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Effects of farmyard manure compost and biodynamic preparations

Long-term trial at IBDF Darmstadt (since 1980)

1980-1984 Yields

First period (research focus: Food quality)

**Yields (dt ha^-1) of different crops cultivated with manure (CM, CMBD) and mineral fertilization (MIN) at 3 levels**
		MIN	CM	CMBD	low	medium	high
Carrots	1981 1982 1983 1984	713 602 736 615	710 667 784 625	759 637 860 631	692 605 731 573	726 657 792 632	764 645 858 666
Beetroot	1981 1982 1983 1984	617 618 682 624	620 724 648 574	648 693 732 612	567 544 562 519	619 710 702 602	700 782 798 688
Potatoes	1981 1982 1983 1984	335 254 219 193	277 255 180 244	327 281 195 260	291 254 162 184	315 262 205 238	333 274 228 275
Rye	1982 1983 1984	25,4 38,2 48,4	23,2 33,8 48,3	23,1 36,3 48,7	23,5 30,2 39,8	23,0 37,1 48,8	25,3 40,9 56,8

The main objective when calculating fertilizer amounts, namely to realize comparable yields with organic and mineral fertilization, was essentially achieved.

Thus it was possible to monitor quality parameters of the products without interference by effects of different yield levels.

Reference: ABELE (1987)

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