12 N. H. AGR. EXPERIMENT STATION. [Bulletin 168 



SCHEDULE OF TREATMENT OF PLOTS. 



Crimson clover is used as a cover crop in every case. Seed is sown July 

 10 at the rate of 20 pounds per plot. In seeding plots 2 and 3 the follow- 

 ing mixture is used : 



10 pounds timothy, 



10 pounds red clover, 



5 pounds white Dutch clover. 

 Plot 1.— Sod. 



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

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



Plot 2. — Cultivated the odd year, cover crop sown July 10, seeded the even. 

 No fertilizer is applied. 



Plot 3. — Cultivated the even year, cover crop sown July 10, seeded the odd. 

 No fertilizer is applied. 



Plot 4. — Clean cultivation. 



This plot is plowed every spring and cultivated every two weeks until 

 September 1. No cover crop is sown and no fertilizer is applied. 



Plot 5. — Cultivation and cover crop. 



This is plowed every spring and cultivated every two weeks. A cover 

 crop consisting of 20 pounds of crimson clover is then sown. No fer- 

 tilizer is applied. 



Plot 6. — Cultivation and cover crop vdth the following complete fertilizer 

 per tree: 



2 pounds nitrate of soda, 

 4 pounds sulphate of potash, 

 7 pounds basic slag. 



Plot 7. — Cultivation and cover crop, with the following complete fertilizer 

 per tree: 



2 pounds nitrate of soda, 

 4 pounds sulphate of potash, 

 8% pounds acid phosphate. 



Plot 8. — Excess Phosphorus. Cultivation and cover crop, with the following 

 complete fertilizer per tree: 



2 pounds nitrate of soda, 

 4 pounds sulphate of potash, 

 17 pounds acid phosphate. 



Plot 9. — Excess Nitrogen. Cultivation and cover crop, with the following 

 fertilizer per tree: 



6 pounds nitrate of soda, 



4 pounds sulphate of potash, 

 8% pounds acid phosphate. 



Plot 10. — Excess Potassium. Cultivation and cover crop, with the following 

 fertilizer per tree : 



2 pounds nitrate of soda, 

 10 pounds sulphate of potash, 

 8% pounds acid phosphate. 



Plot 11. — Limed. A portion of plots 7, 8, 9 and 10 receive 20 pounds 

 slaked lime per tree in addition to the fertilizer treatments. 



Plot 12. — This plot crosses plots 7, 8, 9 and 10 and serves as a check on 

 Plot 11. 



