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

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

Land use and groundwater quality in the upper Agno watershed (Loo and Cayapas Valleys, Northern Benguet) gan 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 gan Watanabe, Iwao

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

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

Nitrogen and rice

Nitrogen and rice

Nitrogen and rice