILIZER EXPERIMENT AT HIGHMOOR FARM. 



The records of the yields of the trees in the fertilizer 

 experiment show that there are some trees in each of the plots 

 that have never failed to bear heavy crops and others that have 

 never failed to be light yielders. The Station has no informa- 

 tion as to the reason for the differences but in the part of the 



