Page 201 -

โครงการหนังสืออิเล็กทรอนิกส์ด้านการเกษตร เฉลิมพระเกียรติพระบาทสมเด็จพระเจ้าอยู่หัว

Table 13 Total Soluble Solids of sweet corn in sandy loam (% Brix)
Chemical fertilizer Organic fertilizer
rate 2. OF rate 3. OF rate
1. OF average
(N-P 2O 5-K 2O กก./ไร่) 520 kg dry weight/rai 1,040 kg dry weight/rai
1. 0-5-10 13.4 13.1 13.0 13.2
2. 10-5-10 13.0 12.7 12.6 12.7
3. 15-5-10 12.8 13.2 13.1 13.0
4. 20-5-10 13.4 12.9 12.5 12.9
average 13.1 13.0 12.8 13.0
CV (a) = 4.4% CV (b) = 2.9%
Mean in the same column followed by the same letters are not significantly different at 5% by DMRT

Table 14 Gross returns on the production of sweet corn used fertilizers in sandy loam
Treatment Yield Yield Gross Cost of Net VCR
(kg/rai) increase return fertilizer return
(kg/rai) (Baht/rai) (Baht/rai) (Baht/rai)

1. 0-5-10 3,231.50 -
2. 10-5-10 3,076.60 -155 -1,239 966 -2,205 -1.3

3. 15-5-10 3,353.00 122 972 1,164 -192 0.8
4. 20-5-10 3,433.50 202 1,616 1,362 254 1.2
1. OF 520 kg/rai+0-5-10 -197 -1,573 570 -2,143 -2.8
3,034.90
2. OF 520 kg/rai+10-5-10 3,130.80 -101 -806 894 -1,700 -0.9
3. OF 520 kg/rai+15-5-10 3,434.00 203 1,620 1,499 121 1.1

4. OF 520 kg/rai+20-5-10 2,891.00 -341 -2,724 2,346 -5,070 -1.2
1. OF 1,040 kg/rai+0-5-10 3,486.30 255 2,038 410 1,628 5.0
2. OF 1,040 kg/rai+10-5-10 3,425.00 194 1,548 894 654 1.7

3. OF 1,040 kg/rai+15-5-10 3,190.20 -41 -330 1,499 -1,829 -0.2
4. OF 1,040 kg/rai +20-5-10 3,330.80 99 794 2,346 -1,552 0.3
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)

193