After reading this article you will learn about nitrogen in relation to physiology, growth and response of crops. Nitrogen in Relation to Physiology of Plants Nitrate (NO3—N) and ammonium (NH4—N) are two major forms of inorganic nitrogen taken up by the plants. Most of the ammonium has to be incorporated into organic compounds in the plant roots, whereas nitrate is [...]
After reading this article you will learn about the chemistry and behaviour of phosphorus present in soil. Chemistry of Phosphorus: 1. Sorption Reactions: The surfaces on which phosphate ions enter into sorption reactions of two types-surfaces of constant charge e.g. crystalline clay minerals and surfaces of variable charge including Fe3+ and Al—oxides and organic matter where H+ and OH- ions [...]
After reading this article you will learn about:- 1. Content of Potassium in Soil 2. Sources of Potassium in Soil 3. Forms 4. Deficiency. Content of Potassium in Soil: A large portion of total K in soils comes from the K-bearing and crystal lattices of silicate minerals. The micas (muscovite and biotite) and the feldspars (orthoclase and microcline) constitute the [...]