Nitrogen fertilizer needs of first‐year small grain forages following Alfalfa

2020 ◽  
Author(s):  
Collin A. Pound ◽  
Matt A. Yost ◽  
J. Earl Creech ◽  
Grant E. Cardon ◽  
Jody Gale ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
First Year

scholarly journals Effect of slow release fertilizers on container-grown woody plants

2008 ◽  
Vol 34 (No. 1) ◽  
pp. 35-41 ◽  
Author(s):  
F. Šrámek ◽  
M. Dubský
Keyword(s):  
Nitrogen Fertilizer ◽  
Woody Plants ◽  
Slow Release ◽  
First Year ◽  
Nutrient Source ◽  
Thuja Occidentalis ◽  
Slow Release Fertilizers ◽  
Second Year ◽  
Soluble Fertilizer ◽  
Pyracantha Coccinea

Slow-Release Fertilizers (SRF) Silvamix Forte and Silvagen were tested in two-year experiments with container-grown woody plants (<i>Pyracantha coccinea</i>, <i>Thuja occidentalis</i>). Several fertilizing systems were compared: preplant application of SRF into substrate as the sole nutrient source for a two-year period, preplant application of SRF and soluble fertilizer (PG Mix), and preplant application of SRF and soluble fertilizer together with additional fertilizing by solution of nitrogen fertilizer during both growing periods. A system with controlled-release fertilizer (CRF) Osmocote 5&minus;6 was chosen as a control variant; it was incorporated into substrate before planting in the first year and top-dressed in the second year. CRF Plantacote 6M (mixed into substrate before planting and top-dressed in the second year) and Osmocote 16&minus;18 applied only before planting were tested, too. The experiments showed that SRF Silvamix Forte and Silvagen give results comparable with CFR provided that they were incorporated together with soluble ferti-lizer dose and plants were fertilized by solution of nitrogen fertilizer during both growing periods.

Comparison of four wheat cultivars for yield and protein response to nitrogen fertilizer

1976 ◽  
Vol 16 (80) ◽  
pp. 407 ◽  
Author(s):  
JR Syme ◽  
J Mackenzie ◽  
WM Strong
Keyword(s):  
Nitrogen Fertilizer ◽  
Protein Level ◽  
Field Experiments ◽  
First Year ◽  
Wheat Cultivars ◽  
Land Area ◽  
High Nitrogen ◽  
One Year ◽  
White Grain ◽  
Protein Response

Four wheat cultivars were compared for grain yield and grain protein response to nitrogen fertilizer at rates up to 135 and 336 kg N ha-1, in two field experiments, All varieties showed large responses to nitrogen in both years. The Mexican semi-dwarf WW15 and its white-grain derivative, Condor, yielded more than the standard cultivars Timgalen or Gatcher. Semi dwarf cultivars were found to respond significantly more to nitrogen than either Timgalen or Gatcher in the first year of these trials. Protein percentage of the grain was depressed by low rates of nitrogen in one year but increassd at higher rates. Gatcher and Condor had similar protein percentages; WW15 had the lowest and Timgalen the highest. Only Timgalen with high nitrogen reached a protein level for premium payment in the first year. In the second, all cultivars when fertilized qualified for similar premium payments per unit of land area. A simplified economic analysis showed that it was more profitable to grow and to fertilize the higher-yielding cultivars.

Effect of tillage on nitrogen response in corn (Zea mays L.) after established alfalfa (Medicago sativa L.)

1993 ◽  
Vol 73 (1) ◽  
pp. 73-81 ◽  
Author(s):  
G. K. S. Aflakpui ◽  
T. J. Vyn ◽  
M. R. Hall ◽  
G. W. Anderson ◽  
C. J. Swanton
Keyword(s):  
Nitrogen Fertilizer ◽  
Nitrogen Availability ◽  
Conventional Tillage ◽  
Growth And Yield ◽  
First Year ◽  
Tillage Systems ◽  
Nitrogen Rate ◽  
Nitrogen Response ◽  
No Till ◽  
Second Year

