12 N. H. Agr. Experiment Station [Bulletin 313 



Trials of ten different varieties were made in 1938 by J. L. Had- 

 dock and P. T. Blood who observed the growth habits and general 

 suitability to New Hampshire conditions. The varieties Chippewa, 

 Mesaba. Smooth Rural and Houma are very promising and should be 

 given further trials. Houma, for example, is an excellent yielder, 

 free of disease, slightly later than Green Mountain in maturing, but 

 not too late. Chippewa matures ten da^^s ahead of Creen Mountain 

 and has yielded 30 to 100 bushels per acre better in this year's tests. 

 It is, however, somewhat inferior to Green Mountain in its cooking 

 quality. 



A Fertilizer Experiment with Dairy Farm Crops in the 

 Connecticut Valley 



A crop of mixed clover and timothy hay was secured from plots on 

 the Livingston farm in Claremont in 1938. Yield data show that for 

 optimum legume crops a balanced fertilizer program is necessary 

 with potash being the most important single factor for success. 



Experiments in Top-dressing Old Pastures 



The test of fertilizers on old pastures has been continued without 

 change on the Seavey farm in Stratham during 1938. The type of 

 response that is being secured appears to point more definitely in 

 favor of the use of complete fertilizers than was the case during the 

 first few years of the test and for this reason we have felt it desirable 

 to continue the work. All the treated plots show increases over the 

 untreated plots. Nitrogen stimulates forage growth much more 

 than the other two elements. Basic slag does slightly better than 

 superphosphate; muriate of potash and superphosphate stimulate 

 the sward to about the same degree. The triennial application of 

 superphosphate is somewhat better than an annual one, although the 

 annual dose of potash is superior to the triennial application. 



On plots similarly treated in the Livingston pasture, data indicates 

 that the three elements are nearly equal in promoting the yields of 

 pasture forage. 



Soil Survey of New Hampshire 



The survey of Hillsboro county, begun in the autumn of 1937, was 

 continued in 1938. At the close of the field season the county was 

 slightly more than half mapped so that the prospects are favorable 

 for completing this area in 1939. 



In accordance with a new agreement signed in June, 1938, the Soil 

 Conservation Service is cooperating in the survey of Strafford 

 county; and in addition to the soils, the degree of slope, land cover 

 and erosion factors are being mapped. To do this it has been neces- 

 sary to plane table the open land, a factor that has slowed up the 

 work materially. Help with the survey from the Conservation Ser- 

 vice (lid not arrive until October 11 and the net result has been that 

 less than 140 of the 379 sciuare milos of Slralford county have been 

 surveyed, whereas the Hillsl)()ro party ma|)ped almost 400 square 

 miles. If the cooperative agreement involving the Soil Conservation 

 Service stands, it will take se\eral years longer to complete the soil 

 survey of New Hampshire than we had originally anticipated. 



The personnel for the soil survey has been as follows: Hillsboro 

 county ~ C. S. Simmons, Division of Soil Survey, United States 



