Effect of soil surface moisture levels on the formation and development of groundnut pods
1989
Tagsina Sansayavichai | Chanta Chiangnangarm (Khon Kaen Field Crops Research Center, Khon Kaen (Thailand))
Dry soil surface may be a problem for peg penetration, thus, may affect groundnut yield. To examine this hypothesis, a greenhouse study was conducted at Khon Kaen in 1988 using groundnut cultivar Tainan 9 grown in pots of 20 cm diameter and 75 cm height containing Korat soils. The treatments imposed were no stress (control); water with held at flowering (30-40 DAE), at pegging (45-55 DAE), and at pod development (60-70 DAE); and podding zone drought at flowering (30-40 DAE), at pegging (45-55 DAE), and at pod development (60-70 DAE). The results indicated that 10 days of dry soil surface at any growth stage did not affect crop yield. In fact. podding zone drought at flowering stage even gave a yield increase as the number of flowers increased. Moisture deficit throughout the soil profile caused a significant yield reduction, and drought stress at pod development stage showed the greatest yield reduction.
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