The administration of large quantities of chemical fertilizers may strongly diminish the plant diversity of semi-natural grasslands. In the Apuseni Mountains (Romania), the chemical fertilization is rarely used, but, considering the population’s decrease and the livestock diminish, this might have a greater importance in the future. The maintenance of semi-natural grasslands within the mountainous landscape depends greatly on fertilization. Our paper’s goal is to assess the influence of mineral fertilizers upon semi- natural grassland’s plant diversity. Mineral fertilizers complex NPK 20:10:10 ratio was applied in three quantities: 50N 25P 25 K, 100N 50P 50K, and 150N 75P 75 K. The large quantities of mineral fertilizers generated a considerable decrease of the plant diversity.

Soy protein is the most inexpensive source of high-nutritional quality protein and therefore is the world's predominant commercially available vegetable protein. In order to keep this levels of fat and proteins at higher standards studies need to be develop in order to highlight the factors affecting soybean quality. The aim of our research was to analyse the variations in soybean protein and fat content and thru this to highlight the optimum management of nutrients for achieving high quality soy products. The experimental field was placed in the Agricultural Research Development Turda (ARDS) in 2013. The biological material consists in a genotype of soybean created at ARDS Turda -Felix variety. The experimental plots were installed after the subdivided parcel method and were fertilized with mineral and organic fertilizers in 4 different doses. In order to accomplish our goal we followed soy content in protein and fat under the influence of the inputs applied. Analysing the data recorded we observed a low influence of the experimental factors on soybean seeds content in fat substances. In the same time the protein content varies significantly under the influence of the technological inputs applied. The highest increases in protein content are achieved when organic fertilizer is applied. The results showed an interesting evolution of soybean chemical content under the influence of differentiated fertilization and also some interesting correlation between chemical content and some production indexes.

The challenge for the research in crop and animal husbandry is how to determine the quality of a speci¬fied crop as a forage for ruminants by the chemical analysis of only a small amount of sample". Since more than hundred years scientists try to give an answer to that question. The most applied is the Weende and Van Soest system, together with the digestibility in vitro technique developed by Tilley and Terry. During the last decennia also non destructive methods, like the Near Infrared Reflectance Spectroscopy NIRS, are used more frequently. Forages contain a lot of quality parameters (protein, fat, sugars, structural carbohydrates, vitamins, … but some of them contain also anti quality components (alkaloids, nitrates, …). The diet of domestic ruminants exists of more than only 1 component. Other diet components may interfere and mostly result in a synergism. The combination of a protein rich forage (legumes) with starch riches ones results in better animal productions than given as sole diet component. Fast and reliable non destructive methods are more attractive and acceptable than laborious, polluting and animal unfriendly ones.

Within Europe, half the annual requirement for feed is provided by grass. However, although the EU is a net exporter of feed grain it is a substantial importer of protein and non grain feed ingredients. For several economical and ecological reasons there is a renewed interest to grow forage legumes and the European Union strengthen the role of protein-rich crops, by providing a supplementary payment for farmers producing these crops. In order to develop sustainable, legumebased live stock production systems, we need to understand the complex relationships that exist between herbivores and the plants they consume. To increase farmers confidence in the use of forage legumes, it is necessary to have more reliable establishment techniques and to reduce the variability in legume contribution within and between years, particularly for legumes in mixed swards.

The red clover culture gives good results in Transylvania. Our experience has followed the behavior of red clover mixture and Lolium multiflorum in depression Odorhei Secuiesc, following the application of different doses of liquid fertilizer (gull) and manure. We experienced liquid fertilizers (gull) as more dairy farms are built on systems to water slurry. In this paper we present the evolution of D.M. harvest and green mass due to the fertilizers presented.