Life Sciences Commons^™

Calotropis Or Rubber Tree (Calctropis Procera (Linn.) Dryand), G R W Meadly

Journal of the Department of Agriculture, Western Australia, Series 4

TWO SPECIES of Calotropis have been introduced to the northern parts of Western Australia. They are closely related in most respects but differ in one fundamental feature which decides their significance as undesirable plants.

Grain Sorghum In The Ord Valley : Three Crops A Year?, P J. May

Journal of the Department of Agriculture, Western Australia, Series 4

High temperatures and ample irrigation water allow grain sorghum to be grown throughout the year on the Ord River Irrigation Area, and observations in 1969-70 indicated that it may be possible in this area to produce three crops in one year from one planting, by ratoon cropping.

This article describes the technique and discusses its possibilities on the Ord.

The sorghum midge, one of the worst pests of sorghum, could well make ratoon cropping impossible, but the midge has not yet been seen in this area.

Rapeseed. 3. Varieties And Their Growth Patterns In Western Australia, M L. Poole

Journal of the Department of Agriculture, Western Australia, Series 4

RAPE belongs to the genus "Brassica" which also includes such plants as the garden cabbage, wild turnip and cultivated mustard.

The name is derived from the Latin word "rapum". meaning turnip.

The Control Of Weeds In Linseed And Rape, Geoffrey A. Pearce

Journal of the Department of Agriculture, Western Australia, Series 4

Like all crops linseed and rapeseed can suffer from weed competition.

Linseed is highly susceptible to weed competition, while rape is susceptible to the chemicals used to kill broad-leaved weeds, so both crops pose special problems.

As in other broad-acre crops, cultural methods usually provide the best means of weed control.

Management Of Dry Land Lucerne In The South-West, R Sprivulis

Journal of the Department of Agriculture, Western Australia, Series 4

MANY dry land lucerne stands have been successfully established in the dairying areas of the South-West.

With good management these can remain productive for many years; poor management can greatly reduce their productive life.

Cotton Bush (Asclepias Fruticosa L.) : Garden Plant Now A Noxious Weed, G R W Meadly

Journal of the Department of Agriculture, Western Australia, Series 4

THE cotton bush is native to South Africa but is now naturalised in most tropical and sub-tropical countries of the world. Its spread is, in no small measure, due to being grown frequently as a garden subject.