Dyfyniad APA

(1996). Roots and nitrogen in cropping systems of the Semi- Arid tropics. Tsukuba, Ibaraki, Japan: Japan International Research Center for Agricultural Sciences.

Dyfyniad Arddull Chicago

Roots and Nitrogen in Cropping Systems of the Semi- Arid Tropics. Tsukuba, Ibaraki, Japan: Japan International Research Center for Agricultural Sciences, 1996.

Dyfyniad MLA

Roots and Nitrogen in Cropping Systems of the Semi- Arid Tropics. Tsukuba, Ibaraki, Japan: Japan International Research Center for Agricultural Sciences, 1996.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.