18 N. H. Agr. Experiment Station [Bulletin 304 



Transplanting Ornamental Trees 



A study of the optimum time for transplanting ornamental shade 

 trees was begun by H. S. Clapp in the autumn of 1936. Five to seven 

 foot selected sugar maple trees {Acer saccharum Marsh), similar trees 

 from woodland areas and 5' to 7' nursery trees of the white ash [Frax- 

 imis americana L.) were used. They were planted in a sod area in 

 order to approximate as closely as possible the conditions in lawns and 

 meadows where such trees are usually planted. It was divided into six 

 plots, each containing three rows of 5 plants each. One tree of each of 

 the species as received from the nursery and one from the woodland was 

 planted in each plot, on each of five planting dates. 



The data reported are not sufficiently conclusive to warrant specific 

 recommendations for nursery stock. However, they do indicate that 

 late fall and late spring planting is impractical for native woodland 

 stock in this region. {Hatch Fund) 



Greenhouse Soil Fertility Studies 



The study of the natural fertility of various soil types found in the 

 state was continued in the greenhouse by P. N. Scripture and P. T. Blood 

 during the winter of 1937. The soils which were used were representa- 

 tive of the following types : Agawam fine sandy loam, Groveton fine 

 sandy loam, Worthington loam, Becket loam, Merrimack loamy fine sand 

 and Colton loamy fine sand. 



The samples were taken from "virgin" areas, i. e., areas that have 

 never been cultivated or received fertilizer in any form. Large areas 

 of these soils are under cultivation in different parts of the state and 

 with the possible exception of the Colton and Merrimack are well adapted 

 to all crops. In years with a plentiful supply of rainfall the Colton and 

 Merrimack soils will also produce good yields with adequate fertilization. 



The yield data showed that all the soils responded somewhat to nitro- 

 gen, provided there was a plentiful supply of phosphorus and potassium 

 present. All soils showed a large growth response to phosphorus ap- 

 plications. During the latter part of the growth period, applications 

 of potassium produced an increase in growth on all the soils. The 

 "Worthington and Becket soils showed a marked increase in growth 

 from applications of magnesium and boron. 



The response of the other soils to these elements was not noticeable. 

 The Becket soil showed a definite increase in growth where lime was 

 applied, but the Groveton soil failed to produce a definite increase when 

 limed. 



It will be necessary to do more work with magnesium and boron be- 

 fore definite conclusions can be drawn in regard to their value as added 

 plant nutrients to New Hampshire soils. All New Hampshire soils 

 seem to be naturally low in available phosphorus. The potassium con- 

 tent varies somewhat with the soil type but in general some increase in 

 crop growth will be obtained from additions of potassium on practically 

 all the soils. {Purnell Fund) 



