Yields and Nitrogen Content of Corn Hybrids as Affected by Nitrogen Supply

1949 ◽  
Vol 13 (C) ◽  
pp. 303-306 ◽  
Author(s):  
Frank G. Viets ◽  
Clifford E. Domingo
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Supply ◽  
Corn Hybrids

EFFECT OF SULPHUR TREATMENTS ON YIELD AND NITROGEN AND SULPHUR CONTENT OF ALFALFA GROWN ON SULPHUR-DEFICIENT AND SULPHUR-SUFFICIENT GREY WOODED SOILS

1961 ◽  
Vol 41 (4) ◽  
pp. 709-715 ◽  
Author(s):  
R. R. Cairns ◽  
R. B. Carson
Keyword(s):  
Nitrogen Content ◽  
Relative Abundance ◽  
Nitrogen Assimilation ◽  
Calcium Sulphate ◽  
Nitrogen Supply ◽  
Physiological Functions ◽  
Root Nodulation ◽  
Main Effect ◽  
Sulphate Sulphur ◽  
Elemental Form

Sulphur applied in the elemental form, or as sodium or calcium sulphate, on Grey Wooded soils, increased yields of alfalfa on sulphur-deficient Loon River loam, but not on sulphur-sufficient Garrick loam. The quantity of sulphate-sulphur was extremely low in the alfalfa grown on untreated Loon River loam and increased markedly as a result of the application of sulphur to the soil. Although herbage from untreated areas of the sulphur-deficient soil contained a slightly higher per cent nitrogen in 1955 than that grown on the sulphur-sufficient soil, sulphur treatment increased nitrogen content and yield of nitrogen on the sulphur-deficient soil. The relative abundance of nitrogen in the herbage grown on the check areas of the deficient soil suggests that the main effect of sulphur was not on root nodulation or nitrogen supply, but rather on nitrogen assimilation and other physiological functions of the sulphur-containing compounds within the plant.

EFFECT OF NITROGEN SUPPLY ON NITROGEN CONTENT AND GROWTH RATE OF JUVENILE MACROCYSTIS PYRIFERA (PHAEOPHYTA) SPOROPHYTES1

1980 ◽  
Vol 16 (4) ◽  
pp. 577-582 ◽  
Author(s):  
Patricia A. Wheeler ◽  
Wheeler J. North
Keyword(s):  
Growth Rate ◽  
Nitrogen Content ◽  
Macrocystis Pyrifera ◽  
Nitrogen Supply

Seasonal changes in the nitrogen content of three warm-climate pasture grasses

1964 ◽  
Vol 4 (15) ◽  
pp. 336 ◽  
Author(s):  
EF Henzell ◽  
DJ Oxenham
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Fertilizer ◽  
Nitrogen Deficiency ◽  
Nitrogen Supply ◽  
High Rate ◽  
Warm Climate ◽  
Stage Of Development ◽  
Pasture Grasses ◽  
Chloris Gayana ◽  
Nitrogen Treatments

The nitrogen content of three pasture grasses was measured under irrigation at Samford, south-east Queensland, during the period February-September 1962. The grasses were Paspalum plicatulum, Sefaria sphacelata, and Chloris gayana. Two nitrogen treatments were used-nil, and a high rate. The high rate comprised frequent nitrogen fertilizer dressings in amounts chosen to match the shape of the plant growth curve. Addition of nitrogen fertilizer caused a marked increase in the nitrogen content of all parts of the plant and maintained a higher nitrogen content in mature grass samples. Flowering had relatively less effect on the nitrogen content of the grasses than nitrogen supply. Frost had very little effect on the nitrogen content of these grasses. It is suggested that warm-climate pasture grasses generally are subjected to a greater degree of nitrogen deficiency than their temperate counterparts, and that this accounts, at least in part, for their comparatively low nitrogen content. In the nil nitrogen treatment, Setaria sphacelata and Chloris gayana consistently exhibited a higher nitrogen content than Paspalum plicatulum. The differences were greatest in the leaf blades and least in the stems. The relative influences of nitrogen supply and stage of development on the nitrogen content of pasture grasses are discussed.

Environmental control of apical dominance in Phaseolus vulgaris

1973 ◽  
Vol 51 (2) ◽  
pp. 293-299 ◽  
Author(s):  
Gordon I. McIntyre
Keyword(s):  
Water Stress ◽  
Phaseolus Vulgaris ◽  
Light Intensity ◽  
Nitrogen Content ◽  
Apical Dominance ◽  
Growth Response ◽  
Environmental Control ◽  
Nitrogen Supply ◽  
Soluble Nitrogen ◽  
Bud Growth

When seedlings of Phaseolus vulgaris were grown under controlled conditions at a light intensity of 3200 ft-c, 60% relative humidity, and at nitrogen levels of 5.25, 52.5, and 210 ppm, growth of the buds at the cotyledonary node, which served as a measure of apical dominance, showed a positive correlation with the nitrogen supply and with the soluble nitrogen content of the hypocotyl. Increasing the nitrogen supply to 420 ppm caused a proportionate increase in soluble nitrogen content but no additional bud growth response. That the growth response was limited by water supply was shown by growing plants at 420 ppm nitrogen and relative humidities of 30, 60, and 90%. Each reduction in water stress, as measured by leaf relative turgidity, caused a highly significant increase in growth of the cotyledonary buds. Under high nitrogen, low water stress conditions, bud growth was markedly inhibited by reduction of the light intensity from 3200 to 700 ft-c.These results support the concept of nutrient competition as a major factor in the mechanism of apical dominance and also suggest that conflicting reports on the effect of externally applied growth-regulating substances on lateral bud inhibition may be due partly to environmentally induced differences in nutritional status of the experimental plants.

