14 a EXPERIMENT STATION. [Jan. 



Department of Ponioloc/y. 



Project 5. "Comparison of cultivation and sod mulch in a 

 bearing orchard." 



Professor Shaw and Mr. French. 



This project was started in the spring of 1921 on a ten- 

 year-old orchard of Baldwin, Mcintosh, Wealthy and Olden- 

 burg, on the Harlow farm. The area is about three acres and 

 is divided into seven plots, three of which are to be seeded to 

 Kentucky blue grass and to receive 300 pounds of nitrate of 

 soda per acre. The other four plots are to be cultivated with 

 a cover crop and are to receive little or no fertilizer. 



Project G. "Comparison of clover and grass in a sod mulch 

 orchard." 



Professor Shaw and I\Ir. French. 



The trees on the area assigned to this project were planted in 

 1911 and consist of Wagener, Wealthy and Oldenburg. Two 

 of the five plots were seeded to grass in the spring of 1921, 

 and are to receive a complete fertilizer designed to further 

 grass production. On the other three plots the fertilizer ap- 

 plication is confined to phosphorus and potassium, with a 

 mixture of white clover and Kentucky blue grass sown. It 

 is hoped by this differential treatment to foster the growth of 

 clovers, and thus make measurement of the effect of grass and 

 applied nitrogen as against the effect on the apple trees of 

 clover plus such nitrogen as it may accumulate from the air. 

 The first effect, as might have been expected, was more marked 

 on the two plots receiving nitrogen. 



Project 7. "Test of fertilizers in a sod mulch orchard." 



Professor Shaw and Mr. French. 



This orchard was brought under experiment in the spring of 

 1921, and in area is about two and one-fifth acres. The 

 fertilizer treatments include the following: — 



300 pounds nitrate of soda per acre annually. 



300 pounds nitrate of soda 1 „ 



„^^ , . T , , r per acre annuallv. 



300 pounds acid phosphate J 



300 pounds nitrate of soda 1 



300 pounds acid phosphate [ per acre annually. 



200 pounds sulfate of potash ] 



