Evaluation of Some Soil Properties Affecting Sugarcane Yield and CCS of Khon Kaen 3 (KK3) and LK 92-11 Varieties in Eastern Thailand
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Abstract
The evaluation of the effect of some soil factors on Commercial Cane Sugar (CCS) and the yield of sugarcane varieties Khon Kaen 3 and LK92-11 was conducted by testing these varieties in 15 planting areas across three provinces: Chonburi, Sa Kaeo, and Chachoengsao. Soil properties in each area were analyzed, including pH, electrical conductivity (EC), organic matter (OM), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg). CCS and yield per rai of sugarcane were measured after 12 months of growth. The variance analysis of multiple linear regression between the soil analysis and CCS as well as sugarcane yield was also performed. The results showed that the factors influencing the CCS of Khon Kaen 3 and LK92-11 sugarcane varieties grown in Chonburi, Sa Kaeo, and Chachoengsao were electrical conductivity, phosphorus, and organic matter content in the soil with the coefficient of determination (R2) for the Khon Kaen 3 variety was 0.64, while for the LK92-11 variety, it was 0.76. Factors influencing the yield of Khon Kaen 3 included magnesium and phosphorus, with an R2 = 0.51, while for LK92-11, the factors were electrical conductivity and phosphorus, with an R2 = 0.62. The increased yield was found to be positively correlated with the CCS values. Increasing organic matter in the soil by alternating organic fertilizers with chemical fertilizers is recommended as a method for maintaining electrical conductivity levels, increasing organic matter in the soil, and improving the availability of phosphorus in the soil.
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