Productivity of 5 soil series in corn hybrid planting
1999
Satit Areerak (Department of Agriculture, Bangkok (Thailand). Nakhon Sawan Field Crops Research Center)
Corn productivity of 5 soil series including Takhli, Thab Kwang, Wang Hai, Samo Thod and Lop Buri was studied. Seven corn hybrids and one open-pollinated variety were tested for grain yield and agronomic traits under the soil series in 1997 early and late rainy season at Nakhon Sawan Field Crops Research Center. The experimental design used was a randomized complete block design with 4 replications. For the experiment conducted in early rainy season, an interaction between the series of soil and varieties of corn was observed in grain yield. There was a highly significant difference between grain yield of corn under differents soil series. The soil of Takhli series produced the highest corn grain yield of 1,230 kg/rai, whereas Thab Kwang, Wang Hai and Samo Thod series produced 1,093, 934 and 822 kg/rai, respectively. The lowest grain yield was observed in Lop Buri series. In comparison between all combinations of different soil series and corn varieties, the combination of Takhli series and a corn hybrid CG 5445 produced the highest grain yield of 1,410 kg/rai. Different soil series were observed to be compatible with different corn hybrids. Takhli series were suitable for CG 5445, CPDK 888, Cargill 922, Pioneer 3013 and SW 3601 and Samo Thod series were suitable for Pioneer 3013, SW 3601 and NSX 9210, Wang Hai series were compatible with CPDK 888, Pacific 300, Pioneer 3013, SW 3601 and NSX 9210 where Thab Kwang series were compatible with CPDK 888, Pioneer 3013 and SW 3601. For the experiment conducted in late rainy season, there was no interaction between the soil series and corn varieties in grain yield. However, a highly significant difference between grain yield of corn under different soil series was observed. Corn grain yields of Takhli, Lop Buri, Wang Hai, Thab Kwang and Samo Thod were 1,195, 1,180, 1,060, 1,036 and 755 kg/rai, respectively. There was also a highly significant difference between the tested corn varieties. The highest mean grain yield of 1,231 kg/rai was observed from CG 5445 in comparison to 935 kg/rai of the check variety NSX 9210.
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