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• The Correlation between Nitrogen and Vitamin C Content of Celery in Sandy Soil

  327-331

  Judit Pető

  Imre Cserni

  Attila Hüvely

  Viktor József Vojnich

  Zsuzsanna Tóthné Taskovics

  Views:

  92

  In our series of experiments celery test plants were used in lysimeter type pots. Plant growth, nutrient content and the relationships of them were observed. This publication shows the effects of different doses of nitrogen fertilizer (absolute control, basic +60/120/180 kg/ha N, and the base + 240 kg / ha N (calculated N from manure). The nitrogen content of the celery increased significantly depending on the N-doses; and a strong positive correlation (r = 0.815, p < 0.025 level) was detected in the tubers between N content and vitamin C. Our results establish that in our experimental setup on sandy soil, organic fertilization - enriching the colloid content and improving soil structure - proved to have the most beneficial effects.

• “The earthworm is the best workmate of the farmer”– or beneficial effect of minimal soil disturbance on soil structure

  250-258

  Attila Barczi

  Tamás Harrach

  Valéria Nagy

  Views:

  114

  In recent decades in Germany the soil structure is greatly improved on a substantial part of the  rable land. Soil erosion can be observed less commonly. Since the 1970s in Germany the intensity of soil disturbance is significantly reduced. The less disturbed soil has more mechanical load, namely the stability. The perforated structure with stable biopores ensures ecological functions, such as infiltration, aeration, root permeability, fertility. For this reason, soil compaction and soil erosion occur less frequently, they can be detected only in exceptional cases. But in Hungary, the same can not be said therefore it is a desirable objective to explore the cause of differences. Usually the best soil structure can be found on the arable lands without rotation cultivated. In Germany we could study the condition of soils in farms which using no-till system. We have analyzed the effect of soil cultivation methods on the soil structure.