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The responses were studied of 2 quaking aspen (Populus tremuloides) sucker stands and 2 hybrid aspen (P. alba X grandidentata and P. tremuloides X P. tremula) plantings in northern Wisconsin to fertilization (F) and irrigation (I). Growth increases were measured over 7- and 6-yr periods for the...

Einspahr, D. W.; Wyckoff, G.
Tappi, 1978, 61, 3, pp 49-52

Data from a sand-culture experiment in which the amounts of N, P, K, Ca and Mg were varied revealed that seedlings from the P. tremuloides X P. canescens cross grew faster (as reflected in green-weight production) than those from the P. canescens X P. tremuloides, P. tremuloides X P. tremuloides or ...

Einspahr, D. W.
Genet Physiol. Note Inst. Chem., Appleton, Wis., 1968, No. 4, pp 17