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

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Table 4

Effects of sowing date on number of days to flowering, physiological maturity, height at primary raceme, and height at maturity and stem diameter of castor in 2021 and 2022.

Sowing Date (SD)	ND50FL	NDPM	HTPR (cm)	HTPM (cm)	STD (cm)
2021
Sowing date (SD)
SD1	82^b	147^a	181.8^a	274.8^a	13.8^a
SD2	78^b	141^a	161.9^ab	235.1^ab	10.3^ab
SD3	79^b	145^a	143.2^b	197.5^bc	8.3^b
SD4	79^b	147^a	140.1^b	194.9^bc	10.7^ab
SD5	81^b	137^a	151.8^ab	188.6^bc	8.8^b
SD6	92^a	141^a	128.2^bc	156.3^cd	8.5^b
SD7	95^a	136^a	104.5^c	120.8^d	6.3^b
SED ± (24 df)	2.17	4.73	14.98	21.42	1.95
2022
Sowing Date (SD)
SD1	93.5^ab	148.5^a	127.2^ab	205.9^ab	22.7^a
SD2	86.2^bc	142.7^ab	151.5^a	202.5^ab	19.0^b
SD3	96.8^ab	139.8^ab	124.7^ab	166.2^bc	17.2^bc
SD4	78.3^c	132.7^b	148.9^a	214.6^a	14.2^cd
SD5	86.5^bc	133.2^b	107.0^bc	145.0^cd	12.1^de
SD6	99.8^a	138.0^b	91.5^cd	119.5^de	10.7^de
SD7	95.2^ab	140.0^ab	76.7^d	101.1^e	9.3^e
SD8	100.0^a	132.3^b	71.2^d	87.7^e	9.5^e
SED ± (28 df)	5.40	4.44	14.00	19.27	1.72

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, ND50FL: Number of days to 50% flowering, NDPM: Number of days to physiological flowering, HTPR: Height at primary raceme, HTPM: Height at physiological maturity, STD: Stem diameter, 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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