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Research Article
Alleviation of Soil Compaction Problem for Growing Cassava on a Typic Paleustult, Northeast Thailand

Yuttakarn Kaewkamthong, Suphicha Thanachit, Somchai Anusontpornperm and Wanpen Wiriyakitnateekul

Asian Journal of Crop Science, 2014, 6(4), 334-344.

Abstract

The combination effect of tillage and soil conditioner on the alleviation of soil compaction problem for growing cassava on a Typic Paleustult was conducted from May 2009 to March 2011. Deep tillage with soil conditioner applied had no effect on increased cassava yield in both years. Deep tillage practice together with the application of chicken manure gave the highest yield in the first year (19.88 t ha-1) and with gypsum (23.13 t ha-1) in the second year but with no statistical difference in both years. Both soil conditioners significantly induced the plant to have the lowest starch percentage of 21.7 and 24.6%, respectively. Ground limestone, gypsum and no amendments with and without deep tillage significantly gave the highest starch percentage in the first year while in the second year ground limestone, chicken manure and no amendment with conventional tillage had the same effect. Chicken manure highly significantly gave the highest above ground biomass by increasing stem, leaves and branches weight in the second year. There was no change of soil properties as the soil still containing very low amounts of organic matter and plant nutrient even though soil conditioner had been applied for two consecutive years. Chicken manure was the most efficient soil conditioner in increasing soil pH and enhancing plant nutrients availability while gypsum was the most effective source for alleviating soil compaction problem particularly more evidently at the depth between 20-30 cm. Nevertheless, soil compaction still remained after two-year application as shown by soil physical properties measured.

ASCI-ID: 4-155

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