CE ESTE pH?
WHAT IS pH?
In chimie, pH-ul este masura aciditatii sau bazicitatii a unei solutii apoase. Solutii cu un pH mai mic decat 7 se cheama acidice, iar solutiile cu un pH mai maire de 7 sunt bazice sau alkaline. Apa pura are un pH in jur de 7.
In chemistry, pH is a measure of the acidity or basicity of an aqueous solution. Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline. Pure water has a pH very close to 7.
Scala pH este legata de un set de solutii standarde al carui pH este stabilit de acord international.Valori standarde primare pentru pH sunt determinate folosind o concentratie cu tranferenta celulara, prin masurand diferenta de potential (curentul) intre o electroda de hidrogen si o electroda standarda ca si electroda din clorid de argint. Masurarea pH-ului pentru solutii apoase se poate efectua cu o electroda de sticla si un pH metru, sau folosind indicatori.
The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. Primary pH standard values are determined using a concentration cell with transference, by measuring the potential difference between a hydrogen electrode and a standard electrode such as the silver chloride electrode. Measurement of pH for aqueous solutions can be done with a glass electrode and a pH meter, or using indicators.
Conceptul pH-ului a fost introdus pentru prima data de chimistul danez Søren Peder Lauritz Sørensen la Carlsberg Laboratory in 1909. Semnificatia "p"-ului din "pH" conform fundatiei Carlsberg, pH inseamna "puterea hidrogenului". Scala pH este logaritmica, de aceea este o cantitate fara dimensiune.
The concept of p[H] was first introduced by Danish chemist Søren Peder Lauritz Sørensen at the Carlsberg Laboratory in 1909. The exact meaning of the "p" in "pH" is disputed, but according to the Carlsberg Foundation pH stands for "power of hydrogen". The pH scale is logarithmic and therefore pH is a dimensionless quantity.
CE ESTE pH-ul SOLULUI?
WHAT IS THE SOIL pH?
pH-ul solului este masura aciditatii sau alcalinitatii solului. O scala numerica simpla este folosita pentru a expresa pH. Scala merge de la 0.0 la 14.0, cu 0.0 fiind cel mai acidic, iar 14.0 fiind cel mal alcalin. Valoarea 7.0 este neutral - deci nu e nici acidic nici alkalin.
Soil pH is the measure of the acidity (sourness) or alkalinity (sweetness) of a soil. A simple numerical scale is used to express pH. The scale goes from 0.0 To 14.0, with 0.0 being most acid, and 14.0 being most alkaline. The value, 7.0 is neutral--i.e., neither acid or alkaline.
Nivelul pH determina disponibilitatea nutrientilor pentru planta voastra, precum si rata de absorbare a acestor nutrienti. In alte cuvinte daca luati timpul si asigurati gama pH corecta veti avea plante mai fericite si o recolta mai robusta cu fructe mai gustoase.
Your soil’s pH level determines nutrient availability for your plants as well as the absorption rates of those nutrients. In other words, taking the time to make sure your soil is in the correct pH range means happier plants and a hardier, more bountiful, and tastier harvest.
Goji creste cel mai bine in gama pH de 6.5-8.1
Goji grows best on a pH range of 6.5-8.1
ATENTIUNE! - ATTENTION!
Scala pH fiind logaritmica, diferenta de 1 unitate de pH este echivalenta cu o diferenta de 10x in concentrarea ionilor de hydrogen. Aceasta inseamna ca un pH de 7.0 este de 10x mai acidic decat un pH de 8.0, iar un pH de 6.0 este de 100x mai acidic decat 8.0, un pH de 5.0 este de 1000x mai aicidic si asa in continuare..
Noi recomandam sa experimentati cu cateva plante, depinzand de conditiile de cultivare
Since pH is a logarithmic scale, a difference of one pH unit is equivalent to a tenfold difference in hydrogen ion concentration. That means that a pH of 7.0 is 10x more acidic than a pH of 8.0, a pH of 6.0 is 100x more acidic, pH of 5.0 is a 1000x more acidic and so on..
We recommend feeling out and testing your plant, what it's preferences are depending on your environmental and setup scenario, as you can see there is a pretty wide range to play with here, but if you go out of the recommended range, you might soon find yourself running into problems.
CE SCHIMBA pH-ul SOLULUI?
WHAT CHANGES A SOIL'S pH?
Solul e alcatuit din roca parentala, iar acesta roca parentala joaca un rol important in determinarea pH-ului care va resulta. Daca roca parentala a fost alcatuita din materiale bogate in carbonat de calciu, ca si piatra de var, solul va fi alcalin. Soluri alcatuite din materiale bogate in dioxid de siliciu tind sa fie mai acidic. Ploia ajuta la extragerea materialelor bazice (alcaline) ca si calciu din sol. Apa de ploaie in sine, tinde sa fie un pic pe partea acidica, ceea ce este un alt factor contribuitor la soluri acidice. Daca traiti intr-o zona secetoasa, e probabil sa aveti un sol cu un pH pe partea alcalina, deorece ploaia nu poate sa extraga materialele bazice. Toaste astea impreuna explica un pic diferentele regionale dintre recolte in parti diferente ale tarii.
Soil is made up of crushed up parent rock, and the composition of this parent rock plays a role in determining the resultant soil’s pH. If the parent rock was a calcium carbonate-rich material, like limestone, the soil will likely be alkaline. Soils made up of silica-rich material tend to be more acidic. Rainfall helps leach basic (alkaline) materials like calcium from the soil, so areas prone to heavy rainfall tend to have more acidic soils. Rainwater itself tends to be a bit on the acid side, which is another contributing factor to acidic soils. If you live in an arid climate, it’s likely your soil is on the alkaline side since rain doesn’t have a chance to leach any of the basic materials out. All this goes someway to explain the regional differences in crops grown in different parts of the same country.
Pentru masurarea pH-ului in sol gasim cateva optiuni. Pentru masurarile cele mai precise si sfat cu sa modificati solul, trimite-ti proba la un laborator de testare si analizare. Ei vor trimite inapoi informatii in legatura cu nivelul pH al solului Dvoastra si sfaturi cat var sau sulf trebuie folosit pentru a modifica acest nivel. Un kit pt. pH test de casa (dungi de litmus) fain sau un pH metru electronic si mai fain va aduce rezultate mai putin extravagante fara sfaturi, dar e mult mai ieftin si e un inceput bun.
There’s a few options for measuring your soil’s pH. For the most accurate measurements and precise advice on how to amend your soil, send samples from your garden to a soil testing laboratory for analysis. They’ll send you back information on your soil’s pH level and advice on how much lime or sulfur should be used to properly amend your soil. A fancy store-bought at-home test kit or an even fancier electronic soil meter from your local garden store will yield less reliable results and no amendment advice, but will give you a good place to start.
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