Plasma nitriding of steels 由 Aghajani, Hossein, Behrangi, Sahand

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Morphological and anatomical responses of corn (Zea mays L. IPB var. 911) seedlings to lead nitrate 由 Yllano, Orlex Baylen 1973-

Land use and groundwater quality in the upper Agno watershed (Loo and Cayapas Valleys, Northern Benguet) 由 Pascua, Chelo Supnet

Progress in nitrogen cycling studies proceedings of the 8th Nitrogen Workshop, held at the University of Ghent, 5-8 September 1994

Biological nitrogen fixation in sustainable rice farming 由 Watanabe, Iwao

Ecological study of the Bontoc rice paddy system a case of human-environment interaction 由 Omengan, Elizabeth A., Sajise, Percy E.

Nitrogen and phosphorus cycles in a Bontoc rice paddy system 由 Omengan, Elizabeth A.

Nitrogen and rice

Nitrogen and rice

Nitrogen and rice