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Humic substances (humic and fulvic acids) are widespread, being present in soil, water, lake sediments, peat, and different coal. Therefore, there is a great interest for their immense role in terrestrial and aquatic systems, as well as their bio-stimulatory effects on plant growth. Humic substances, through their positive effects on plant nutrition and by increasing the tolerance to abiotic and biotic stress, lead to higher yields and superior quality crops. Their role in agriculture is essential, but humic subst...

The research was made in the hilly area of Southwest Romania, on the territory of Caras Severin County. The researched area has a moderate continental temperate climate. According to Koppen, the climate is classified as c.f.b.x. The annual average temperature is 10.8°C and the annual average precipitation is 631 mm. The soil type on which the research was made is typical gleisoil with a pH value in water of 6.02 and a humus content of 2.56% [5]. The dolomite used in the research was chemically analyzed in Austria,...

The research was made in the hilly area of Southwest Romania, on the territory of Caras Severin County. The researched area has a moderate continental temperate climate. According to Koppen, the climate is classified as c.f.b.x. The annual average temperature is 10.8°C and the annual average precipitation is 631 mm. The soil type on which the research was made is typical gleisoil with a pH value in water of 6.02 and a humus content of 2.56% [5]. The dolomite used in the research was chemically analyzed in Austria,...

Mesofauna is the most numerous part of soil animals. Mesofauna, along with other soil organisms, can be used as a bioindicator. In addition to the high abundance, tangible biomass and widespread occurrence, the mesofauna is characterized by the ability to respond quickly to changes in the ecosystem, the availability of species identification and the possibility of using the quantitative characteristics associated with the availability of standard conventional isolation methods for comparison. The inhabitants of th...

Approaching the issue of fertilizers with organic substances of the bio stimulants class is a difficult task as the concept is far from complete elucidation and the legislation, research and experimental activities are still incipient as this products category with agricultural use is concerned. Any substance or micro organism applied to plants with the purpose to enhance nutrition efficiency, non biotic stress bearing, and/or crops quality features regardless of their nutrient content can be generally defined as ...

The researches have emphasized that on the improved sandy soils the maize yields (the average of fertilizer rates) is higher when the corn is cropped within a crop rotation than in monoculture (table 1, figure 1). The applying of nitrogen fertilizers on improved sandy soil, along with phosphorus ones is an endorsed measure for increasing maize yield (table 2, figure 2). The influence of crop rotation and fertilizer applying has recorded high yield outputs with all experimented crop rotations as compared with the m...

Use of fertilizers and plant protection products for yield increases led to environment pollution. There is intense concern for new materials development with controlled immobilization/ holdup/release role of compounds that get involved in plant nutrition and protection. Multiple beneficial effects of humic substances upon soil ecosystem is the reason that their control and conservation take priority. Part of the research results carried out regarding humic substances (HS) holdup on biodegradable, bio polymeric st...

Among the key factors and the physical-geographical conditions of the environment in which plants grow and are harvested, the soil presents a major component, which has the role, on the one hand, of a complex indicator of the evolution of characteristics that determine the growth of plants and, on the other hand, of a depository of the influence of all other conditions and factors, faithfully and continuously recording all the phenomena occurred in a certain place and time. This is illustrated by the level of must...