ISSN 2285-5785, ISSN CD-ROM 2285-5793, ISSN ONLINE 2285-5807, ISSN-L 2285-5785


Published in Scientific Papers. Series A. Agonomy., Vol. LVI
Written by Adrian Ioan POP, Teodor RUSU, Ileana BOGDAN, Paula MORARU

The cultivated plant production is the result of the interaction of all factors which participate on way or another in the formation of the harvest. The level of harvest is proportional to the degree to which each factor and all of them together are getting close to the optimum values required by the biology of the plants, following that the soy production recorded in the experimental years in the Somesan Plateau is proportional to the soil tilling systems, the preculture plant and the climatic conditions. The analisys of soy productions by the soil tilling system and the preculture plant confirms the above mentioned, with larger productions with values between 1775 kg/ha and 1883 kg/ha after wheat preculture, and respectively 1467 kg/ha and 1757 kg/ha after corn preculture. The production differences determined by the preculture plant vary depending on the soil tilling system and have values between 5.8-21%. In the classic soil tilling system alternatives and the unconventional systems, the growth determined by the preculture plant is the smallest, with values between 6-7%, which means that their beneficial effect was taken over by the soil tilling, thus recording the largest productions, regardless of the precultures.In the harrow soil tilling system alternative, less favourable for the soy cultures, the harvest growth determined by the preculture plant reaches a maximum on experiment of 21.0%. A large increase determined by the preculture plant is also recorded in the chisel tilling alternative, in which the growth reaches 11.6%. From the above mention data analisys, it follows that when the soil tilling is favourable to the cultivated plant, the preculture plant`s contribution is less significant, and when the soil tilling doesn`t manage to favour the cultivated plant, we can suppose it`s the water factor in our situation. The preculture plant which ensures a larger period of time from harvesting to the soy culture sowing is more efficient concerning the level of production.

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