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Full-Text Articles in Life Sciences
Timing Of Nitrogen Fertilizer Application For Cereals, M G. Mason
Timing Of Nitrogen Fertilizer Application For Cereals, M G. Mason
Division of Plant Research : Technical Report Series
Results are presented for 206 trials carried out between 1959 and 1990, investigating the effect of time of application of nitrogen fertilizers on cereal grain yields. This set of data is the basis of recommendations made for timing of nitrogen fertilizer application for cereals in Western Australia. Attention is drawn to the variability of results obtained in different seasons and situations and the time of leaching rains.
Long Term Effects Of Direct Drilling And Conventional Cultivation On The Distribution Of Nutrients And Organic C In Soils Of South Western Australia, P F. White, R K. Belford, A D. Robson, N D. Delroy, R J. Jarvis
Long Term Effects Of Direct Drilling And Conventional Cultivation On The Distribution Of Nutrients And Organic C In Soils Of South Western Australia, P F. White, R K. Belford, A D. Robson, N D. Delroy, R J. Jarvis
Division of Plant Research : Technical Report Series
This experiment was part of a long term tillage trial designed to examine the effect of various tillage systems on the yield of wheat on a range of agricultural soils in Western Australia. A subset of results from the main experiment is presented here.This report describes the distribution of extractable P, extractable K, total N, organic C, and pH at 6 depths in the soil from 6 locations; Wongan Hills, Merredin (H) (calcic, red-brown earth), Avondale, Merredin (L) (acid, yellow earth), Esperance and Mt Barker. Three tillage systems (conventional cultivation, direct drilled with a combine, direct drilled with a triple …
Evalution Of Grain Legumes For Wheatbelt Rotations In Western Australia 1986 -1987, G H. Walton
Evalution Of Grain Legumes For Wheatbelt Rotations In Western Australia 1986 -1987, G H. Walton
Division of Plant Research : Technical Report Series
Conclusions about the geographic and climatic limitations to the economic production of some pulse species in Western Australia cannot be too definite after only two years of gathering data. The yield results confirm the superior adaptation of field pea and narrow-leaf lupin over the faba bean, chickpea, narbonne bean and lentil. In 1987, a relationship was found within specific crop cultivars / accessions, between seed yield and the spring (September + October) rainfall. It is expected that soil type will influence the yield response through variations in moisture retention capacity, fertility and root penetration. Any relationship between yield and environmental …
Disease And Insect Resistance Screening Of The National Subterranean Clover Collection, D J. Gillespie, M J. Barbetti
Disease And Insect Resistance Screening Of The National Subterranean Clover Collection, D J. Gillespie, M J. Barbetti
Division of Plant Research : Technical Report Series
This project commenced in May 1981 primarily to identify sources of resistance to clover scorch (Kabatiella caulivora), root rots (Pythium, Fusarium and Rhizoctonia spp.), and bluegreen aphid (Acyrthospihon kondoi) in the National Subterranean Clover Collection. Screening for resistance to red legged earthmite (Halotydeus destructor) was initiated part way through the project. Since commencement approximately 5,250 introductions and crossbred clover shave been tested for resistance to clover scorch, 420 for resistance to rootrots, 690 for resistance to blue green aphid and 160 for resistance to redlegged earth mite (R.L.E.M.). A large number of clovers possessing resistance to clover scorch have been …
Factors Affecting Frost Damage To Wheat In Western Australia, S P. Loss
Factors Affecting Frost Damage To Wheat In Western Australia, S P. Loss
Division of Plant Research : Technical Report Series
It may at first seem strange that precious research funds are being channelled into a project concerned with frost damage in a country where high temperatures and moisture stress limit the growth of plants for a large portion of the year. But cereal crops are only grown in the temperate zones of the continent during winter and spring when they may be exposed to low diurnal temperatures. In many areas cold damage is irregular and rare,however it limits yields not only by causing actual damage but also by restricting the most effective period for flowering. For muck of the Australian …
