Regional evaluation of wheat genotypes for grain protein level in the central west of New South Wales

1981 ◽  
Vol 21 (108) ◽  
pp. 68
Author(s):  
E Seif ◽  
LN Balaam
Keyword(s):  
Protein Level ◽  
New South ◽  
New South Wales ◽  
Heritability Estimate ◽  
Grain Protein ◽  
Wheat Protein ◽  
Wheat Genotypes ◽  
First Order ◽  
Laboratory Error ◽  
South Wales

The analysis of wheat protein data from ten homozygous genotypes grown at six locations in 4 years gave a heritability estimate of 50%, and another of 65% from a sub-set of genotypes of similar maturity. The first-order interactions, genotype x year and genotype x location, were small and nonsignificant. An examination of the variance of a genotype mean indicated that selection in regional testing programs could be based on data from as few as three trials. Laboratory error represented a large proportion of this variance, thus more than one laboratory determination will be necessary.

Effect of sowing rate on grain yield, kernel weight, and grain protein percentage of barley (Hordeum vulgare L.) in northern New South Wales

1992 ◽  
Vol 32 (4) ◽  
pp. 465 ◽  
Author(s):  
AD Doyle ◽  
RW Kingston
Keyword(s):  
Hordeum Vulgare ◽  
Grain Yield ◽  
Field Experiments ◽  
New South ◽  
New South Wales ◽  
Kernel Weight ◽  
Grain Protein ◽  
Hordeum Vulgare L ◽  
Protein Percentage ◽  
South Wales

The effect of sowing rate (10-110 kg/ha) on the grain yield of barley (Hordeum vulgare L.) was determined from a total of 20 field experiments conducted in northern New South Wales from 1983 to 1986. Effects of sowing rate on kernel weight and grain protein percentage were also determined from 12 experiments conducted in 1985 and 1986. Two barley varieties were tested each year. In all years fallow plus winter rainfall was equal to or greater than average. Grain yield increased with higher sowing rates in most experiments, with the response curve reaching a plateau above 60-70 kg/ha. For 13 of the 40 variety x year combinations, grain yield fell at the highest sowing rates. Only in an experiment where lodging increased substantially with higher sowing rates was there a reduction in yield at a sowing rate of 60 kg/ha. The average sowing rate for which 5 kg grain was produced per kg of seed sown was 63 kg/ha. Grain protein percentage usually fell, and kernel weight invariably fell, with increasing sowing rate. Increasing sowing rates from the normal commercial rate of 35 kg/ha to a rate of 60 kg/ha typically increased grain yields by 100-400 kg/ha, decreased kernel weight by 0.4-2.0 mg, and decreased grain protein by up to 0.5 percentage points. In no case was the grain weight reduced to below malting specifications. It was concluded that sowing rates for barley in northern New South Wales should be increased to about 60 kg/ha.

Some factors affecting the extraction of soil 'available' phosphate

Soil Research ◽  
1978 ◽  
Vol 16 (3) ◽  
pp. 355
Author(s):  
GD Batten
Keyword(s):  
Soil Solution ◽  
New South ◽  
New South Wales ◽  
Large Vessel ◽  
Soil Tests ◽  
Factors Affecting ◽  
Laboratory Error ◽  
South Wales ◽  
Available Phosphate

Twenty soils from southern New South Wales were analysed for acid extractable phosphate in 1971, and again in 1977 when it was found that an increase had occurred. These same samples were also analysed using reciprocating shakers with different distances of travel. More phosphate was extracted when a shaker with a greater distance of travel was used and when more soil, but at the same soil : solution ratio, was placed in a large vessel. It is suggested that such variations in technique contribute to inter-laboratory error in soil tests for phosphate.

A multivariate procedure for classifying environments according to their interaction with genotypes

1979 ◽  
Vol 30 (6) ◽  
pp. 1021 ◽  
Author(s):  
E Seif ◽  
JC Evans ◽  
LN Balaam
Keyword(s):  
New South ◽  
New South Wales ◽  
Interaction Effects ◽  
Canonical Variate ◽  
Canonical Variates Analysis ◽  
Wheat Genotypes ◽  
South Wales ◽  
Canonical Variates ◽  
Location Interaction

Canonical variates analysis was adapted to the problem of classifying environments according to their interactions with wheat genotypes, and was used to subdivide the Central West of New South Wales into uniform sub-regions. The method takes into account any fluctuations from year to year in the genotype x location interaction effects, and has several other advantages over the procedures previously used. Most of the variability among locations was represented by one canonical variate and was related to an east-westerly trend. It is suggested that the Central West be divided into two sub-regions, the eastern slopes and the western plains, for the purpose of varietal evaluations and recommendations.

