Lietuvos mokslų akademijos Leidybos skyrius

Two 2-factorial field experiments were set up at the Lithuanian Institute of Agriculture in 1999–2005. The soil was loam Endocalcari-Epihypogleyic Cambisol. Soil according to the main properties is characterised as fertile (first trial) and moderately fertile (second trial). Results of the investigation by managing different tillage and fertilization (according to soil status and expected yield) systems in a 5-year crop rotation revealed that the methodology of fertiliser rate determination and application should differ in different tillage systems and in unequal soils.
The use of pre-established agro-technological measures had a similar effect on the character of P content changes in the arable layer of fertile soil: a regular decrease of P content was registered. However, direct drilling leads to a most rapid and significant decrease of P content in the arable layer as compared to traditional and reduced tillage systems in this inherently fertile soil.
The use different fertilisation levels and application of direct drilling in both fertile and moderately fertile soil showed a pronounced stratification of P content in different layers (P increase in the 0–10 cm layer versus to the 10–20 cm layer).
Direct drilling with all fertilisation levels in both fertile and moderately fertile soils leads to stratification of K content in different layers, i.e. to a marked increase in the 0–10 cm layer versus to the 10–20 cm layer.

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