Water was applied four times dur- 

 ing the period from July 17 to Aug- 

 ust 15, or approximately at weekly 

 intervals. Since the sprinklers used 

 do not distribute the water exactly 

 evenly over the area, the cages were 

 so set as to cover the dry as well as 

 the wet segments of the areas to be 

 irrigated. Approximately one inch of 

 water was applied at each watering. 

 There was a gain of 1.573 pounds of 

 oven dry weight for the fertilized, 

 irrigated areas and 2,140 pounds for 

 the unfertilized, irrigated sections. 



A response for fertilizer was ob- 

 tained on the non-irrigated areas, 

 but not on the irrigated sections, 

 perhaps because the land had been 

 top dressed in May before irrigation 

 started and had, in fact, been top 

 dressed annually. 



Drought in the Durham area was 

 slightly more severe in 1950 than in 

 1949. Rainfall from June 5 to Aug- 

 ust 19 totalled only 3.98 inches. The 

 experimental area consisted of a new 

 seeding of clovers and grass that had 

 been made in March on land plowed 

 directly from sod and prepared in 

 the autumn of 1949. The first irri- 

 gation water was applied June 17 

 and watering continued until mid- 

 August or until seven inches of water 

 were applied at as many applications. 



The areas under irrigation were 

 pastured twice, but not enough of a 

 stand developed in the non-irrigated 

 portions of the field to provide pas- 

 ture of much value. 



The increase for irrigation of 

 2,992 pounds of oven dry forage 

 would probably approximate 15,000 

 pounds green grass, a volume suffici- 

 ent to furnish 100 days of pasturing 

 for one cow at 150 pounds of green 

 grass per acre daily. Since pasturing 

 did not start until mid-July, this 

 appears to be a very satisfactory 

 yield. 



More important is the fact that a 

 very much better stand of grass and 

 clovers was obtained on the irri- 



gated portions of the field. Lack of 

 irrigation might result in a complete 

 loss of stand in extremely dry sea- 

 sons. 



A similarity is noted here between 

 the increases for irrigation for the 

 two years since in both seasons an 

 inch of irrigation water caused an 

 average increase of a little over 400 

 pounds. This would amount to ap- 

 proximately one ton of green grass. 



F. S. Prince 

 P. T. Blood 

 J^. T. Kardos 



Boron is Essential For 



Best Yields of Ladino Clover 



Greenhouse experiments with dif- 

 ferent amounts of borax and lime 

 indicated that best yields of ladino 

 clover were obtained when the soil 

 was treated with one ton of lime 

 and borax at a rate of 10 pounds per 

 acre. When the same soil was treated 

 with one ton of lime and borax 

 added, the yield was about 23 per 

 cent less. When the equivalent of 40 

 pounds of borax per acre was used, 

 the yield was slightly depressed but 

 still remained 10 per cent greater 

 than where no boron was used. From 

 these results, it appears that borax 

 applications commonly recommended 

 for alfalfa seedings would not be 

 seriously deterimental to ladino 

 clover which might be planted with 

 the alfalfa. 



L. T. Kardos 



F. S. Prince 



P. T. Blood 



Continued Use of Fertilizers 

 Containing Borax Is 

 Detrimental to Yield of Potatoes 



As a result of experiments carried 

 out on Worthington loam soil in the 

 Colebrook area, it has been found 

 that when as little as five pounds of 

 borax per acre were added with the 

 fertilizer in the land, and when such 

 application was made in each of five 



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