The effect of tillage and added nitrogen fertilizer on first- and second-year corn after an established alfalfa stand was investigated in field studies near Woodstock, Ontario, Five rates of nitrogen fertilizer, ranging from 0 to 160 kg ha−1, were evaluated to determine their influence on corn growth and yield in both no-till and conventional tillage systems in the first and second years of corn following alfalfa. In the first year of corn after alfalfa, grain yield and harvest index were significantly lower with no-till than with conventional tillage only in 1988. First-year grain yields were independent of nitrogen fertilizer rates in both 1988 and 1989. There was no tillage by nitrogen rate interaction in either year indicating that additional nitrogen fertilizer was not required to achieve optimum corn yields with no-till relative to conventional tillage. Yields of second-year corn increased with nitrogen rate in both 1989 and 1990. Tillage systems had no apparent influence on nitrogen availability to corn grown after an established alfalfa stand. Key words: Tillage, alfalfa, nitrogen

scholarly journals Leaching of nitrogen in barley, grass ley and fallow lysimeters

1993 ◽  
Vol 2 (4) ◽  
pp. 281-291 ◽  
Author(s):  
Toivo Yläranta ◽  
Jaana Uusi-Kämppä ◽  
Antti Jaakkola
Keyword(s):  
Ammonium Nitrate ◽  
Nitrogen Fertilizer ◽  
Spring Barley ◽  
Peat Soil ◽  
Growing Season ◽  
First Year ◽  
Water Drainage ◽  
Lysimeter Experiment ◽  
Grass Ley

The leaching of nitrogen from fallow, fertilized and unfertilized spring barley, and grass ley was studied in a 4-year lysimeter experiment tcarried out on clay, silt and sand soils, and Carex peat. The experimental factors included also irrigation and treatments where the nitrogen fertilizer was applied in the first year as 15N-labelled ammonium nitrate. During four years, 41-66% of the nitrogen applied in the first growing season was recovered in plants harvested. Most of it, 91-96%, was taken up in the year applied. Mostly, the water drainage was lowest in silt and sand soils. The irrigation increased clearly the leaching of nitrogen almost in all treatments. Crops decreased the drainage of water through the lysimeters and the leaching of nitrogen, grass more than barley. The effects of plants and irrigation were similar in all soils, but most marked in sand. The largest amount of nitrogen was leached in irrigated, fallowed sand, 440 kg ha-1, during four years. The majority of the leached nitrogen was nitrate. Only in peat soil a significant amount of nitrogen was leached in some another form. The leaching of 15N-labelled fertilizer during four years was highest in sand, 2.3 kg ha 1 of N or 2.3% of the nitrogen applied in the first experimental year.

Liveweight and wool growth of sheep in response to the quantity and botanical composition of annual pasture induced by nitrogen fertilizer and stocking treatments

1972 ◽  
Vol 23 (6) ◽  
pp. 1101 ◽  
Author(s):  
HL Davies ◽  
EAN Greenwood
Keyword(s):  
Ammonium Sulphate ◽  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Trifolium Subterraneum ◽  
First Year ◽  
Botanical Composition ◽  
Stocking Rate ◽  
Nitrogen Concentrations ◽  
Sheep Production

For five years, three rates of ammonium sulphate (N0, N1, and N3: 0, 280, and 840 kg/ha/year) were applied as a split dressing to ,a pasture of Bromus mollis L. and Trifolium subterraneum L. which was continuously grazed by wethers set-stocked at 8.6 and 12.4 sheep/ha. The N0 treatment produced clover dominance, N1 a mixed sward, and N3 grass dominance. The higher stocking rate increased the proportion of clover in the mixed sward. These differences in botanical composition produced three significant effects on the relation between liveweight gain and quantity of green pasture on offer. An increase in the proportion of clover in the sward increased: (1) the quantity of herbage dry matter on offer required for liveweight maintenance; (2) the maximum rate of liveweight gain; (3) the quantity of dry matter on offer at the point of 90% maximum liveweight gain. Regressions of those three parameters on botanical composition accounted for over 90% of the variance. The effects of treatments on liveweight at other times of the year are also described. In the first year of grazing ammonium sulphate increased liveweight, apparently because of increased pasture on offer after emergence. In subsequent years the effect of ammonium sulphate was reversed: liveweight was reduced, and this was associated with lower nitrogen concentrations in, and lower quantities of, herbage produced. Wool elongation rates were greatest in spring and lowest prior to the germinating rains in autumn. Elongation rate was unaffected by stocking rate and only slightly affected by ammonium sulphate. From January to April, greatest elongation occurred on the grass-dominant N3 paddocks; from May to December greatest elongation occurred on the clover-dominant N0 paddocks. The implications of the role of nitrogen fertilizer in relation to sheep production in the winter rainfall regions of Australia are discussed.

