MECHANICS OF POPPY SEEDS

Figures & data

Table 1. Scheme of Tested Varieties

Variety	Maturity Stage*	Desicant**	Desication Date	Harvesting Date	Test Date	Water Content (Wet Basis)
Lazur	G	no	–	Aug. 8	Aug. 8	–
	G-B	no	–	Aug. 8	Aug. 8	23.5
	M	no	–	Aug. 8	Aug. 8	16.5
	S	no	–	Aug 15	Sept. 12	8.0
Opál	G-B	no	–	Aug. 8	Aug. 9	23.7
	M	no	–	Aug. 8	Aug. 8	16.0
	M	Li+Sp	Jul. 21	Aug. 8	Aug. 8	15.4
	M	Ra+Sp	Jul. 21	Aug. 8	Aug. 8	15.8
	M	Sp	Jul. 21	Aug. 8	Aug. 8	16.5
	S	no	–	Aug. 15	Sept. 12	8.0
Przemko	M	no	–	Aug. 8	Aug. 8	17.5
	S	no	–	Aug. 15	Sept. 12	8.0
Albin	S	no	–	Aug. 15	Sept. 12	8.0

*G – green, G-B – green-brown, M – matured, S – stored.

**Li+Sp – Liberty+Spodnam, Ra+Sp – Raundap+Spodnam, Sp – Spodnam.

Figure .1. Typical deformation curves (variety Lazur). Maturity stages: Green (1a), Green-Brown (1b), and Matured (1c). Y.P. denotes location of yield point(s) on deformation curve(s).

Figure 2. Mean values of seed diameters for the tested samples. The bars denote standard deviations of the samples.

Table 2. Mean Values of the Measured and Recalculated Parameters (LSD–Least Significant Difference)

					Bio-Yield Point						Maximum Force
			Initial Slope		Deformation		Force		Deformation Work		Deformation		Force
Variety	Maturity Stage*	Desicant**	(N/mm)	(MPa)^+	(mm)	Relative (-)^+	(N)	Pressure^+ (MPa)	(mJ)	Relative (mJċmm^−3)^+	(mm)	Relative (-)^+	(N)	Pressure^+ (MPa)	d (mm)
Lazur	G	no	3.94	3.9	0.323	0.420	1.21	6.30	0.153	15.0	0.512	0.660	2.08	6.9	0.772
	G-B	no	2.67	6.2	0.246	0.291	0.98	6.10	0.108	16.4	0.595	0.694	1.98	5.1	0.855
	M	no	5.66	17.1	0.266	0.403	1.82	13.3	0.232	37.9	0.411	0.607	2.91	14.3	0.671
	S	no	13.33	35.9	0.229	0.300	2.46	18.6	0.292	55.8	0.499	0.655	5.96	20.2	0.759
Opál	G-B	no	4.04	8.9	0.255	0.286	1.44	8.30	0.166	22.7	0.635	0.709	3.05	6.9	0.895
	M	no	6.25	19.0	0.294	0.424	1.87	12.7	0.273	38.0	0.434	0.616	2.85	13.5	0.694
	M	Li+Sp	6.39	19.3	0.289	0.411	2.25	15.6	0.300	42.3	0.445	0.615	3.71	17.2	0.705
	M	Ra+Sp	5.53	16.4	0.270	0.380	1.72	12.6	0.220	35.7	0.452	0.626	2.59	11.4	0.712
	M	Sp	5.21	15.9	0.296	0.444	2.25	15.1	0.294	40.1	0.413	0.607	2.80	13.4	0.673
	S	no	11.84	30.7	0.271	0.338	2.20	14.1	0.310	43.9	0.531	0.668	5.51	17.1	0.791
Przemko	M	no	5.10	14.0	0.293	0.388	1.89	11.9	0.248	32.0	0.486	0.646	3.18	11.8	0.746
	St	no	12.81	31.7	0.267	0.327	2.44	14.6	0.364	47.7	0.559	0.681	6.38	18.1	0.819
Albin	S	no	8.56	23.4	0.332	0.451	2.46	14.2	0.445	42.0	0.467	0.632	3.46	14.4	0.727
LSD (p=0.05)			1.20	2.2	0.044	0.095	0.25	5.7	0.046	18.0	0.056	−0.03	0.87	1.9	0.056

*G – green, G-B – green-brown, M – matured, S – stored.

**Li+Sp – Liberty +Spodnam, Ra+Sp – Raundap+Spodnam, Sp – Spodnam.

⁺Values corrected to seed dimension; factors (d – seed diameter): slope – 2/d, deformation – 1/d, force – 4/(πdx), where x is deformation in mm, deformation work –24/(πdx²).

Figure 3. Mean values of Recalculated Initial Slopes for the tested samples. The bars denote standard deviations of the samples.

Figure 4. Mean values of Relative Bio-Yield Pressure for the tested samples. The bars denote standard deviations of the samples.

Figure 5. Mean values of Relative Work up to Bio-Yield Point for the tested samples. The bars denote standard deviations of the samples.