150 



THE PEANUT— THE UNPREDICTABLE LEGUME 



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Conrtcsy North Carolina Agricultural EA-pcrimcut Station (81) 



Figure 9. — "Overliming injury" with peanuts, resulting apparently from a deficiency 

 of manganese. The stunted, chlorotic plants in the center of the picture were 

 growing on soil at pH 7.7 while the soil in the surrounding area was at pH 5.9. 

 Such injury has been observed on soils as low as pH 6.4. 



additions of copper to the soil. Applications of 10 pounds per acre of 

 cupric chloride to the soil were found to increase the yield of both nuts and 

 foliage and improved the grade quality of peanuts. 



Collins and Morris (43) report that tests with iron, magnesium, 

 copper, borax, manganese and zinc in 12 exjperiments in North Carolina 

 over a 3-year period show little evidence that these elements were limit- 

 ing factors in the production of peanuts. 



Piland, Ireland and Reisenauer (88) studied the effect of additions 

 of 5 pounds of borax on the quality of peanuts at 17 different locations in 

 North Carolina. The average of the results showed that boron had a 

 slight tendency to reduce the shelling percentage. However, the per- 

 centage of large nuts was increased significantly by the addition of borax. 



Sommer and associates (101, 102) in greenhouse studies with several 



