This visit was made to study recent research. The topics of most interest were crop nutrition, mycorrhizae, growth regulators, row spacing and breeding.

The main aim of this trip was to accept an invitation from the British Society of Chemical Industry to deliver a paper at their 'Resistance 91' international symposium.

The initial phase of .the project was devoted to the selection and testing of analytical techniques for assessing total nitrogen and leaching losses, and gaseous losses of nitrogen by ammonia volatilization and denitr

The first Queensland soil management training workshop was held in July 1991 at Dalby. Funding came from the Cotton Research and Development Corporation and the National Soil Conservation Program.

The objective of this project was to look at economic optimisation within the SIRATAC framework.

This project was initiated under the name "CS66L - SIRATAC Plus configuration and testing". However, the Siratac Plus project proved a failure and all development was abandoned in 1990.

I was invited to speak at the conference to give a paper at one of the sessions.

During August 1990, in company with Dr Norm Thomson, Mr Reid visited a number of research institution and companies form California to Mississippi.

A survey form asking the cost of weed control, the major weed problems and the herbicides used was sent to fifty two cotton growers from the seven major cotton areas of New South Wales.

To measure the effect of biotic factors (host crop, body size) and abiotic factors (temperature, humidity) on reproductive development, fecundity and longevity of adult Heliothis punctigera and H.

OBJECTIVES (i) To evaluate the reliability of current SIR.A TAC sampling procedures and conversion equations relating proportion infestation to mean number of insects per plant.

This project involved the purchase of equipment to measure the surface water inputs and outputs of two commercial scale cotton fields.

The main aim of this project was to develop a low-cost multispectral airborne video imaging system (referred to as MAVIS) for detecting and monitoring spatial and temporal variations in the vigour of irrigated cotton

Aims: (i) to quantify the contribution of alternative host crops to the dynamics of Heliothis on cotton using an elemental analysis technique developed in a previous project.

To quantify movement of Heliothis adults Into cotton crops from local and distant source regions.

This project was concerned with the transfer of cotton fibre testing from the Division of Wool Research, Geelong Victoria to the Cotton Research Unit at Narrabri Agricultural Research Station (NARS).

A 20 saw gin was bought for $13,000 from the USA. It was installed and fitted with a motor in time to be used in the 1991 harvest It operated satisfactorily throughout the 1991 season.

Aims 1. Promote awareness of the importance of soil management 2. Collate existing research results and practical knowledge of the management of irrigated cracking clays. 3.

Aims: *Use data which relates mite numbers to yield loss in order to derive and test action thresholds.

The use of pyrethroid insecticides on Helicoverpa armigera susceptible crops has been restricted to only 6 weeks each summer since 1983, when resistance to pyrethroids was diagnosed.