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• Agronomical and economic evaluation of different soil cultivation systems

  47-52

  Dénes Sulyok

  Views:

  218

  In the interest of profitable plant production and environmental protection, we have to make an effort to protect and improve the productivity of our soils while moderating production limiting factors. Due to different soil cultivation methods, the quantity of yield and required expenses also differ.
  We examined the production costs in four different production technology systems. Overall, it can be said that farming standards are good, since cost prices were low (2001: 14-15 HUF/kg, 2002:15-21 HUF/kg, 2003: 39-49 HUF/kg) in the case of all main products per 1 kg. Cost prices were lowest in the case of direct sowing, probably due to low machinery costs.
  All economic indicators have to be compared when choosing the most suitable production technology in a specific farming environment.

• The effect of long-term fertilization on the 0.01 M CaCl2 extractable nutrient content of a meadow soil

  73-79

  Emese Bertáné Szabó

  Views:

  211

  During my research, I studied the 0.01 M CaCl₂ extractable NO₃^--N, NH₄⁺-N, Norg, P and K contents of the soil samples originated from a long term fertilisation trial in the experimental site Hajdúböszörmény. Relationships among the soil nutrient contents, the agronomic nutrient balances of the 2009 year, and fertilization were studied. 
  From the results of the study it was concluded as follows:
  – Fertilization significantly increased the CaCl₂ extractable NO₃^--N, NH₄⁺-N, and K contents of soil.
  – Norg fraction increased as a function of the increasing yield. Hence, it can be assumed that the greater the produced yield, the more the stubble and root residues remain on the arable land. These organic residues can result significant increase in the Norg content of soils.
  – The CaCl₂ extractable P and K contents were compared with the calculated P and K limit values. According to these, the experimental soil has a good phosphorus and lower potassium supply capacity. These results are in accordance with the results of the conventional Hungarian fertilization recommendation system.
  – It can be stated that the 0.01 M CaCl₂ is able to determine not just inorganic N forms but Norg fraction as well that characterize the easily mineralizable nitrogen reserves. The results proved that AL-P and -K (ammonium lactate acetic acid, traditional Hungarian extractant) are in good agreement with the P and K reserves, but it is important from the aspect of environmental protection and plant nutrition to measure the easily soluble and exchangeable K-, and P-contents of soil. 0.01 M CaCl₂ method is recommended for this.