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โครงการหนังสืออิเล็กทรอนิกส์ด้านการเกษตร เฉลิมพระเกียรติพระบาทสมเด็จพระเจ้าอยู่หัว

Table 9 Total Soluble Solids of sweet corn in clay loam (% Brix)
Organic fertilizer
Chemical Fertilizer 2. OF rate 3. OF rate average
rate
(N-P 2O 5-K 2O กก./ไร่) 1. No OF 520 kg dry 1,040 kg dry
weight/rai weight/rai
1. 0-5-5 16.2 16.1 16.5 16.2 a
2. 10-5-5 16.2 16.2 15.8 16.1 ab
3. 15-5-5 15.4 15.5 14.9 15.3 b
4. 20-5-5 15.1 14.7 14.7 14.8 b
average 15.7 15.6 15.5 15.6
CV (a) = 4.6% CV (b) = 5.4%
Mean in the same column followed by the same letters are not significantly different at 5% by DMRT

Table 10 Gross returns on the production of sweet corn used fertilizers in clay loam
Treatment Yield Yield Gross Cost of Net VCR
(kg/rai) increase return fertilizer return
(kg/rai) (Baht/rai) (Baht/rai) (Baht/rai)

1. 0-5-5 1,486.30 -
2. 10-5-5 2,407.80 922 7,372 822 6,550 8.97

3. 15-5-5 3,040.60 1,554 12,434 1,020 11,414 12.19
4. 20-5-5 3,218.00 1,732 13,854 1,218 12,636 11.37
1. OF 520 kg/rai+0-5-5 -246 -1,969 2,376 -4,345 -0.83
1,240.20
2. OF 520 kg/rai+10-5-5 2,670.50 1,184 9,474 2,772 6,702 3.42
3. OF 520 kg/rai+15-5-5 3,068.80 1,583 12,660 2,970 9,690 4.26

4. OF 520 kg/rai+20-5-5 2,993.30 1,507 12,056 3,168 8,888 3.81
1. OF 1,040 kg/rai+0-5-5 1,708.80 223 1,780 4,326 -2,546 0.41
2. OF 1,040 kg/rai+10-5-5 983 7,861 4,722 3,139 1.66
2,468.90
3. OF 1,040 kg/rai+15-5-5 3,065.60 1,579 12,634 4,920 7,714 2.57
4. OF 1,040 kg/rai +20-5-5 3,405.30 1,919 15,352 5,118 10,234 3.00

Fertilizers price: 46-0-0 (18 baht/kg) 0-46-0 (24 baht/kg) 0-0-60 (18 baht/kg) and organic fertilizer (3 baht/kg)
yield price (8 baht/kg)

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