Feb., 1927] PROGRESS OF AGRICULTURAL EXPERIMENTS 39 



On the alfalfa plots a basic treatment of two tons of ground lime- 

 stone and twenty loads of manure was used, and the plots were then 

 further treated varyingly with 2 tons of ground limestone, 20 loads of 

 manure, 100 lbs. nitrate, 500 lbs. of acid jihosphate, and 150 lbs. mur- 

 iate of potash in all their combinations. All i)lots are in triplicate, 

 and one out of every four is a check plot. The alfalfa was seeded 

 .June 23, 1926, without a nurse crop, and a good stand was secured. 



A basic treatment of 2 tons of ground limestone was used in the 

 sweet clover jilots, and the idiots were then varyingly treated with 2 

 tons limestone, 20 loads manure, 500 pounds acid i)hosphate and 150 

 pounds muriate of potash alone and in combination. The sweet clover 

 was seeded .Time 3, and a good stand secured. 



3. Effect of Green Manure and Fertilizer on Worn-Out Hay Land 



This project, started in 1920 at Durham, involves the reseeding of 

 old hay lands after plowing under green manures and the application 

 of different fertilizers applied at the time of reseeding. There are 40 

 twentieth-acre plots. 



The results for 1926 do not indicate any consistent residual effect of 

 the fertilizers, which were applied in 1923, whereas the average yields 

 for the four years show considerable increase for those plots on which 

 fertilizers were ajiplied. Variations in the yields of individual plots 

 make it difficult to arrive at any definite conclusions. 



Averaged according to green manuring treatments in 1926, the re- 

 sults indicate higher yields for the plots having had three green crops 

 turned under and also a better yield for the plots receiving one green 

 croj) as against those which were merely plowed and reseeded. It is 

 interesting to note that for the first two years after reseeding the plots 

 which had no green manui'e outyielded those which had one green 

 CYO\), while the last two years the results have been reversed. 



4. Crop Rotation System 



A field has just been leased on the Carter Farm, Boscawen, N. H., 

 upon which a dairy farm rotation system will be installed. The field 

 has been surveyed, and 120 plots have been staked out for experi- 

 mental purposes. 



5. Pasture Improvement through Sweet Clover 



Two areas of pasture land on the College farm, one on a good pas- 

 ture, the other on a very poor ])asture, were laid out and divided into 

 four twentieth-acre plots in the spring of 1925. One of these was 

 plowed, all were limed and treated with 500 pounds acid phosphate 

 per acre. 



The plowed plots were seeded in May, 1926, and one other' plot in 

 each experiment was seeded and disked. One of the remaining plots in 

 each experiment will be seeded in the fall of 1926 with unscarified seed, 

 and the other will be seeded in the late wanter of 1927. 



This experiment is designed to ascertain how pasture lands can be 

 most easily gotten into sweet clover. 



