Yearbook of the Academy of Natural Sciences of Philadelphia. Philadelphia - PA


Horticultural Papers

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Yearbook of the Academy of Natural Sciences of Philadelphia. Philadelphia - PA
Published in: 1923-1931 - 1924-1932
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What Else Is Inside bullet1
Seed Raising - There are three essentials for the successful germination of seeds of all types - moisture, warmth and air. In addition, most seeds germinate best in ...

Red Legged Earth Mites - Red-legged earth mites (Halotydeus destructor and Penthaleus major) are active only during the winter months. The eggs hatch after the first autumn ra...

Temperature and Humidity - One reason foliage plants get along so well with people is that they like just about the same temperature levels - 15 to 29 C degrees. Extremes above ...

Permaculture Zones - An innovation of design was the appreciation of the efficiency and productivity of natural ecosystems and to seek to apply this efficiency to the way ...

Grouping House Plants - When choosing flowering plants to put together, try to get a good contrast of shapes without a great mixture of colours. Shade and sun-loving plans ar...

Potted Roses - Rose-bushes, growing in various kinds of containers, are sometimes available during late spring and summer. These plants are useful in filling bare sp...

Miniature Roses - Miniature roses range from 8 to 20 in. high. The tiny individual blooms are often replicas of hybrid teas. The foliage is also proportionately smaller...

Winter Protection for Bonsai - In areas where winters are severe, bonsai need protection not from the cold so much as from high winds that cause the plants to die from parching. Whe...

PLanting Bulbs - Bulbs already contain most of the nourishment the plant will need. Many will grow in fibre containing negligible nutriment, in water or even on pebble...




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