Response of Inga rice to nitrogen fertilizer rate and timing in New South Wales

1982 ◽  
Vol 22 (115) ◽  
pp. 62 ◽  
Author(s):  
DP Heenan ◽  
LG Lewin
Keyword(s):  
Nitrogen Fertilizer ◽  
Agricultural Research ◽  
New South ◽  
New South Wales ◽  
Research Centre ◽  
Yield Response ◽  
Fertilizer Rate ◽  
South Wales ◽  
Panicle Number ◽  
Nitrogen Fertilizer Rate

Two experiments were done at the Yanco Agricultural Research Centre, New South Wales, in 1978-79 and 1979-80 to measure the response of long grain rice, cv. Inga, to rates of nitrogen applied at two different times. The highest yields were recorded when the nitrogen was applied at panicle initiation. Increasing the rate from 100 to 200 kg N/ha at panicle initiation had no effect on grain yield. When the nitrogen was applied earlier, just before permanent water, yields were highest at 50 kg N/ha and declined at the highest rates (150 and 200 kg N/ha). This negative yield response was mainly due to a drop in the percentage of filled florets, and occurred despite an increase in panicle number.

Growth, grain yield and water use of rice grown under restricted water supply in New South Wales

1984 ◽  
Vol 24 (124) ◽  
pp. 104 ◽  
Author(s):  
DP Heenan ◽  
JA Thompson
Keyword(s):  
Grain Yield ◽  
Water Use ◽  
Agricultural Research ◽  
New South ◽  
New South Wales ◽  
Research Centre ◽  
Total Water ◽  
Leaf Stage ◽  
South Wales ◽  
Matter Production

Growth, grain yield and water use by Calrose rice grown under three flood irrigation regimes and four nitrogen fertilizer treatments were examined at Yanco Agricultural Research Centre, New South Wales, to determine the response of rice under a restricted supply of water. Growth under weekly irrigations before panicle initiation severely restricted dry matter production. When nitrogen (90 kg N/ha) was split with 45 kg N/ha at the three-leaf stage and 45 kg N/ha at panicle initiation followed by permanent flood at panicle initiation, yield was 8.67 t/ha. This was equivalent to yields obtained from conventional practice where all fertilizer was applied at the three-leaf stage followed immediately by permanent flood. Delaying permanent flood until panicle initiation resulted in approximately 23% saving in total water use. Weekly irrigation throughout the season produced low vegetative growth and grain yields.

Varieties of tomatoes for mechanical harvesting on the Murrumbidgee Irrigation Area of NSW

1967 ◽  
Vol 7 (27) ◽  
pp. 380
Author(s):  
JB Sumeghy ◽  
HC Kirton
Keyword(s):  
Nitrogen Fertilizer ◽  
New South ◽  
New South Wales ◽  
Planting Density ◽  
Plant Spacing ◽  
Irrigation Area ◽  
South Wales ◽  
Time Of Harvest

To test the potential suitability of ten tomato varieties in the Murrumbidgee Irrigation Area of New South Wales to mechanical harvesting, the yields from 'once-over' harvests were compared with the yields from a harvest consisting of four pickings at weekly intervals. In a second experiment the effect of plant spacing, time of harvest, and side-dressing with nitrogen fertilizer were studied for the most promising varieties from the first experiment. The varieties Roma 884, VF145-22-8, and VF145 held their crops for prolonged periods without deterioration and so showed potential for mechanical harvesting. High planting density gave the highest yields from a single picking, and later picking and nitrogen side-dressing also increased yield.

Production of two species and two interspecific hybrids of phalaris under irrigation in south-west New South Wales

1980 ◽  
Vol 20 (103) ◽  
pp. 181 ◽  
Author(s):  
JW Read ◽  
JV Lovett
Keyword(s):  
White Clover ◽  
Nitrogen Fertilizer ◽  
Interspecific Hybrids ◽  
New South ◽  
New South Wales ◽  
Paspalum Dilatatum ◽  
Suitable Alternative ◽  
South West ◽  
South Wales ◽  
High Production

Two phalaris hybrids (Siro 11 46 and allopolyploid) and the parent lines (Phalaris aquatica and P. arundinacea) were compared in monoculture with nitrogen fertilizer and in a mixed sward with white clover and lucerne. The experiment was flood irrigated and the effects of defoliating the swards at intervals of 21, 42 and 84 days were measured. The hybrid (Siro 11 46) was the most productive genotype at all defoliation intervals. Eighty one % of its annual yield occurred in spring and summer. This production imbalance renders Siro 11 46 unsuitable as the foundation of a pasture for high production throughout the year. The mixed sward produced more than the monoculture sward when defoliated every 21 or 42 days and there was increased production associated with increased defoliation interval. The monoculture sward was more productive than the mixed sward at an 84 day defoliation interval. The yield of Siro 1146 + white clover was 2.25 t ha-1 per 84 days, compared with a mean yield of phalaris + white clover of 1.78 t ha-1 per 84 days for the three other genotypes. The results indicate that Siro 11 46 grown with white clover and defoliated approximately every 42 days would be a suitable alternative pasture to Paspalum dilatatum and white clover in the two-pasture system used in irrigation areas of southern New South Wales. The problems of low acceptability and suspected toxicity of Siro 1146 are discussed.

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