Knowing the pH value, enables the farmer to treat the soil to make it more acidic or alkaline - in order to make it suitable for the crops he wants to grow.
Many plants are tolerant of wide ranges of pH but many are very specific in their pH requirements. A good example is the blueberry which will only grow in a pH below 5.
soil fertility increases soil PH
The pH of soil has a great importance for the growth of plants.
Depending on the type of soil, the value of pH and the type of pH paper. For an acid soil the pH paper from Merck (art. 9565) this color will be probable green.
While I cannot give you a properly researched answer, I just did an experiment on this exact same question, and founf that a pH of 6 was the best for bean seeds.
gardeners and farmers.
Different species of plants require different levels of soil pH.
before begining to farm one should send several soil samples for lab testing. they are testing for soil composition, pH, nutrient levels, organic matter and water permiability
Plants grow better in soil with the PH (acid-base) they have adapted to. The acidity or the alkalinity of the soil is important to know in order to grow a particular plant. Some plants want a acidic soil and some want a basic soil. However, most plants prefer a neutral to slightly alkaline soil. So, it is important for the farmers to know what type of soil it is in order to balance or neutralize the soil. They should know what type of inorganic substance/fertilizer to add in order to neutralize the soil.
the way that farmers change the PH of soil is by adding a little bit of lime or eggshells or oyster shells because they are all good ways to make it neutralize.
the health of the soil determines the health of their crops.
Farmers need to test the pH level in the soil because, as you should know, both acidic and alkaline soil damage the crops a lot and ruin the hopes of a farmer. You say,"Why?" Acids and alkalis are corrosive and will eat into the plant's roots. Neutral soil alone can support plant growth.... while the answer above is mostly correct the main reason to test pH levels is its effect on nutrients availability. for example at a pH level of 5.5 iron is 100 times more available to plants then at pH 6.5 but at pH 4.5 aluminum starts to be absorbed by the plant and it is poisoness to it. most plants can grow in soil from pH 5.5 to 8.0 but each has its favorate level
Acidic or basic (alkline) is measured By Ph. Every plant has an ideal Ph at which it likes to grow. It also has a range at which it will still survive. Kniwing the Ph tells the Farmer what plants will grow in a given soil. It also by implication suggests what plants will modify the ph in the process of their growtrh cycle or what soil amendment could be used to modify the soil slightly.
They add lime to it so is editds the PH balance
Many plants are tolerant of wide ranges of pH but many are very specific in their pH requirements. A good example is the blueberry which will only grow in a pH below 5.
Different plants do well at different pH levels in the soil. So if you are trying to grow something, you will want to know if the soil has the right pH, so that if it doesn't, you can correct it by adding the appropriate chemicals.
Chalk is sometimes added to soil to raise the pH of acidic soils. Calcium, the primary component of chalk, is also an important secondary nutrient for healthy crop growth.