Until the mid 19th century organic manures were the only way of returning plant nutrients to soil and in some countries organic manures are still the principle source of nutrients. The increasing use of mineral fertilizers during the last 150 years has made a major contribution to increasing food production worldwide. Mineral fertilizers are easy to handle and can be applied with precision with reasonable certainty about their effectiveness. Organic manures are bulky, expensive to transport and contain small amounts of nutrients per unit volume. In addition, the amount and rate of release of nutrients from organic manures is often difficult to predict with accuracy, especially for nitrogen. Some of the benefits and concerns about the use of organic manures are discussed in this paper.
Soil organic matter (SOM) plays an important role in terrestrial ecosystems and agroecosystems. Changes in the agricultural sector in the Czech Republic within the past 25 years have had a negative impact on SOM content and contribute to gradual soil degradation. The aim of this study is to estimate the effect of long-term application of different mineral fertilizers (NPK) and organic manures (manure, cattle slurry) on soil chemical properties (quality of humus, available nutrients, and soil reaction).
| Size | XS / S / M / L |
| Color | White/ Black/ Teal/ Brown |
| Properties | Variety of OrganicMineral Products |
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