The Esperance Rotation Trial, Effect Of Rotations On Crop Yields And Soil Fertility, I C. Rowland
The Esperance Rotation Trial, Effect Of Rotations On Crop Yields And Soil Fertility, I C. Rowland
Division of Plant Research : Technical Report Series
This report sets out and summarises data from the Esperance rotation trial.This long-term trial, situated on the Esperance Downs Research Station, looks at various aspects of rotations based on subterranean clover pasture with cereals or sweet lupins as a crop. Data included are yields of the crops both grain and dry matter at anthesis or mid-pod fill also nitrogen content at these two times; pasture production and composition in Spring; clover seed production; weed counts in the crop; soil measurements of total soil nitrogen,organic carbon, mineral nitrogen, pH and extractable potassium are done at thestart of each season.The trial, on …
Climate Of The Ord River Irrigation Area Western Australia, Implications For Crop Production, Rob J. Delane
Climate Of The Ord River Irrigation Area Western Australia, Implications For Crop Production, Rob J. Delane
Division of Plant Research : Technical Report Series
Management should be aimed at early planting to take advantage of higher soil and air temperatures, promoting rapid canopy closure, high final dry matter production and earlier calendar maturity. This will aid in attaining high yields, good grain quality, and low risk of harvesting delays or crop damage due to rain. However, early dry season planting is hindered by late maturation of some wet season crops, and excessive weed growth and slow soil drying following the wet season. The development (or adaption) of improved crop rotations, improved land utilisation and reduced tillage techniques will likely bring forward dry season planting …
Harvesting Methods In South Coastal, High Rainfall Crops, Richard Snowball
Harvesting Methods In South Coastal, High Rainfall Crops, Richard Snowball
Division of Plant Research : Technical Report Series
Results of trials carried out in south-western Australia over the past three years have shown that swathing or windrowing cereal and legume crops can result in significant advantages to growers.Swathing barley, wheat and oat crops at Mt. Barker resulted in large yield advantages over direct harvesting of standing crops. This was a result of overcoming shedding losses in the standing crop caused by strong wind and rain. Grain quality of barley and oats was not significantly affected by swathing, however, the quality of swathed wheat was sometimes worse than direct harvested grain if the harvest was delayed.Swathing cereals at Newdegate …
A Review Of Deep Tillage Research In Western Australia, M W. Perry
A Review Of Deep Tillage Research In Western Australia, M W. Perry
Division of Plant Research : Technical Report Series
A history of deep tillage in Western Australia, R.J. Jarvis. Biology of root growth in cereals, M.W. Perry. Physics of soil compaction and root grow thin compacted media, A.P. Hamblin. Effects of deep tillage on root growth and wateruse of wheat and lupins, D. Tennant. Nutrition or water - why the response to ripping, W.J. Bowden. Crop response to deep tillage, R.J. Jarvis. Response of crops and pastures to deep tillage, C. Henderson. Soil compaction, deep tillage and root disease, J. Wilson. Deep tillage in farming systems: timing of deep tillage and interactions with rotation and conventional tillage practice, J. …
Nitrogen Fertiliser Use For Cereal Hay Production, M G. Mason
Nitrogen Fertiliser Use For Cereal Hay Production, M G. Mason
Division of Plant Research : Technical Report Series
Aspects of the effect of nitrogen fertilizers on cereal hay production in twenty-one experiments carried out over eight seasons were investigated.Areas investigated include the effects of rate and time of application of nitrogen fertilizer, sowing rate, date of sowing, crop species and variety and time of cutting on cereal hay yield, nitrogen content and digestibility.Response to nitrogen fertilizers in hay and grain production varied but profitable responses were more common, and optimum rates were higher for hay than for grain. Average optimum rates for hay were 51 to 88 kg nitrogenha-1 and for grain 0 to 44 kg nitrogen ha-1. …