1989 Final Reports

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Physical Degredation of clay soils in relation to management for cotton production

Kirby, J.M. (1989-06-30)

AIMS 1. To determine the mechanical and physical consequences of land preparation and harvesting on the soils and to relate these effects to soil water content. 2.

Development of a rapid mass screening technique for the selection of cotton plant antibiotic resistance to Helicoverpa spp.

Twine, P.H. (1989-06-30)

ABSTRACT: When searchinq for an ideal mass screening technique for cotton plant antibiotic resistance to Helicoverpa spp., a 48 hour feeding on squares using final instar larvae bioassay was found to be the most suita

Irrigated cotton strain and cultivar testing in Queensland

Mann, G.D. (1989-06-30)

The objective of this project was to evaluate preliminary and advanced breeding selections from the Narrabri and Biloela programs at up to five locations in Queensland.

Improved Water Scheduling and crop nutrition in cotton

Bourne, J.F. (1989-06-30)

This project utilises information from Emerald and other irrigation districts in the State to develop a scheduling system, WATERSCHED, as part of a Cotton Management Decision Program. OBJECTIVES 1.

Effect of Tillage Practice in Nitrogen Fertiliser Strategy and Soil Structure

Constable, Greg (1989-06-30)

Summary of results: This project was needed to assess the N fertiliser requirements of cotton under new tillage systems currently being adopted, particularly since the structure of cracking clay soils is prone to degr