Hur kan man annars få tillgång till fosfor o kalium utan att använda kemikalier
Ofta rekommenderas att man använder aska från lövträd för att minska risken för tungmetaller.
HistoryEgyptians, Romans, Babylonians, and early Germans all are recorded as using minerals and/or manure to enhance the productivity of their farms. The use of wood ash as a field treatment became widespread.[4]
One of the major obstacles to land application of woodash is the undesirable handling and spreading characteristicsof ash. Most ash has a low density and small particle size.This can create dust problems during transport and application.Always cover wood ash during transport to preventlosses enroute to the application site. Studies indicate thatthe handling characteristics of ash generally improve withincreasing relative humidity so avoid spreading on extremelydry days. Moisture can be added to improve the handlingcharacteristics of ash; however, if too much moistureis added the ash will cake and become difficult to spreaduniformly. Ash can be spread with a conventional manurespreader or with lime application equipment. It can be topdressed or incorporated. To get the full benefit, incorporatethe wood ash throughout the root zone whenever possiblebecause the benefits only occur where the ash and soil arein contact. Calibrate the spreader to ensure that the targetapplication rate is met. Due to the physical characteristicsof ash, it is often difficult to obtain uniform application, butcalibration of the spreader and knowledge of the spread patterncan minimize non-uniformity The fall is generally the best time for wood ash application.
intressant nog så varnar de inte för nån aska på engelskråkiga wiki-sidan ; https://en.wikipedia.org/wiki/Wood_ashdenna kan väl vara relevant med; https://en.wikipedia.org/wiki/History_of_fertilizerbonus, en PDF: http://www.fao.org/3/a-y5863e.pdfedit, kör en till https://secure.caes.uga.edu/extension/publications/files/pdf/B%201142_3.PDF
Environmental hazardsHard coal and lignite almost always contain traces of the radioactive elements uranium , thorium and radium . Depending on the deposit, the content is usually between a few ppm and 80 ppm, European hard coal or lignite contains around 80–135 ppm uranium. [4] about 7800 million tons of coal per year in Da world's coal-fired plants are burned, it is estimated the total output of 10,000 tons of uranium and 25,000 tonnes of thorium contained largely in the ashes.Between 1960 and 1970, approximately 1,100 tons of uranium were extracted from coal ash in the United States. In 2007, the Chinese National Nuclear Corp commissioned the Canadian company Sparton Resources in cooperation with Beijing No. 5 Testing Institute to conduct attempts to extract uranium from the ashes of the Xiaolongtang coal-fired power plant in Yunnan Province . The uranium content of the ashes from this power plant is, on average, 210 ppm uranium (0.021% U) above the uranium content of some uranium ores. [5]
Ecological importance of plant ashPlant ash from biomass firing is a valuable secondary raw material for agriculture and forestry. Due to their nutrient content, the soil-improving effects and the ecological principle of closed production cycles, plant ash can and should be returned to the natural cycles to protect the soil and the environment. The return of nutrients has become all the more important in recent years, on the one hand because there is an increasing amount of ash and on the other hand the natural resources for fertilizer production are becoming increasingly scarce.
Current use of plant ashBecause of currently insufficient guidelines, plant ash can currently only be partially used. An addition to the compost is permitted, but the amount that can be used in it is too small to use the plant ash from biomass heating plants and biomass heating plants .In Austria, therefore, a guideline is being written, which in particular gives the possibility of using plant ash in the forest . Grate ashes from biomass incineration plants would be particularly well suited for the construction of forest roads , but are not used due to a lack of guidelines and a lack of information from forest owners.
Läs hellre texten direkt på tyska än googleöversatt, den brukar bli mer begriplig då.
ja, det var ett bra tips säkert men jag är van vid att tänka på att det slinker in allvarliga fel i översättningar. råkar nämnligen varnas för i den heliga bibeln!
Är inte det här ett svenskt forum för självhushållning, vilket innebär att inlägg och referenser i första hand skall vara svenska?Internetreferenser på utrikiska kan omfatta svenska/skandinaviska förhållanden, men om de är på engelska kan de lika gärna vara för Nordamerika som inte nödvändigtvis har samma odlings- eller klimatförutsättningar som här.Och internetkällor från Mellanöstern, t e x Jerusalem Post, är definitivt inte inriktade på odlingsförhållanden i Sverige.Det går att ställa in sökmotorn Google på språk så att svaren i första hand blir på svenska.
