Effects of Organic Farming Systems and Crop Rotations on Crop Productivity and Properties of Haplic Luvisol.

The trials were carried out at the Voke Branch of the Lithuanian Institute of Agriculture during the period 2003-2007 and were designed to investigate the influence of organic (without fertilizers) and sustainable (the plants were fertilized only with bonemeal as a source of phosphorus and magnesia of potassium as a source of potassium) farming systems on crops and to explore their productivity, chemical properties of soil and balance of nutrients in the soil. The data of investigation show that productivity of plant rotations depends to the cultivated plants and the applied farming system. The highest yield was reviewed cultivating plants after green manure (lupines and white mustard) in two farming systems. Crop rotations had no effect to the soil acidity and increased total nitrogen and organic carbon content in the soil. Phosphorus amount in the soil increased in all farming systems, potassium only in sustainable farming system. The data about the number of micromycetes, organic and mineral nitrogen assimilating bacteria in the rizosphere soil of various grown plants are also presented. [ABSTRACT FROM AUTHOR]