Response of maize to trash burning and nitrogen fertilizer in a newly opened secondary forest

1989 ◽  
Vol 113 (2) ◽  
pp. 207-210 ◽  
Author(s):  
G. O. Iremiren
Keyword(s):  
Nitrogen Fertilizer ◽  
Secondary Forest ◽  
N Fertilizer ◽  
Growth And Yield ◽  
First Year

SUMMARYThe growth and yield of maize grown on an unploughed newly opened secondary forest in Nigeria in 1985–87 was studied. In each year, trash was either removed or burnt in situ and each of these treatments was given N fertilizer or none. In the first year, only N fertilizer increased yields. In the second and third years, yields were increased by N fertilizer and by trash burning. Trash burning consistently increased the amount of P in the soil.

scholarly journals Cultivar Fruiting and Vegetative Response to Nitrogen Fertilizer in Cranberry

1999 ◽  
Vol 124 (1) ◽  
pp. 90-93 ◽  
Author(s):  
Joan R. Davenport ◽  
Nicholi Vorsa
Keyword(s):  
Nitrogen Fertilizer ◽  
Genetic Gain ◽  
Vegetative Growth ◽  
Fruit Yield ◽  
First Year ◽  
Future Studies ◽  
Nitrogen Levels ◽  
Significant Yield ◽  
N Rates ◽  
Nitrogen Rates

Cranberry (Vaccinium macrocarpon Ait.) has the opportunity to partition resources into sexual and/or asexual (stolons) modes of reproduction. Nitrogen status has been shown to impact the degree of stoloniferous growth. To determine whether there is a genotypic response to varying nitrogen levels, six hybrid and four native cultivars were treated with three annual rates of nitrogen fertilizer (17, 34, or 67 kg·ha-1) for 4 years. Fruit yield was determined each year and asexual vegetative growth (stolons) weight was removed and measured in all but the first year of the experiment. Cultivars exhibited different patterns of yield and stolon weight response over the three nitrogen rates. Not all cultivars exhibited significant yield decreases at the high N levels. Vegetative growth (stolon weight) generally increased with increasing N, however, not all cultivars responded similarly over three N rates. Partitioning between yield and stolon production favored fruit yield at the lower N rates in three of the four native cultivars studied (`Cropper', `Early Black', and `Howes'). Yield over N rates was more stable for four of the six hybrid cultivars, which may be the result of greater heterozygosity in hybrids than natives, and/or genetic gain from one breeding and selection cycle, offering increased tolerance to nitrogen stress. This study indicates that genetic variation exists for yield, yield stability, and stolon production relative to nitrogen level, and that genetic gain in cranberry is possible for these traits. Future studies involving cranberry physiology and nutrition should consider the genotypes used.

Changes in role perceptions by first-year dental students

1977 ◽  
Vol 41 (8) ◽  
pp. 507-510 ◽  
Author(s):  
AC Rosen ◽  
M Marcus ◽  
N Johnson
Keyword(s):  
Dental Students ◽  
First Year ◽  
Role Perceptions

Relationship of stress and performance among first-year dental students

1986 ◽  
Vol 50 (5) ◽  
pp. 264-267 ◽  
Author(s):  
GH Westerman ◽  
TG Grandy ◽  
JV Lupo ◽  
RE Mitchell
Keyword(s):  
Dental Students ◽  
First Year ◽  
And Performance ◽  
Relationship Of
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