Mathematics for the practical engineer. Engineers' study course from Power; a mathematical manual for the power plant engineer. Contains simplified lessons for home-study in fractions, ratio and proportion, percentage, involution and evolution, square root, cube root, formulas, logarithms, mensuration and plane trigonometry,

Mode of access: Internet.

Frequencies of nodulation response alleles, Rj₂ and Rj₄, in soybean plant introduction and breeding lines /

Chiefly tables.

Plants reported resistant or tolerant to root knot nematode infestation /

Contribution from Bureau of Plant Industry.