. Bulletin (Pennsylvania Abteilung der Wälder und Gewässer), No. 46-50. Die Wälder und die Forstwirtschaft. Saatgut lUdx Muh' hcd irith titraw für Winter Schutz t^erccHs Struir sind gelegt, die sich auf IE ≪p in sehr frühen Stunde. An der Jahreszeit, in der mit Fallen - gesät Nadelholz Samen keimen, white-throated Spatzen gegen Mitternacht migrieren. Sie sind wahrscheinlich in Herden sehr plötzlich zu erscheinen, und genauso schnell verschwinden. Aber sehr oft verlassen Sie hinter Ihnen viele Betten ruiniert, und immer eine erhebliche Rechnung für Vogelliebhaber. Frühling - Samen gesät germin - ate später und in der Regel weniger von den Vögeln. Ewige

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. Bulletin (Pennsylvania Department of Forests and Waters), no. 46-50. Forests and forestry. Seed lUdx Muh'hcd irith titraw for Winter Protection t^erccHs are Laid on the Struir to Ie<p It in Place very early hour. At the season of the year when fall-sown coniferous seeds germinate, white-throated sparrows are migrating northward. They are likely to appear in flocks very suddenly, and disappear just as quickly. But very often they leave behind them many ruined beds, and always a considerable bill for watchers. Spring-sown seeds germin- ate later and usually suffer less from birds. Eternal vigilance is neces- sary if the plantings are to be protected from the feathered raiders. YOUNG TREES ARE SHADED The sudden removal of the mulch from the seed beds exposes the germniating seed to the direct heat of the sun, and tends to drv oul the surface layer of soil in which the seed is bedded. It is necJssarv to supply some protection to both seed and soil. Protection is providell by the use of shades, also called screens, which allow only 50 per cent of sunlight to reach the beds. Stakes are driven along the edges of the beds at regular intervals, and wooden strips are laid across the beds, each strip resting on the tops of opposite stakes. These strips are nailed fast to the stakes, and the shades are laid on the strips. 18 The shades are of a length convenient for handling. The first ones used at Mont Alto were made of a patent fence material composed of heavy laths fastened in woven wire. These were both heavy and ex- liensive. Later, shades were made according to the following specifica- lions: two strips of one by two-inch lumber were used for a frame, and 1() these strips ordinary building laths were nailed. The laths were sj)aced one lath-width apart, so that if complete shading was desired, loose laths could be laid between the permanent laths in the screen. A shade of this sort gives alternate strips of sunlight and shadow on tlie beds. As the sun moves, the stri

Stockbilder mithilfe von Tags suchen

• bookcentury1900
• bookdecade1920
• booksubjectforests
• bookyear1923