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ห้องสมุดกรมพัฒนาที่ดิน

ABSTRACT

Soil improvement using various organic fertilizers for organic sweet corn production was
conducted in farmer field at Ban Khlong Malako, Tambon Sa Khwan Muang Srakaeo, Sa Kaeo
province during 2019 - 2020.The experimental design was Randomized Complete Block Design
(RCBD) with 8 treatments 3 replication. There were : Farmer practice (compost at the rate of
2,000 kilogram per rai), Cow manure, Compost, High quality organic fertilizer, Various types of

organic fertilizers and green manure with planting Crotalaria juncea between of rows. Rate of
organic fertilizer use for increase organic matter in the soil 3 percent
The result showed that : High quality organic fertilizer (at the rate of 1,736.0 kilogram
per rai), Sweet corn gave the highest average yield of 2,642.4 kilogram per rai, Cow manure
and Compost gave the yields of 2,251.5 and 2,290.5 kilogram per rai. While used of green
manure with planting Crotalaria juncea between of rows gave the lowest yield of 1,698.7
kilogram per rai. Net income showed that : Cow manure (at the rate of 2,287.0 kilogram per rai)

gave the highest average net income of 24,213.60 baht per rai. Farmer practice (compost at the
rate of 2,000 kilogram per rai) gave the average net income of 20,031.50 baht per rai. Compost
and High quality organic fertilizer gave the average net income of 14,512.50 and 13,448.60 baht
per rai. High quality organic fertilizer applying with Planting Crotalaria juncea between of rows
gave the lowest net income of 5,427.0 baht per rai. Soils chemical fertility analysis compared
before and after studied showed that the average amount of phosphorus, potassium and
magnesium were increased. While organic matter, calcium were decreased and soil acidity
was slightly changed.