CSIRO Publishing
0004-9409
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Các bài báo tiêu biểu
The analysis of adaptation in a plant-breeding programmeThe adaptation of barley varieties was studied by the use of grain yields of a randomly chosen group of 277 varieties from a world collection, grown in replicated trials for several seasons at three sites in South Australia. For each variety a linear regression of yield on the mean yield of all varieties for each site and season was computed to measure variety adaptation. In these calculat... ...
Tập 14 Số 6 - Trang 742 - 1963
Soil carbon fractions based on their degree of oxidation, and the development of a carbon management index for agricultural systemsIncreasing population pressure is increasing the demand on agricultural systems in many parts of the world and this has often led to the degradation of the soil resource. Soil carbon (C) is a major determinant of sustainability of agricultural systems and changes can occur in both total and active, or labile, C pools. A procedure is presented to determine the degree of lability of soil C. ... ...
Tập 46 Số 7 - Trang 1459 - 1995
Drought resistance, water-use efficiency, and yield potential—are they compatible, dissonant, or mutually exclusive?This presentation is a concept review paper dealing with a central dilemma in understanding, designing, and acting upon crop plant improvement programs for drought conditions. The association among yield potential (YP), drought resistance (DR), and water-use efficiency (WUE) is often misunderstood, which in turn can lead to conceptual oversight and wrong decisions in implementing breeding ... ...
Tập 56 Số 11 - Trang 1159 - 2005
The use of plant wax alkanes as marker substances in studies of the nutrition of herbivores: a reviewThis review discusses the potential use of plant wax components, especially n-alkanes, as markers for estimating herbage intake, estimating the botanical composition of consumed herbage and studying digesta kinetics. Previous approaches to making these measurements are discussed briefly. Attention is drawn to the fact that current methods for estimating intake do not adequately allow for d... ...
Tập 42 Số 6 - Trang 913 - 1991
Supplementation of Acacia mearnsii tannins decreases methanogenesis and urinary nitrogen in forage-fed sheepThe objective of this experiment was to assess the effects of a partial replacement of ryegrass (Lolium perenne) by red clover (Trifolium pratense) or alfalfa (Medicago sativa) supplemented with 0 or 41 g Acacia mearnsii extract (containing 0.615 g/g condensed tannins)/kg dietary dry matter on nitrogen turnover and methane release by sheep, using the respiration chamber technique. Across a... ...
Tập 56 Số 9 - Trang 961 - 2005
Ascochyta blight of chickpea (Cicer arietinum L.): a review of biology, pathogenicity, and disease management
Ascochyta blight (AB), caused by Ascochyta rabiei is a major disease of chickpea (Cicer arietinum L.), especially in areas where cool, cloudy, and humid weather persists during the crop season. Several epidemics of AB causing complete yield loss have been reported. The fungus mainly survives between seasons through infected seed and in infected crop debris. Despite extensive pathological... ...
Tập 56 Số 4 - Trang 317 - 2005
Drought resistance in spring wheat cultivars. III.* Yield associations with morpho-physiological traits This paper describes associations between yield performance under drought and morpho-physiological traits, determined both under drought and non-drought conditions, for a large set of diverse cultivars of bread wheat (Triticum aestivum L.), durum wheat (T. turgidum L.), triticale (X Tritosecale Wittmack) and barley (Hordeum vulgare L). Performance under drought was considered in terms of ... ...
Tập 30 Số 6 - Trang 1001 - 1979
The effect of high temperature on kernel dimensions and the type and occurrence of kernel damage in riceRice (Oryza sativa L. cv. Calrose) growing at 27/22�C was either transferred to day/night temperatures ranging from 24/19 to 39/34�C 7days after heading and held at these temperatures until maturity, or transferred to a temperature of 36/31�C for 8 day periods at regular intervals commencing from heading. Kernel dimensions were measured directly and the types of kernel damage at maturity w... ...
Tập 42 Số 3 - Trang 485 - 1991
Reducing rumen methane emissions through elimination of rumen protozoa
Methanogens living on and within rumen ciliate protozoa may be responsible for
up to 37% of the rumen methane emissions. In the absence of protozoa,
rumen methane emissions are reduced by an average of 13% but this
varies with diet. Decreased methane emissions from the protozoa-free rumen may
be a consequence of: (1) reduced ruminal dry matter
digestion; (2) a decreased methanogen populat... ...
Tập 50 Số 8 - Trang 1321 - 1999
Influence of temperature on oil content and composition of sunflower seedThe influence of temperature on the oil content and composition of sunflower was studied on plants grown under field conditions and in a range of controlled environments. Traces of oil were detectable in cypsela (seed) almost immediately after pollination. Much of this appeared to be present in the hull (pericarp), which is well developed at this stage. Significant production of oil commen... ...
Tập 29 Số 6 - Trang 1203 - 1978