The plant nutrient status of granite soils from the Bendemeer area of New South Wales

1966 ◽  
Vol 6 (20) ◽  
pp. 17 ◽  
Author(s):  
F McMullen
Keyword(s):  
Dry Matter ◽  
New South ◽  
Soil Phosphorus ◽  
New South Wales ◽  
Trifolium Subterraneum ◽  
Nutrient Status ◽  
Calcium Sulphate ◽  
Plant Nutrient ◽  
First Order ◽  
South Wales

A factorial glasshouse pot trial was used to examine the supply of phosphorus, boron, zinc, copper, cobalt, magnesium, molybdenum, potassium, and manganese, to the Dwalganup strain of Trifolium subterraneum L. growing in virgin granite soils from Bendemeer, New South Wales. Calcium sulphate was applied as a basal nutrient. Significant dry matter responses were obtained on all four virgin soils to the application of phosphorus, molybdenum, and potassium; to copper on two soils; and to boron and cobalt on one soil. Phosphorus was so deficient that responses to other plant nutrients did not occur in its absence. On all soils, significant first order interactions were recorded between phosphorus and other deficient elements. In addition, significant interactions were recorded between molybdenum and magnesium, copper and molybdenum, boron and molybdenum, copper and cobalt, and potassium and molybdenum.

Wheat crop surveys in southern New South Wales. 1. Some factors influencing grain protein

1965 ◽  
Vol 5 (19) ◽  
pp. 487 ◽  
Author(s):  
AC Taylor
Keyword(s):  
New South ◽  
New South Wales ◽  
Grain Protein Content ◽  
Wheat Crop ◽  
Grain Protein ◽  
Regression Analyses ◽  
Average Increase ◽  
Sowing Time ◽  
Factors Influencing ◽  
South Wales

Three surveys in southern New South Wales assessed the importance of a number of agronomic factors on grain protein content. Grain from clover ley areas had an average of 1.3 per cent more protein than grain from crops without a clover ley background. Multiple regression analyses of the 1961 and 1963 data from clover ley crops showed that each year of ley was associated with an average increase of 0.14 per cent protein. Each week's delay of sowing beyond April 1, was associated with an average increase of 0.17 per cent grain protein. Amount of superphosphate applied to ley, intensity of cropping, and length of fallow had no effect or inconsistent effects on grain protein. With crops after natural leys only sowing time had a consistent effect on grain protein. The regression was the same as for crops with a clover ley background.

Deterministic compartmental model for the eastern king prawn (Penaeus plebejus) fishery in New South Wales

1995 ◽  
Vol 46 (5) ◽  
pp. 793 ◽  
Author(s):  
GNG Gordon ◽  
NL Andrew ◽  
SS Montgomery
Keyword(s):  
Compartmental Model ◽  
New South ◽  
New South Wales ◽  
Eastern Coast ◽  
Migration Patterns ◽  
First Order ◽  
The North ◽  
Estimated Parameters ◽  
South Wales ◽  
Yield Per Recruit

Eastern king prawns (Penaeus plebejus) migrate north from estuaries along the eastern coast of New South Wales and are subject to fishing during this migration. A constant-parameter deterministic compartmental model of the northward migration is described in which the compartments are zones of constant latitudinal width. Assumptions made for each zone are similar to those made for the Baranov catch equation, in which the population decays exponentially through constant instantaneous rates of natural mortality, fishing mortality and emigration. However, in addition to these assumptions, emigration from each zone is assumed to replenish the population in the next zone to the north. This results in the dynamics of the population being described by a system of constant-coefficient linear first-order differential equations. The solutions of this system and of equations for cumulative catch are given in a form that allows the model to be generalized to other migration patterns as a multi- zone analogue of the Baranov catch equation. A discretized form of the model with a restricted parameterization is used to analyse tag-return data from four tag releases. Estimated parameters are used in a yield-per-recruit analysis of prawns recruited to the ocean fishery from Botany Bay.

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