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.

In general, in the West European countries, countries with a developed growing animals sector, the surfaces covered by seeded meadows is in continuous growth (Rotar,2010,2011). Carlieretal. (1998), underlines the fact that seeded meadows have valuable attributes, unequaled by those registered by other forage crops.  Among these stands, first of all, the high yields, this can be 3-5 times larger than those achieved by permanent grasslands. Our study followed the behaviour of Medicago sativa and Bromus inermis  fertilized with gulle and manure, on an experience located in Cobatesti village, Odorheiul Secuiesc area. Our experience was installed after the subdivided parcels method, on a loamy soil. The mixture showed different reactions, according to the type of fertilizer applied. The highest yield registered on the experiences fertilized with manure was 12.59 t/ha DM, when 30 t/ha manure were applied, and the highest yield registered on the experiences fertilized with gulle was 14.26 t/ha DM, when 5 t/ha gulle were applied.The mixture consisting in Medicago sativa and Bromus inermis showed to be very productive and suitable for drought areas.

Seeded lawns is one of the most important links in the process of improving the forage base, ensure feed quality with high productivity. Mixtures of red clover crops (Trifolium pratense) with perennial grasses (Lolium multiflorum, Phleum pratense and Poa pratensis) has high productivity due to better utilization of ecological niches of the biotope (ROTAR I.et al.). These crops has advantages like high content of protein because of the red clover, economy-based fertilizer nitrogen from atmospheric nitrogen fixation by bacteria Rhizobium spp. located in the root of legumes. These seeded pastures get a balanced feed nutrients (proteins, carbohydrates, lipids), have a high palatability. The species Trifolium pratense has a greater capacity to restore the soil structure and also the enrichment of the macro-elements, like phosphorus and potassium (CARLIER L., et. al). Our experience took place in the village Simonesti, Cobătesti village of the Harghita county. The experimental field was located respecting the experimental technique rules in randomized blocks with a technique that includes three variants based on red clover plus a perennial grass (Lolium multiflorum, Poa pratensis and Phleum pratense). Every version was fertilized with two types of fertilizer: one liquid (gull) and one solid (stable manure) in four different doses in all three variants. The doses were: V1 = 0 gull; V2 = 5 t / ha gull; V3 = 10 t / ha gull; V4 = 20 t / ha gulle and V1 = 0 stable manure; V2 = 10 t / ha stable manure; V3 = 30 t / ha stable manure and V4 = 50 t / ha stable manure. In our studies we present the influence of fertilization with gull and stable manure on yield of green mass of all three variants. In general, both gull fertilization with manure favors grasses at the expense of installing legumes. The higher doses of fertilizer increase, the share of participant of grasses increases.

In sustainable view and given the new climate and demographic phenomena, the mountains must be a clean living environment, supplier of energy, biodiversity and food for humans and animals, adequate safety measures and good management, with continued compliance with the balance agroforestry and preventing human depopulation and agricultural traditions and cultural degradation. Oligotrophic grasslands from Gârda de Sus village was a subject of Arnica Project (2004-2007, www.arnica-montana.ro). This project aimed at sustainable exploitation of Arnica montana L. species benefit and welfare of local people. So, oligotrophic grasslands have managed so as to maintain the species Arnica montana L. in abundance-dominance as possible. Following this project was set into remote exploit local species Arnica montana L. and that capitalize on the international market as certified product. Interests of entrepreneurs are to maintain the existing flora in the oligotrophic meadows. The obiective of our study is to evaluate the effect of low-inputs on a grassland of Arnica montana  L. from boreal floor, Gârda de Sus, Apuseni Mountains, Romania. In Apuseni Mountains, extensive grazing and extensive meadow management practices have been typically for subsistencebased or small-scale farming systems in areas of low agriculture productivity. However, longer term effects of these grasslands need to be investigated.