The tandem long-term program 2012-2021 and some results on the rehabilitation of soil biology of intensively farmed agricultural land in Germany
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In recent decades, intensively used agricultural land in Germany has lost much of its natural soil fertility due to the use of extremely high levels of mineral nitrogen fertilizer and the intensive use of pesticides. Since 2005, we have been attempting to improve the biological soil fertility of these intensively used areas on about 170 agricultural areas with different soil indexes. The international long-term program Tandem12/21 (2012-2021) and the two previous research projects Radostim A*B (2005-2008) and future9/12 (2009-2012) have been investigating the potential of phytohormone-humic acid combinations (PHC) to increase soil biological fertility and to create a biological nutrient reserve in the soil.
 W. Nowick - The bioactive PHC - phytohormone - humic acid compositions of the series TANDEM and results of their long-term effect on productivity of plant production in Germany - XIV Conference daRostim2018 Biologically active preparations for plant growing - Belarusian State University, Minsk, 2018, P. 16-19.
 W. Nowick, I. Semenjuk, E. Karpenko - Sravnytelʹnye yssledovanyja dejstvyja humynovykh preparatov dlja sezonnoj obrabotky pochvy na opytnykh poljah Germanyy v ramkax prohrammy Tandem12/21 - XII Conference daRostim2018 Biotechnology for agriculture and environmental protection - Odessa I.I.Mechnikov National University, Odessa, 2016 , P. 173-177.