scholarly journals Calibration of Nitrogen Content of Soil with Sweet Corn

2006 ◽  
Vol 55 (1) ◽  
pp. 223-230
Author(s):  
István Buzás ◽  
E. Hoyk ◽  
I. Cserni ◽  
J. Bors-Pető
Keyword(s):  
Nitrogen Content ◽  
Dry Matter ◽  
Sweet Corn ◽  
Nitrate Nitrogen ◽  
Nitrogen Concentration ◽  
Soil Layer ◽  
Nitrogen Supply ◽  
Corn Yield ◽  
Beet Root ◽  
Matter Production

It was found that quantitative and qualitative indices of the sweet corn yield correlate with the nitrate nitrogen content of the upper soil layer (0-30 cm). As no correlation was established between the nitrate nitrogen content of the lower layers and the sweet corn, the conclusion was drawn that the quantity of sweet corn yield is determined even before its roots reach deeper down than 30 cm and the nitrogen content of the lower layers could affect the sweet corn.  Depending on the NO 3 -N content of the soil before fertilization the maximal corn ear mass achievable with fertilization may vary. In the study the same yield could not be accomplished in the case of the lowest soil nitrogen concentration (2.9 mg NO 3 -N/kg) with the highest fertilizer rate (200 kg N/ha) - but probably irrespective of any amount of fertilizer - as on the soil of 4.6 mg NO 3 -N/kg. In the case of the poorly supplied soil the fertilization curve becomes flat sooner or turns negative. The phenomenon that, regarding various soils, the maximal yield achievable on soils with good production features with fertilization is higher than in the case of soils having worse features, is well-known. That this fact is also valid in the case of the same soils was expected after calibration experiments carried out with winter oilseed rape and beet root, but it has not been proven for sweet corn as yet.  The results also showed that the grain dry matter production of sweet corn per hectare can still be enhanced with the increase in the soil's nitrogen supply, even if the corn ear does not grow.  The presented calibration curves show - in the range of 2.9-4.6 mg NO 3 -N/kg soil - how much corn ear and grain dry matter produce are expected on soils with differing nitrogen supply, distributing 0-200 kg nitrogen fertilizer in spring.

Influence of Light Regime and Leaf Nitrogen Concentration on 77k Fluorescence in Leaves of Four Tropical Grasses: No Evidence for Photoinhibition

1988 ◽  
Vol 15 (5) ◽  
pp. 669 ◽  
Author(s):  
MM Ludlow ◽  
SP Samarakoon ◽  
JR Wilson
Keyword(s):  
Nitrogen Content ◽  
Nitrogen Availability ◽  
Nitrogen Concentration ◽  
Chlorophyll Concentration ◽  
Leaf Nitrogen ◽  
Nitrogen Supply ◽  
Poor Growth ◽  
Full Sunlight ◽  
Nitrogen Treatments ◽  
Low Nitrogen

This work was undertaken to determine if the stimulation of growth associated with shading of some tropical C4 grasses growing on soils with low to moderate nitrogen availability is partly due to overcoming photoinhibition (i. e. damage caused by excessive light). Four grasses (green panic, carpet grass, buffalo grass and kikuyu) were grown in full sunlight and at 37% of full sunlight, and given a low or high nitrogen supply. Despite differences of up to twofold in leaf nitrogen and chlorophyll concentration between high and low nitrogen treatments in all four grasses, photoinhibition measured by reduction in chlorophyll fluorescence was less than 3% in leaves of low nitrogen content that developed in full sunlight. Therefore, photoinhibition is not a contributor to the poor growth of nitrogen-limited grasses in full sunlight. A second objective was to determine if low nitrogen content predisposed shade-grown leaves to photoinhibition when they were subsequently exposed to full sunlight. Green panic plants that had been given either high or low nitrogen supply and grown in 37% of full sunlight were transferred to full sunlight and the extent of photoinhibition was followed over 8 days. The amount of photoinhibition that occurred was small (<6%) compared with plants grown at either nitrogen level in full sunlight. Therefore, shade and low nitrogen content separately or in combination did not cause any appreciable photoinhibition in green panic.

Biomass production and nitrogen content of C3- and C4- grasses in pure and mixed culture with different nitrogen supply

Oecologia ◽  
1987 ◽  
Vol 71 (4) ◽  
pp. 613-617 ◽  
Author(s):  
G. Gebauer ◽  
B. Schubert ◽  
M. I. Schuhmacher ◽  
H. Rehder ◽  
H. Ziegler
Keyword(s):  
Nitrogen Content ◽  
Mixed Culture ◽  
Biomass Production ◽  
Nitrogen Supply ◽  
C4 Grasses ◽  
C3 And C4 Grasses

EFFECT OF NITROGEN SUPPLY ON NITROGEN CONTENT AND GROWTH RATE OF JUVENILE MACROCYSTIS PYRIFERA (PHAEOPHYTA) SPOROPHYTES1

1980 ◽  
Vol 16 (4) ◽  
pp. 577-582 ◽  
Author(s):  
Patricia A. Wheeler ◽  
Wheeler J. North
Keyword(s):  
Growth Rate ◽  
Nitrogen Content ◽  
Macrocystis Pyrifera ◽  
Nitrogen Supply
Sign in / Sign up

Export Citation Format

Share Document