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ห้องสมุดกรมพัฒนาที่ดิน

2

Abstract

Research, testing and collecting data on land development in the land
development project area of the Chaipattana Foundation, Baan Kreen Kratin Noen Khi

Lek Subdistrict, Lat Yao District, Nakhon Sawan Province Conducted from October
2019 to September 2020 to study physical and chemical properties of soils from land
development. Including the survival rate growth and biomass of vetiver grass Songkla-

3 variety.Which were planted in the land development project area. The experimental
design was randomized complete block design (RCBD) 4 treatments, 5 replications,

including treatment 1, control, no compost no polymer.Treatment 2: Improve soil
with compost at the rate of 2 tons per rai (according to the recommendations of soil

improvement for field crops by Super LDD 1 compost of the Land Development
Department). Treatment 3, apply the polymer at the rate of 0.5 liters per 10 meters

row of vetiver grass. Treatment 4: Improve soil with compost in combination with
polymers as 1 ton per rai of compost and applying the polymer at the rate of 0.25
liters per 10 meters row of vetiver grass.The results showed that. Method 4 had the

highest survival rate of vetiver grass and had the highest 7 month tillering rate.Soil
improvement can increase vetiver grass tillering rate compared to control. Compost

and adding a polymer to the bottom of the pit resulted in an increase in the biomass
of vetiver grass.