Jackson B. Hester 305 



yield is above 5 to 6 tons per acre. It must be remembered that certain 

 of these soils are sufficiently well supplied with boron to produce many 

 more tons to the acre, and boron deficiency might even occur at lower 

 yields on other soils. 



Therefore, it becomes obvious that as the soil is limed to the proper 

 pH values and as increased amounts of fertilizer are added and in- 

 creased yields obtained, the deficiency of such elements as boron and 

 manganese become increasingly important. Available manganese has 

 been linked with the red color, sugar, and vitamin content of tomatoes. 

 Here again the balance seems very important. For example, in this 

 connection, 1000 pounds of a 3-12-12 fertilizer mixture seemed in balance 

 on a heavy Brookston silty clay loam, whereas 2000 pounds produced 

 an exceptionally nitrogen-deficient plant. In other words, the phos- 

 phorus and potassium had produced a sufficiently larger growth to 

 make nitrogen a deficient element in this formula. This same thing 

 has been clearly demonstrated in an experiment in New Jersey, using 

 fertilizers with higher nitrogen content. 



From the analyses it may be seen that the fruit from soils of high 

 fertility is superior in almost every way. Such factors as brilliant luster, 

 fine texture, and excellent taste are to be found in fruit produced on 

 fertile soils. 



The trade demands good products and will switch to other products; 

 so it is all important to produce a product of such quality to maintain 

 the market. 



SCOTCH PEAS 



The Scotch pea is a small, deep green, dried pea used in making green 

 pea soup. It has a very desirable color and flavor. It is grown in sections 

 of the country that have a very short growing season and long days. 

 Roseau County, Minnesota, adjoining the Canadian border and the 

 Lake of the Woods, produces several thousand acres of these peas. The 

 soils in this section vary from sands to clays. One characteristic of the 

 soils is high pH values which vary between 7.0 and 8.5. The calcium 

 content is very high; in fact, the mean replaceable calcium, magnesium, 

 and potassium content of 60 samples is as follows: 254, 60, and 2.79 

 milliequivalents per 1000 grams of soil. 



