Alfalfa and Birdsfoot Trefoil Better Than Ladino Clover on Droughty Soil. 



Seedings of four perennial legumes with timothy were made in the dry 

 year of 1950 on a droughty Stratham gravelly loam in southern New Hamp- 

 shire. In 1951 the plots were harvested as two cuttings of hay, and the per- 

 sistence of the legumes was determined from a botanical analysis of the crops. 



The results indicated that alfalfa and birdsfoot trefoil survived best and 

 the perennial red clover and ladino poorest. 



The yields of legume in the second cutting of 1951 expressed as pounds 

 of dry matter per acre were as follows: alfalfa, 2104; trefoil, 1093; red 

 clover. 290; and ladino, 47. 



On another soil type — the Paxton loam, with good moisture-holding 

 properties so that drought was not as vital a factor — the order of survival 

 was quite different. Ladino clover persisted best, with alfalfa and red clover 

 next and about equally good, and trefoil poorest. 



The results particularly emphasize the importance of considering the 

 physical properties of the soil when selecting a perennial legume for maxi- 

 mum persistence in a grassland program. 



L. T. Kardos, P. T. Blood 



Soil Survey. 



During the past season there was additional soil surveying in Rocking- 

 ham County, but about 40 square miles in the vicinity of Northwood and 

 Deerfield still remain to be done. Lack of experienced personnel has slowed 

 up the work in Rockingham County, but it is hoped the work there will be 

 completed soon. Following completion of the field survey, a report will be 

 written and published with an accompanying map. 



The soil survey report and map for Hillsboro County is in press. 



When the soils of Strafford County were mapped, the land use was also 

 obtained. The latter information was not published with the soil map but 

 has been worked up during the past winter. The soil and land-use relation- 

 ships have been summarized in tabular form, and may be available in an 

 Experiment Station publication. 



W. H. Lyford 



2,4-D Will Control Weeds in Corn That Is 12-18 Inches High. 



The best time to control weeds in corn is before the corn gets more than 

 6 to 8 inches high, but it was found that fair control was obtained when the 

 corn and weeds were 12 to 18 inches high. Ten gallons per acre of a solu- 

 tion containing half a pound of 2.4-D (acid equivalent) applied at this stage 

 of growth did not injure the corn, but killed or stunted the weeds to the 

 extent that they did not produce viable seed. 



P. T. Blood, F. S. Prince 



OTHER ACTIVE PROJECTS 



The Influence of the Level of Available Potash in the Soil on the Longevity 

 or Persistence of Ladino Clover in Hay Stands. 



F. S. Prince, L. T. Kardos, 

 P. T. Blood, A. E. Teeri 



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