i6o 



Journal of Agricultural Research 



IVol. in. No. 1 



better, and 6 worse; and 3 the same, 2 better, and 7 worse, showing that 

 during the years in question a slight increase in the disease had taken 

 place, and any effect of the fertilizers applied was scarcely discernible. 

 The plot treated with lime stands out somewhat from the rest, since there 

 was distinctly more increase in the disease here and no tree showed signs 

 of recovery. 



In April, 191 1, a i6-plot fertilizer test was started among nonrosetted 

 8-year-old Georgia Giant and Nelson pecans in an orchard at Baconton, Ga. , 

 at that time the property of Mr. Chas. M. Barnwell. The soil is a sandy 

 loam underlain at i K to 2 feet by red clay. Two rows of each variety 

 were taken through the block, giving 4 trees of each variety to a plot. 

 The same general scheme of fertilizer combinations was used as that em- 

 ployed by Mr. M. B. Waite in his apple-nutrition experiments, and annual 

 applications were made, except in the case of lime, which was used only 

 at the beginning of the experiment. The land was cropped to winter 

 oats, followed by cowpeas, the first two seasons, and the third season 

 velvet beans only were grown in the centers. At the last observation 

 there was but little apparent difference among the fertilized trees in 

 general vigor and length of growth, color of foliage, and quantity of nuts, 

 but the two check plots bore foliage of a conspicuously paler color. The 

 condition of the various plots in August, 1913, is shown in Table I. 



Table I. — Summary of res2ilts from a fertiliser test with pecan trees at Baconton, Ga. 



Plot 

 No. 



9 

 10 

 II 

 12 



13 



14 

 15 

 16 



Fertilizer." 



Lime 



lime and nitrate af soda 



Lime and cotton-seed meal 



Lime and muriate of potash 



Lime and sulphate of potash 



Lime and acid pliosphate 



Lime and Thomas phosphate 



Lime, muriate of potash, and nitrate 

 of soda 



Lime, muriate of potash, and acid phos- 

 phate 



Lime, acid phosphate, and nitrate of 

 soda 



Lime, muriate of potash, nitrate of soda, 

 and acid phosphate 



Muriate of potash, nitrate of soda, and 

 acid phosphate; no lime 



Muriate of potash and acid phosphate; 

 no lime 



Stable manure; no lime 



Stable manure and ground bone; no lime 



Control ; no lime 



Number 



o( trees 



with 



rosette. 



Number 

 of doubt- 

 ful cases. 



Number 



of healthy 



trees. 



Average 

 increase in 

 diameter. 



Inches. 

 1-23 



•99 



■97 

 I. 29 

 I. 27 

 I. 01 



I. 12 



I. 00 



1-33 



.87 



1.48 



I. 08 



•94 



1.05 



1-03 



o Fertilizers were applied at the following rates: Lime (CaO, acted on jointly by air and water), i bushel 

 per tree; nitrate of soda, 8 pounds; cottonseed meal. 32 pounds; muriate and sulphate of potash. 8 pounds; 

 add phosphate, Thomas phosphate, and ground bone. 24 pounds; stable manure, a liberal application. 



