^4 N. H. Agr. Experiment Station [Bulletin 304 



The pH range of these 1,000 samples is as follows : 



Below pH 5.0, a soil should be limed no matter what crop is to be 

 grown. Between pH 5.0 and pH 5.5, soils should be limed for clover 

 and alfalfa, and in the lower ranges for all crops. Between pH 5.5 and 

 pH 6.0, a soil is satisfactory for clovers and other crops except alfalfa 

 and sweet clover. For alfalfa and sweet clover a test of pH 6.0 or above 

 is satisfactory. 



Special rules for liming in potato rotations have been formulated and 

 •distributed to potato growers as follows in order to avoid trouble from 

 potato scab : 



"1. On soil with pH 5.3 or above, use no lime. 



2. On soil with pH 5.0-5.2, use not more than 500 pounds of lime. 



3. On soil below pH 5.0, use not more than 1,000 pounds of lime. 



4. Never use more than 1,000 pounds of lime at one application, 

 no matter how acid the soil. 



5. Lime after the potatoes are grown, when seeding down, and 

 never just before planting the potato crop. 



"The amounts of lime stated are for ground limestone." {Miscel- 

 laneous Income) 



A Study of Pasture Species Under New Hampshire Conditions 



This experiment was started in 1936 with the planting of small plots 

 in duplicate in pure lines and mixtures of species suitable for pasture. 

 Certain pure lines and mixtures were also seeded in duplicate in larger 

 plots for pasture. 



The small plots were observed during 1937 for persistence and growth 

 habits. Samples were obtained from the pure line plots for chemical 

 work. These were taken as near the same stage of maturity in each case 

 as possible. 



The mild winter of 1936-37 was not one to give the various species a 

 •severe test and no winterkilling was observed in any of them. In this 

 test there are now growing 42 alfalfa varieties or strains, 13 Dutch 

 clovers, 16 red and alsike clovers and 10 species of grasses. In addi- 

 tion to the pasture species there are 40 lawn and golf green plots, 

 twenty of each, which include 10 pure lines or mixtures in duplicate in 

 each case. It is hoped in this test to determine the best lawn and golf 

 -species for New Hampshire conditions. 



This experiment is being conducted so that it can be used as a trial 



ground for new species that seem worthy of testing either from local 



:sources or from the Regional Laboratory at State College, Pennsylvania. 



