Contents 1. Introduction 2. Soil acidity and its indices 2.1. Actual acidity. 2.2. Potential acidity. 2.3. Cation (positive ion) exchange capacity and saturation with bases. 3. Natural reasons for increasing soil acidification 3.1. Leaching regime. 3.2. Soil-forming rocks and plants. 3.3. The distribution of acid soils. 4. The reasons for anthropogenic acidification of soils. The phenomenon of ...

carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), potassium (K), sulfur (S), calcium (Ca), magnesium (Mg), boron (B), chlorine (Cl), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), nickel (Ni), and zinc (Zn). These 17 essential elements, also called nutrients, are often split into three groups (fig. 1). The first group is the three macronutrients that plants can obtai...

The purpose of the research was to evaluate changes in agrochemical properties sour cherry orchard soil after permanent fertilization with urea and potassium sulfate. field experiment conducted during 2017-2021 climatic conditions Central Russian Upland (Oryol region). ‘Turgenevka’ trees grafted on rootstock V-2-180 were planted 2015 at a distance 5x3 m. is loamy Haplic Luvisol following parame...

Cultivated for its richness in nutrients, tomato culture is demanding fertilizer, especially calcium. Calcium deficiencies and physiological disorders cause serious diseases tomatoes. Blossom end rot (BER), susceptible cultivars, may severe economic losses. The goal of this study to determine the effect three organic calcium sources on growth quality fruit production Egg, snail sea shell powder...

The present investigation deals with the role of Plant Growth Promoting Rhizobacteria and chemical fertilizers alone or in combination on urease, invertase and phosphatase activities of rhizospheric soil and also on general impact on growth of safflower cvv. Thori and Saif-32. The PGPR (Azospirillum brasilense and Azotobacter vinelandii) were applied at 10cells/mL as seed inoculation prior to s...

Deterioration of soils over the years has led to a decline in crop yields and nutritional qualities, resulting from oversupply conventional fertilizers, which are unsustainable, costly pose threat environment. Nanoparticles gaining reputation field agriculture for remediation soil degradation sustainable way. Recently, they have been recognized as potential fertilizers with properties that make...

A field experiment was conducted to assess the effect of farmyard (cattle) manure (FYM) and inorganic nitrogen (N) phosphorus (P) fertilizers on growth and tuber yield of potato (Solanum tuberosum L.). The treatments consisted of factorial combination of 4 levels of FYM (0. 10, 20 and 30 t h-1) and three levels of inorganic NP fertilizers (0, 33.3%, 66.6% recommended rates) laid out in a Random...

This Bulletin discusses several manufacturing processes for organic compound fertilizers overseas and in Taiwan. The different formulations of N-P2O5-K2O in the fertilizers are also reported. The yield response of different crops from the application of organic compound fertilizer reflects their superiority over organic fertilizers. Experiments also showed that the use of organic compound ferti...

ome organic fertilizers are suitable for greenhouse crops and can also fit the current ways of applying fertilizers commercially. However, not much information is available on plant response, nutrient supplying power, or the environmental impact of nutrient leaching with organic fertilizers. Not surprisingly, because of their differences in the makeup, levels of success in growing acceptable gr...

The investigation of the mechanisms organic matter transformation in compost fertilizers is an urgent task modern soil ecology and chemistry. main components such are newly formed, weakly humified labile humic acids (HAs). objective study to determine mechanism converting formed HAs into forms with increased resistance microbiological biochemical influences. Obtained during plant residues decom...