6 N. H. AGR. EXPERIMENT STATION. [Bulletin 153 



Plot 1. Sod. 



To remain permanently in sod. Grass to be mown when inconveniently 

 long and allowed to remain. No fertilizer to be applied. 



Plot 2. Cultivated the odd year, seeded the even year. 



To be plowed every second year commencing in 1909, cultivated every two 

 weeks till July 10; then sown with a cover crop of crimson clover. To be 

 plowed in spring and seeded immediately with a grass and clover mixture 

 consisting of 10 lbs. timothy, 10 lbs. red clover and 5 lbs. of White Dutch 

 clover every second year commencing in 1908. The resulting crop is to be 

 mown if inconveniently long, and allowed to remain on the ground. No 

 fertilizer to be applied. 



Plot 3. Cultivated the even year; seeded the odd year. 



To be plowed in 1908, and cultivated every two weeks till July 10; then 

 sown with a cover crop of crimson clover. To be plowed in spring and seeded 

 immediately with a grass and clover mixture consisting of 10 lbs. timothy, 

 10 lbs. of red clover, and 5 lbs. of white Dutch clover, every second year 

 commencing in 1909. The resulting crop is to be mown if inconveniently 

 long and allowed to remain on the ground. No fertilizer to be applied. 



Plot 4. Clean Culture. 



To be plowed in spring annually and cultivated every two weeks till Sept- 

 ember 1st. No cover crop. No fertilizer to be applied. 



Plot 5. Cultivation and Cover Crop. 



To be plowed in spring annually and cultivated every two weeks till July 

 10; then seeded with a cover crop of crimson clover. No fertilizer to be applied. 



Plot 6. Root Pruning. 



To be plowed very deeply, 7 to 8 inches, as a means of root pruning, plowing 

 to be done annually in spring, and followed by cultivation every two weeks till 

 July 10; then seeded with a cover crop of crimson clover. Fertilized with 

 0.3 lbs. Ditrogen, 0.5 lbs. phosphorus, and 0.75 lbs. potassium, per tree. 



Plot 7. Normal Fertilizer. 



To be plowed in spring, annually, cultivated every two weeks till July 

 10; then sown with a cover crop of crimson clover. Fertilized with 0.3 lbs. 

 nitrogen, 0.5 lbs. phosphorus, and 0.75 lbs. potassium, per tree. 



Plot 8. Excess Phosphorus. 



To be plowed in spring, annually, cultivated every two weeks till July 10; 

 then sown with a cover crop of crimson clover. Fertilized with 0.3 lbs. nitro- 

 gen, 0.1 lbs. phosphorus, and 0.75 lbs. of potassium, per tree. 



Plot 9. Excess Nitrogen. 



To be plowed in spring, annually, cultivated every two weeks till July 10; 

 then sown with a cover crop of crimson clover. Fertilized with 0.6 lbs. 

 nitrogen, 0.5 lbs. phosphorus, and 0.75 lbs. potassium per tree. 



