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The William Farquhar Collection of Natural History Drawings consists of 477 watercolour botanical drawings of plants and animals of Malacca and Singapore by unknown Chinese (probably Cantonese) artists that were commissioned between 1819 and 1823 by William Farquhar (26 February 1774 – 13 May 1839). The paintings were meant to be of ...
The drawings are by Albrecht Meyer and the engravings by Veit Rudolph Speckle. Fuchs included ornamental plants and plants brought back from the Americas, and had the whole plants, including roots, flowers and fruits, illustrated from life so that they could be identified. His work was reprinted many times and in several languages.
Irrigation (also referred to as watering of plants) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been developed by many cultures around the world.
Top-fed deep water culture is a technique involving delivering highly oxygenated nutrient solution direct to the root zone of plants. While deep water culture involves the plant roots hanging down into a reservoir of nutrient solution, in top-fed deep water culture the solution is pumped from the reservoir up to the roots (top feeding).
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Salinization - Depending on water quality irrigation water may add significant volumes of salt to the soil profile. While this is a lesser issue for surface irrigation compared to other irrigation methods (due to the comparatively high leaching fraction ), lack of subsurface drainage may restrict the leaching of salts from the soil.
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Also, plants with deep reaching roots can transpire water more constantly, because those roots can pull more water into the plant and leaves. Another example is that conifer forests tend to have higher rates of evapotranspiration than deciduous broadleaf forests, particularly in the dormant winter and early spring seasons, because they are ...