Hyperspectral analysis of the content of the alkali-hydrolysed nitrogen in the soil of a millet field

Abstract

Nitrogen, one of the key nutrients essential for plant growth in soil, plays a crucial role. Organic matter in the soil can be decomposed by microorganisms into inorganic nitrogen. The level of alkali-hydrolysed nitrogen (AHN) is increased, which is beneficial for plant absorption and utilisation. As a major source of nutrients for plant growth, soil nutrient content is an important indicator for evaluating the environment for plant growth. Rapid access to soil nutrient information is an important requirement for the development of modern precision agriculture. As a major component of soil, soil nitrogen is an important indicator of soil fertility. Under certain conditions, the nitrogen content level marks the soil fertility level. It is the main source of nutrients needed for plant growth. Soil nitrogen plays a critical role in plant growth and development. Nitrogen deficiency affects the protein content of crops. When organic matter decomposes, most of the nitrogen undergoes conversion to inorganic nitrogen and is then released into the soil (Tahmasbian et al. 2018).