زمین کی پی – ایچ کو کم کرنے کے طریقے ہیں ۔ جن میں سے کچھ کم دورانیے کے اور کچھ زیادہ دورانیہ کے ہیں۔
1 – نامیاتی مادہ
لمبے عرصہ کے دورانیہ میں یہ سب سےاہم اور مؤسر طریقہ ہے۔
1 – Organic matter :
Different organic matters, such as compost, manure that has been composted and acidic mulches can slowly decrease your soil pH with the passage of time. When organic matter is starting decompose, useful bacteria and different micro organism feed it and grow, hence create an acidic by-products during this process. As organic matter requires time for decomposing to change the soil, so this method is good to achieve long term target. But it won’t give you very effective results in the short time.
Organic matter provides the soil many benefits like increasing its drainage and aeration.
2 – Aluminum sulfate :
For fast pH-decreasing, slow decay of organic matter will not be effective. So use few acidic soil additions in which, aluminum sulfate, is one of the fastest performing options. Aluminum sulfate adds acidity in the soil as it is dissolved there, as it works rapidly. Due to which, aluminum sulfate is a best option for urgent pH decreasing.
Depending on the starting pH of your soil, the amount of aluminum sulfate you should use can vary significantly. In very general terms, you should expect to use about 1.2 pounds of aluminum sulfate to lower the pH of a 10-square foot patch of soil by one on the pH scale (e.g., from 7.0 to 6.0, from 6.0 to 5.0, etc.). However, using too much additive can be harmful to your plant, so consult an online resource (like the one here) for more precise usage information.
3 – Add sulfur :
Another useful pH-lowering soil additive is sublimed sulfur. Compared to aluminum sulfate, sulfur is generally cheaper, more powerful (in terms of the amount needed) and slower-acting. This is because sulfur needs to be metabolized by bacteria in the soil to be converted to sulfuric acid, which takes time. Depending on the moisture of the soil, the amount of bacteria present, and the temperature, sulfur can take up to several months to produce a noticeable effect in the soil.
As noted above, compared to aluminum sulfate, you will generally need a relatively small amount of pure, sublimed sulfur to produce an equivalent pH change. In general, you’ll need about 0.2 pounds of sulfur to lower the pH of a 10-square foot patch of soil by one whole number on the pH scale. Consult an online resource (like the one here) for more precise usage information.
4 – Add sulfur-coated urea :
Like sulfur and aluminum sulfate, soil additives containing sulfur-coated urea can increase the acidity of soil over time (lowering its pH). As an additive, urea is fairly quick-acting, producing some effects as soon as a week or two after being introduced to the soil. Sulfur-coated urea is a common ingredient in many fertilizers, so if you were already planning on fertilizing your plants, you may want to save yourself the trouble of finding a separate soil additive by simply picking a fertilizer containing this type of urea.
Sulfur-coated urea content will vary from fertilizer to fertilizer, so consult the instructions that come with your fertilizer to determine the right amount to use for your gardening needs.
5 – Add another acidic additive :
Besides the additives listed above, many other substances can lower soil pH. Many of these substances are often included in certain fertilizer mixes, while others are sold on their own.Additives that can lower your soil pH: