Response of castor (Ricinus communis L.) to organic fertilizer application and sowing date in the humid tropics | OCL

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Table 6

Effects of sowing date on seed yield and some yield attributes of castor in 2021 and 2022.

Sowing Date (SD)	WTS	100SWT (g)	SH%	SYD (kg/ha)
2021
Sowing date (SD)
SD1	8.3^a	33.4^a	10.9^a	229.9^a
SD2	6.6^abc	30.0^ab	13.4^a	182.1^abc
SD3	7.7^ab	31.2^ab	8.5^a	212.7^ab
SD4	3.7^cd	17.9^bc	15.7^a	103.3^cd
SD5	4.1^bcd	28.1^abc	9.8^a	114.5^bcd
SD6	1.9^d	19.4^bc	4.9^a	53.2^d
SD7	2.8^cd	8.6^c	9.8^a	78.5^cd
SED ± (24 df)	1.73	7.62	5.47	47.95
2022
Sowing Date (SD)
SD1	27.7^ab	49.6^ab	19.3^a	773.7^ab
SD2	28.8^ab	55.2^a	10.0^a	799.1^a
SD3	16.7^bc	47.9^ab	19.8^a	462.9^abc
SD4	32.9^a	53.4^ab	20.7^a	441.1^bc
SD5	12.1^cd	36.6^bc	11.5^a	334.6^c
SD6	13.8^cd	25.8^cd	6.8^a	293.9^c
SD7	3.5^d	10.3^d	9.0^a	115.6^c
SD8	8.7^d	15.9^d	8.4^a	129.2^c
SED ± (28 df)	5.45	7.78	5.66	156.61

SD1: June 18, SD 2: June 25, SD 3: July 2, SD 4: July 9, SD 5: July 16, SD 6: July 22, SD 7: July 29, SD 8: August 5, WTS: Weight of seeds per plant, 100SWT: 100 seed weight, SH%: shelling percent, SYD: Seed yield, SED: Standard Error of Difference, For the main effects, values within the same column with similar alphabets are not significantly different according to DMRT at 5% probability.

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