. Bulletin (Pennsylvania Department of Forests and Waters), no. 46-50. Forests and forestry. (icHcral ]'i('iv of hJaxtcni Section of Mont Alto Xurscrif in 1022 Before Over- h<ii(l Irrif/otion Sifstem iras hisfalled. Semi-Portahle Water Line Siipimrted on ahout Three Feet Ilif/h Shoirn in Center. (hnerul View of Eastern Section of Mont Alio NnrHery After Overhead I rr if/at ion ;'in icuh Installed if it is possible to do it. The roots of all trees are unfavorably affected I)y the drying out of the soil in which they grow. Older trees, with roots that penetrate deep int
. Bulletin (Pennsylvania Department of Forests and Waters), no. 46-50. Forests and forestry. (icHcral ]'i('iv of hJaxtcni Section of Mont Alto Xurscrif in 1022 Before Over- h<ii(l Irrif/otion Sifstem iras hisfalled. Semi-Portahle Water Line Siipimrted on ahout Three Feet Ilif/h Shoirn in Center. (hnerul View of Eastern Section of Mont Alio NnrHery After Overhead I rr if/at ion ;'in icuh Installed if it is possible to do it. The roots of all trees are unfavorably affected I)y the drying out of the soil in which they grow. Older trees, with roots that penetrate deep into the ground, are perhaps little affected !)y the drying of the surface layer of soil; but the roots of tiny seed- lings lie entirely in this surface layer. Until these little trees develop sufficient foliage to shade the soil in which they stand, and produce (It'ep penetrating roots, it is advisable to keep the beds shaded. YOUNG TREES REQUIRE PLENTY OF MOISTURE During the critical period of growth, before the tiny roots have penetrated into the moist layers of soil, little trees must have i)lenty of moisture. An overhead sprinkling system is now installed throughout the entire producing area at the ]\Iont Alto Nursery. Trees of all Hges are watered freely throughout the growing season. The water for this sprinkling system is supplied by a reservoir, which is connected by a gravity line with the "Tarburner ; This reservoir, built in 1909, and located on a hillside above the nurs- ery, gives an am])le su])ply of water at all times. It is connected with the nursery by a four-inch pijie line, so that there is ample pressure at rill times. Before this system was installed, water for sprinkling l)nrposes was obtained through a semi-])ortable pipe-line system. The reservoir serves as a warming basin, where the cold spring water loses its extreme chilliness; for water that is too cold when applied to the germinating beds not only retards germination, but also hinders
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