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Termine

Effects of farmyard manure compost and biodynamic preparations

Long-term trial at IBDF Darmstadt (since 1980)

1988-1991 Fertilizer and nutrient amounts

Second period (research focus: Soil biology)

**Nutrient amounts (kg ha^-1) applied yearly with farmyard manure with (CMBD) and without (CM) biodynamic preparations and with mineral fertilizer (MIN) to winter rye.**
		Low			Medium			High
		N	P₂O₅	K₂O	N	P₂O₅	K₂O	N	P₂O₅	K₂O
CM	1st app.	60	47	58	80	63	78	100	78	98
	2nd app.	-	-	-	20	11	31	40	22	59
CMBD	1st app.	60	47	57	80	62	76	100	78	95
	2nd app.	-	-	-	20	11	31	40	22	62
MIN	1st app.	60	50	75	80	75	100	100	100	125
	2nd app.	-	-	-	20	-	-	40	-	-

Because fertilizer amounts were calculated on the basis of nitrogen contents alone, the amounts of phosphorus and potassium applied in the manure treatments varied from year to year depending upon the manure properties in a given year. The data presented in the table for CM and CMBD are averages of the years 1988-91; in MIN the same amounts were applied every year.

Application dates: To winter rye, manure was applied before sowing and mineral fertilizer in early spring. The second N application was in mid-March (CM, CMBD) and in mid-May (MIN). The second application was calcium ammonium nitrate in MIN, and castor meal (1988 and 1989) or liquid manure (1990 and 1991) in the organic treatments.

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