Viorel Budiu

ECONOMIC EFFICIENCY OF LETTUCE CROP IRRIGATED THROUGH DIFFERENT METHODS

The research purpose of this paper, was to determine the economic efficiency of irrigation on lettuce cultivated in a protected area, while aiming to attain early crops of high quality, at low specific costs. From an economical point of view researches showed that micro-sprinklers irrigation is recommended. Though the yields are lower using this method, they are enough to determine a higher gain.

RESEARCH ON WATER CONSUMPTION FOR ONION GROWING IN PRE-MOUNTAINOUS REGION OF THE APUSENI MOUNTAINS

Water consumption in onion growing was determined for different types of irrigation: 50% of AHC (Active Humidity Coefficient), 70% of AHC and no irrigation just organic fertilization or organic and mineral fertilization. Research was carried out in 2008 and 2009 using the direct method of determining the amount of water in the soil (the water balance).

FEATURES OF THE BERTALANFFY-RICHARDS GROWTH MODEL

One of the major problems of the environment is the landslide and the forest plays an important role in this problem. In our country in the latest years had place massif deforestation. One possible solution of this is the forestation and for the good results are necessary studies of the growth for the forest. We start to study this issue in the paper [1]. Soil erosion and landslide are some of the prevalent land degradation process on Romania. The land with slope greater than 5% represents 67% from the territory of Romania. The fast soil erosion is favoured by the geomorphologic and litological conditions. The decreasing of the areas covered by forest represents the most important factor for the soil degradation. The surface covered by forest represents 27% from the territory of Romania.