Measuring nitrogen losses from lowland rice using bulk aerodynamic and nitrogen-15 balance methods
De Datta, S.K. (International Rice Research Institute (IRRI), Manila, Philippines), Trevitt, A.C.F, Freney, J.R, Obcemea, W.N, Real, J.G, Simpson, J.R
Published in Soil Science Society of America journal (01.07.1989)
Published in Soil Science Society of America journal (01.07.1989)
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Journal Article
Direct measurement of ammonia and denitrification fluxes from urea applied to rice
De Datta, S.K. (International Rice Research Inst., Manila, Philippines), Buresh, R.J, Samson, M.I, Obcemea, W.N, Real, J.G
Published in Soil Science Society of America journal (01.03.1991)
Published in Soil Science Society of America journal (01.03.1991)
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Journal Article
Ammonia volatilization losses from flooded rice soils [Nitrogen use efficiency]
Mikkelsen, D.S, De Datta, S.K, Obcemea, W.N
Published in Soil Science Society of America journal (01.09.1978)
Published in Soil Science Society of America journal (01.09.1978)
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Journal Article
Inorganic and organic fertilizer for lowland rice: effect on soil available nitrogen and grain yield
Garcia, F.D, Obcemea, W.N, Cruz, R.T. (Philippine Rice Research Inst., Maligaya, Munoz, Nueva Ecija (Philippines))
Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
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Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
Journal Article
Influence of organic and inorganic fertilizers on yield of irrigated lowland rice
Garcia, F.D, Obcemea, W.N, Cruz, R.T. (Philippine Rice Research Inst., Maligaya, Munoz 3119, Nueva Ecija (Philippines))
Published in Philippine Journal of Crop Science (Philippines) (01.05.1996)
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Published in Philippine Journal of Crop Science (Philippines) (01.05.1996)
Journal Article
Establishment method for rainfed rice and its weed control
Obcemea W.N, Javier E.F, Garcia F.D, Casimero M.C, Aragon M.L, Dumaol I.D, Pascual F, Obien S.R
Published in Philippine Journal of Crop Science (1996)
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Published in Philippine Journal of Crop Science (1996)
Journal Article
Effect of the combined use of organic and inorganic fertilizer on yield, pests and diseases of lowland rice
Obcemea, W.N, Garcia, F.D, Sagun, V.G, Rillon, G.S, Justo, H.P. (Philippine Rice Research Inst., Maligaya, Munoz, 3119 Nueva Ecija (Philippines))
Published in Philippine Journal of Crop Science (Philippines) (01.04.1998)
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Published in Philippine Journal of Crop Science (Philippines) (01.04.1998)
Journal Article
Dry-seeding establishment method for rainfed rice
Obcemea, W.N, Garcia, F.D, Javier, E.F, Casimero, M.C, Dumaoal, I.D, Pascual, F, Aragon, M.L, Obien, S.R. (Philippine Rice Research Inst., Maligaya, Munoz, Nueva Ecija 3119 (Philippines))
Published in Philippine Agricultural Scientist (Philippines) (01.07.1999)
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Published in Philippine Agricultural Scientist (Philippines) (01.07.1999)
Journal Article
Effects of urea-N fertilizers on floodwater ammoniacal-N and rice yield
Corton, T.M, Obcemea, W.N, De Leon, J.P, Suralta, R.R. (Philippine Rice Research Inst., Munoz, Nueva Ecija 3119 (Philippines))
Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
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Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
Journal Article
Effects of urea - N fertilizers on floodwater ammoniacal-N and rice yield
Corton, T.M, Obcemea, W.N, de Leon, J.P, Suralta, R.R. (Philippine Rice Research Inst., Maligaya, Munoz, Nueva Ecija (Philippines))
Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
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Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
Journal Article
Documentation of visible symptoms of zinc deficiency as affected by inorganic and organic fertilizers
Obcemea, W.N, Corton, T.M, Suralta, R.R, de Leon, J.P. (Philippine Rice Research Inst., Munoz, Nueva Ecija 3119 (Philippines))
Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
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Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
Journal Article
Farmers' visual guide in identifying zinc deficiency in rice
Obcemea, W.N, Corton, T.M, Suralta, R.R, De Leon, J.P. (Philippine Rice Research Inst., Maligaya, Munoz, Nueva Ecija (Philippines))
Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
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Published in Philippine Journal of Crop Science (Philippines) (01.05.1997)
Journal Article
Effect of water depth on nitrogen use efficiency and nitrogen-15 balance in lowland rice
De Datta, S.K, Obcemea, W.N, Chen, R.Y, Calabio, J.C, Evangelista, R.C
Published in Agronomy journal (01.03.1987)
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Published in Agronomy journal (01.03.1987)
Journal Article
Too much water or too little water: how it affects urea-N efficiency for tropical crops
Obcemea, W.N, Saffigna, P.G, Wood, A.W, Freney, J.R. (Philippine Rice Research Inst., Munoz 3119, Nueva Ecija (Philippines))
Published in Philippine Journal of Crop Science (Philippines) (01.05.1996)
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Published in Philippine Journal of Crop Science (Philippines) (01.05.1996)
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