Showing papers in "Field Crops Research in 1984"

TL;DR: Genotypes which were relatively insensitive to photoperiod and vernalization, and hence early, were best throughout, and especially at the hot lower sites, while late genotypes gave a poor relative performance at the lowland site, where yield and kernel number m −2 showed negative phenotypic correlations with days to anthesis.

TL;DR: By moving plants between growth chambers with high and moderate night temperatures, it was demonstrated that the stage of floral development most sensitive to high night temperature occurred 5–7 days before anthesis, which corresponds with the stage just after the release of the tetrads from the microscope mother cell sac.

TL;DR: In this paper, the effect of soil moisture and growth duration on root development and plant water-use in early and late isogenic lines of sorghum (Sorghum bicolor L. Moench) were grown in a root observation field installation at Temple, Texas in 1976.

TL;DR: Declining yields at IRRI are thought to be largely due to boron toxicity, zinc deficiency, increased disease and insect pressure and lodging, however, their causes at the other sites are not understood.

TL;DR: Management of N application to sunflower crops should ensure an adequate supply just before floret initiation to obtain large seed numbers, according to the results of glasshouse experiments with cultivar Hysun 30.

TL;DR: It is suggested that the response of two short season soybean lines acclimated to conditions in the saturated soils and showed improved nodulation and subsequent growth rates reflects a delay in the initiation of the orderly process of senescence normally observed in soybeans.

TL;DR: In this paper, the effects of reduced soil moisture on the nitrogenase activity of soybean nodules to changes in leaf water status, stomatal activity, nodule water content and apparent canopy carbon exchange during an imposed drying cycle.

TL;DR: In this paper, various spatial arrangements of maize were tried in attempt to improve grain yield of a soybean [ Glycine max (L.) Merr.] intercrop, sown in the same row, without substantially reducing the maize yield.

TL;DR: In this paper, the total N content of soils from long-term fertility plots in two sites in the Philippines was measured by Kjeldahl analysis, and it appears that the total soil N at each site did not decrease during the cropping period.

TL;DR: In this paper, the influence of day or night soil temperature on the growth and yield of potato in the hot tropics was measured by spreading a reflectant or clear polyethylene sheeting, in a number of day/night combinations, over the soil surface.

TL;DR: Fifty varieties of rice grown in the Philippines this century were grouped chronologically for comparison in both glasshouse and field experiments at Los Banos, revealing marked changes in growth habit, daylength response and inflorescence characteristics.

TL;DR: Coefficients were higher in the canopies under heavy shade, indicating an adaptation in canopy structure to reduced light environment, and reduced harvest index of plants of all ages.

TL;DR: Soaking in water or solutions of ascorbic acid, CaCl2, KH2PO4, NaCl, succinic acid and ZnSO4 followed by drying of seeds of sunflower (Helianthus annuus L), improved field emergence and early growth of seedlings.

TL;DR: The results emphasise the benefits in crop N management of adequate fertilizer application before floret initiation to allow the maximum development of all organs, particularly root mass and floret numbers.

TL;DR: In this article, the physiological basis of increased seed yield in short-season soybeans (Glycine max (L.) Merr.) as row widths are narrowed and plant densities are increased was analyzed.

TL;DR: Most of the glossy lines are in the durra group but some are from the taxonomic groups guinea, caudatum, and bicolor, many being extremely late or photoperiod-sensitive and very tall.

TL;DR: The experimental results indicate that cassava can develop fibrous root systems rapidly and extensively and under limited carbohydrate supply shoot was a stronger sink than both fibrous roots and tubers.

TL;DR: In this paper, the root distribution along the soil profile is known to be affected by irrigation frequency, and the root number of crown roots is controlled by limiting the number of root roots per plant.

TL;DR: Variation in number of pods was associated with variation in the number of reproductive nodes per plant, and levels of flower abscission were not excessive in any of the environments, and plants at 33/19°C air temperature exhibited less percent flowerAbscission than plants at 27/19% air temperature.

TL;DR: Maize yield was highest in the maize stover and poorest in the Indigofera spicata, and good maize yield was obtained in the live mulch in which weed competition was minimized by the legume cover.

TL;DR: In this paper, the effects of ridge and flat planting of yam, with and without surface mulch, on soil moisture and temperature regimes, root and shoot development, tuber yield and yield components were investigated for an Ultisol near Port Hartcourt in southeast Nigeria.

TL;DR: It was found that, for sowing date, there is an optimum period which depends on the rainfall pattern and this period is mid-November to mid-December, and the 16-cm row spacing was found to be the most suitable.

TL;DR: Changes in photosynthate source-sink relationships during the development of rape growing under field conditions were investigated using 14CO2, explaining many of the apparent inconsistencies in the literature regarding the role of shoot parts in carbon nourishment of the seeds.

TL;DR: Sorghum and cowpea exhibited contrasting levels of dehydration avoidance when grown as sole-crops, but intercropping did not cause any substantial change in the water relations of either species.

TL;DR: Examination of leaf area display and light interception patterns in the crop canopy in relation to yield production sites of two varieties of short-season indeterminate soybeans found carbohydrates were suppled to lower regions of the plant, from these leaves, where most of the yield was found to occur.

TL;DR: The ration of genetic variances in intercrop to sole crop, and the high positive genotypic correlations between cropping systems indicated that selection based on the mean of both systems would result in improved performance in both environments.

TL;DR: In this article, the authors studied the contribution of individual branches of short-season freely branching semi-erect desi genotype grown on a sandy loam soil, of neutral pH, at Merredin in the southwestern Australian cereal belt.

TL;DR: The interaction of nitrogen fertilization and irrigation level confirms that a single limiting factor would prevent growth responses to other environmental factors and shows that oilseed rape growth was particularly responsive to nitrogen treatment.