Soil pH Detection

“Towards digital soil morphometric”, author described how proximal soil sensing and other tools can be used in soil profile descriptions where techniques and toolkits have not changed in the past decades. Digital soil morph metrics is defined as the application of tools and techniques for measuring and quantifying soil profile attributes and deriving continuous depth functions. The application of such tools is compared to standard soil profile descriptions for 11 common attributes: Horizons, texture, color, structure, moisture, mottles, consistence, carbonates, rock fragments, pores and Roots. These attributes are extensively used in soil classification and are indicative of many soil functions. Commonly, a soil profile is divided into genetic horizons and the attributes are described, sampled and its properties analyzed in the laboratory. The information is used to classify soils and for interpretations of soil functions. Interpolative functions using the analytical data from soil horizons have been developed to estimate soil property values at any depth or depth class.

In, “Determination of soil pH by using digital image processing technique- A review” Image processing has been proved to be an effective tool for analysis in various fields and applications. In agriculture sector the parameters like quantity and quality of products are the important measures from the farmers ‘point of view’. Soil is recognized as one of the most valuable natural resource whose soil pH property used to describe the degree of acidity or basicity which affects nutrient availability and ultimately plant growth. Ph of 7.0 is neutral and soils above or below this value are either alkaline or acidic. The pH of soil is an important factor in determining which plants will grow because it controls which nutrients are available for the plants to use.

A soil analysis is a process by which elements such as P, K, Ca, MG, Na, S, Mn, Cu, Zn are chemically extracted from the soil and measured for “plants available “content within the soil sample. Soil pH can be determined from soil color using digital image processing techniques. In which digital photographs of the soil samples were used for the analysis of soil ph. Soil colors are the parts of visual perceptual property where digital values of red, green and blue (RGB) provide a clue for spectral signature capture of different pH in soil.

“Determination of soil pH by using digital image processing technique”, The technique based on digital image processing technique in Remote Sensing is used where digital photographs of the soil samples were used for soil pH determination. Digital photographs were collected during sunlight. RGB values in deep brown colored soil. Correlation between digital value and soil pH values should be helpful in determination of soil pH of different type of soils.

In, “Soil Analysis-Determination of pH of Soil- 2014”, this paper explores the significance of soil pH and pH table for various agricultural crops. This paper discusses the importance of soil ph. The procedure to calculate pH using pH meter is explained. Principle of Potentiometric Method is based on the measurement of potential, developed across a glass electrode due to the difference activity of H+ ions in and out of the electrode. The potential difference between the glass electrode and calomel electrode is expressed in PH unit. It provides information on the potency of toxic substances present in the soil. It is indicative of the status of microbial communities and its net effect on the neutralization of organic residue and the immobilization of available nutrients.

Ascertaining the soil pH provides the most rational basis for managing soil for selected agricultural crops. The pH measure of soil in water and KCl systems provides information on the nature of charge discharge on soil colloids which will have a far recharging effect on nutrient measurement and reaction.