Organic water retention

K. Grob and Z. Li, Intr oduction of water and water-containing solvent mixtures in capillary gas cliromatography. II. Wettability of precolumns by mixtures of organic solvents and water retention gas techniques , ]. Chromatogr. 473 391-400 (1989). 

A soilless potting mix is best as it reduces the weight of the basket. Improve water retention by adding an organic moisture-retainer, based on coarse seaweed meal. Worm compost (see pp.46-49) added to the mix (up to 25% volume) increases the level of plant foods and improves the water-holding capacity. 

Conifer clippings, 6-8 in (15-20 cm) long, can be used to line a basket (top). "Mock" moss bottom) is also a good choice for the organic gardener to increase water retention in an opensided basket, add an inner liner of an old plastic bag or, as here, a piece of a discarded growing bag. 

There is little doubt that organic gardening improves soils because of the emphasis on increasing soil organic matter. Increased soil organic matter improves soil tilth and stracture, improves water retention, evens out nutrient release and may reduce erosion and nm off. It should be pointed out, however, that the heavy applications of manure sometimes used by organic gardeners can create their own ran-off problems. 

A common reason for diuretic use is for reduction of peripheral or pulmonary edema that has accumulated as a result of cardiac, renal, or vascular diseases that reduce blood delivery to the kidney. This reduction is sensed as insufficient effective arterial blood volume and leads to salt and water retention and edema formation. Judicious use of diuretics can mobilize this interstitial edema without significant reductions in plasma volume. However, excessive diuretic therapy may lead to further compromise of the effective arterial blood volume with reduction in perfusion of vital organs. Therefore, the use of diuretics to mobilize edema requires careful monitoring of the patient s hemodynamic status and an understanding of the pathophysiology of the underlying illness. 

In regions where rainfall is lower and/or less reliable, such as in Western Australia, simpler rotations with longer pasture or fallow phases are more likely. If the soil is heavier, with better nutrient and water retention, a suitable organic crop rotation would be pasture (vetch or medic Medicago spp. hay) > pasture > wheat > chickpeas > fallow > wheat. However, on lighter sandier soils, the rotation would consist of pasture > pasture (green manure) > wheat > oats or simply pasture > pasture > wheat (McCoy and Parlevliet 2001). 

Porapak-T 200 Ethylene glycol-dimethacrylate 0.44 250-300 0.009 — 675 700 635 Water in formalin (and other aqueous organic mixtures) retention characteristics similar to Chromosorb 107 Condition at 180°C highest polarity of Porapak series not recommended for glycols and amines... 

Hatcher P. G., Spiker E. C., and Orem W. H. (1986) Organic geochemical studies of the humification process in low-moor peat. In Peat and Water, Aspects of Water Retention and Dewatering in Peat (ed. C. H. Euchsman). Elsevier, London, pp. 195-213. 

Experience with acute toxicity is limited. A minimum toxic dose is not defined. Headache, dizziness, hypotension, tachycardia, sodium and water retention, and cardiac dysrhythmias may be seen following overdose. Severe hypotension may result in myocardial ischemia other end-organs may also be affected. 

Top layer considerations, including temperature and color, water retention (size, consist, and organics), mulching, and tacking... 

The balance shows that the majority of dissolved elements is retained in the soil, probably because their biochemical precipitation or their consumption by roots or micro-organisms. This retention concerns primarily the nutrients (C, N, PO4) the absorption exceeds generally 50% of the theoretical concentration of the soil water [(theoretical concentration) = (throughfall concentration) x c, see Table IV, column (7)]. The major anions and cations are almost always retained, but in a smaller proportion. The sesquioxides show an irregular behaviour they seem to be sometimes absorbed, sometimes added. This irregularity is perhaps due to the presence of a part of these elements in colloidal form, the proportions of which may fluctuate in relation to the conditions of sampling and conservation of the waters. 

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