130 NEBRASKA STATE HORTICULTURAL SOCIETY. 



profits on his investment, besides enhancing the value of the farm of 

 which it forms a part. With the same careful management green ash 

 would give better returns farther east in the state. Several other plan- 

 tations included in the yield table for this species show a yield in fence 

 posts per year not far behind this one, and for No. 14 the returns are 

 considerably better. 



In view of the showing made by green ash, particularly in the more 

 unfavorable western counties, it is obvious that it should have a promi- 

 nent place in future planting. 



BLACK WALNUT. 



Black walnut requires a rich soil for its best development. It is 

 especially adapted to the river valleys, where the soil is fertile, moist, 

 and well drained. It will succeed fairly well on the upland in the eastern 

 counties, but it should be planted commercially only on the bottomlands. 

 Its growth in diameter is nearly equal to that of catalpa, and under 

 favorable conditions it will reach post size in from ten to twelve years. 

 Young timber, however, because of its large percentage of sapwood, does 

 not make a first-class fence post, and the rotation should in consequence 

 be not less than twenty-five years. 



Walnut makes good fuel, but its timber is too valuable to be used for 

 this purpose. The greatest returns will be realized from this species 

 when it is planted for lumber. The time required for the production 

 $t saw logs, however, is from seventy to eighty years, which is a longer 

 rotation than the average planter could afford to adopt. 



Black walnut cannot be depended upon to form a complete crown 

 cover. It is very intolerant under Nebraska conditions, and shades itself 

 out before it has formed a canopy anything like dense enough to shut 

 out weeds and grass. The species therefore should be planted in mix- 

 ture with some more heavily foliaged tree. For bottom soils a mixture of 

 walnut and hardy catalpa, in the proportion of 1 to 3, according to the 

 following diagram, is suggested: 



(4 feet by 4 feet.) 



W C W C 



C C C C 



W C w c 



c c c c 



W — black walnut; C — hardy catalpa. 



Number of trees required per acre. 



Black walnut 680 



Hardy catalpa 2,040 



Total 2,720 



The walnut should be planted two years in advance of the catalpa, 

 since, if the two are planted at the same time, there is danger that the 



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