Itthiphon khong pun lae pui phosphate thi mi to khwam pen prayot khong phosphate naidin lae phonphalit khong khao phan kokho 23 thi pluk nai din Rangsit kot chat lae Ongkharak.
1985
Asdaporn Kaewprommal
The treatments receiving no phosphate fertilizer did not give grain yield of rice. Phosphate application only gave higher grain yield (65.37 g./pot) in Onkharak soil than in Rangsit very acid soil (33.70 g/pot). Treatments 4 and 6 (application of phosphate with lime to raise soil pH to 4.5 and 5.5) produced comparable grain yields (84.11 and 89.70 g/pot). But in Rangsit very acid soil, treatment 6 gave higher grain yield (89.86 g/pot) than treatment 4(72.45 g/pot). Treatments receiving phosphate fertilizer showed apparent increases in available phosphorus in both soils.
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