24 University of New Hampshire [Sta. Bui. 330 



A Dairy Farm Rotation Experiment in Southern New Hampshire 

 with Sweet Corn as a Cash Crop (F. S. Prince and P. T. Blood) 



During 1939 the dairy farm rotation experiment conducted at 

 Chichester was revised to include sweet corn in the rotation instead 

 of potatoes. The field is the same as that on which a three-year ro- 

 tation of potatoes, oats, and clover had been grown during the previ- 

 ous six years. Sweet corn was continued again in 1940 with various 

 fertilizer treatments. 



Because the 1939 season was so dry that yields of corn were cut 

 severely, the data obtained that year were not considered of great 

 value. Results of the 1940 crop indicate that a planter application 

 of 4-16-4 fertilizer, in addition to some manure and super-phosphate 

 spread broadcast, will prove the most satisfactory treatment for sweet 

 corn on farms where manure is available. If manure is not available, 

 a high phosphorus content fertilizer, such as 4-16-4, in amounts up 

 to at least 1000 pounds per acre seems justified on the better soils. 

 This may be supplemented with nitrate of potash at the last culti- 

 vation. 



(Purnell Fund) 



A Survey of the Soils of New Hampshire (F. S. Prince, W. H. Coates, 

 R. Feuer, G. P. Percival, and P. N. Scripture) 



The survey of soils begun in 1937 in cooperation with the Soil 

 Conservation Service and the Division of Soils has continued. Dur- 

 ing 1940 work was finished in Hillsborough and Stratford counties. 



Beginning with Strafford county, the plan of the work was 

 changed. In this county soils, slope erosion, and land cover were 

 mapped, giving a more comprehensive picture than for other coun- 

 ties. This procedure, however, necessitated plane-table work in each 

 field, and the time involved for a county has been increased consid- 

 rably. 



(Purnell Fund) 



Devising Methods for Controlling Erosion on New Hampshire Potato 

 Fields (W. H. Lyford) 



This project carries on the work formerly reported under the 

 title "The determination of run-off and erosion from representative 

 groups of New Hampshire upland soils." The study is being made in 

 conjunction with the Soil Conservation service. 



In accordance with the plan of the experiment, seven run-off 

 plots, all of which had been in heavy sod, were established in the 

 spring of 1940 at Northwood Ridge, New Hampshire. Potatoes were 

 grown on the contour on six of the plots, and the seventh was left in 

 grass. During the season, soil and water losses, together with cer- 

 tain climatic data, were recorded at frequent intervals. 



The data collected indicate that erosion previous to freezing 

 was practically negligible. Evidently, the run-off erosion was con- 

 trolled by contouring and by the use of a soil which had been in sod 

 the previous season. Soil on which sod has been recently broken up 



