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On-farm trials for molybdenum requirement of groundnut

Pongsakul, P., Ratanarat, S., Parkpian, P., Sahaya, S. and Bell, R.W. (1989) On-farm trials for molybdenum requirement of groundnut. In: Proceedings of the eight Thailand National Groundnut Meeting, 3 - 5 May, Roi-Et (Thailand) pp. 334-336.


Previous survey of Mo concentrations in young fully expanded leaves (YFEL) of farmers' groundnut crop in many areas of the Northeast and East Thailand revealed that many samples contain rather low Mo concentration, indicating that those areas may be deficient in Mo for groundnut. In 1988, field trails were conducted at 3 of the low Mo locations in the Northeast. Groundnut cultivar Tainan 9 were treated with 2 rates of Mo (0 and 500 g. Mo/ha) and supplied with complete fertilizers, i.e., P, K, Mg, S, Cu, Zn and B, at planting; supplementary gypsum was supplied at pegging. At flowering, adding Mo greatly increased shoot dry matter, N content and N concentration in YFEL and also increased Mo concentration in nodules, tops and YFEL. Molybdenum application increased seed yield of groundnut at Ban Had by 19 % but not at the remaining two sites, despite the fact that all had low levels of extractable Mo in the soils. These soils release sufficient Mo from adsorbed forms to satisfy the requirement of groundnut cultivar Tainan 9 for seed dry matter yield

Publication Type: Conference Paper
Murdoch Affiliation: School of Environmental and Life Sciences
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