EFFECT OF NITROGEN AND PHOSPHORUS FERTILIZATION ON WILD OATS AND SPRING WHEAT

1963 ◽  
Vol 43 (1) ◽  
pp. 64-69 ◽  
Author(s):  
J. J. Sexsmith ◽  
G. C. Russell
Keyword(s):  
Seed Yield ◽  
Spring Wheat ◽  
Nitrogen Fertilizer ◽  
High Rate ◽  
Phosphorus Fertilization ◽  
Wild Oat ◽  
Measurable Effect ◽  
Nitrogen And Phosphorus ◽  
Wild Oats ◽  
Loam Soil

Spring wheat, with fertilizer applied in the drill rows, was grown in wild-oat-infested stubble on a Shallow Lethbride loam soil for 4 years, Phosphorus had no measurable effect on the height, straw weight, seed yield, or number of wild-oat plants. In contrast, nitrogen increased the number of seed-bearing stems, plant height, straw weight, and seed yield, but did not change the wild-oat stand. Wheat yields were increased by nitrogen and further increased by the addition of phosphorus at the rate of 20 pounds of P2O5 per acre in 3 of the 4 years. Measured bushel weight of the wheat increased with nitrogen fertilizer additions and was further increased by phosphorus except at the high rate of both materials. Fertilizer applications, under conditions similar to those encountered in this test, may be useful for increasing wheat production, but only at the expense of producing increased quantities of wild-oat seed.

EFFECTS OF DIFFERENT SEEDING MACHINES ON SPRING WHEAT PRODUCTION UNDER VARIOUS CONDITIONS OF STUBBLE RESIDUE AND SOIL COMPACTION IN NO-TILL ROTATIONS

1977 ◽  
Vol 57 (2) ◽  
pp. 81-91 ◽  
Author(s):  
C. W. LINDWALL ◽  
D. T. ANDERSON
Keyword(s):  
Spring Wheat ◽  
Soil Compaction ◽  
Soil Layer ◽  
Triticum Aestivum L ◽  
Soil Bulk Density ◽  
Wild Oats ◽  
No Till ◽  
Seed Placement ◽  
Loam Soil ◽  
Chemical Fallow

The effectiveness of several commercial seeders and an experimental triple-disc press drill was assessed on a silt loam soil at Lethbridge over a 7-yr period on fields receiving chemical weed control instead of tillage between crops. The double- and triple-disc press drills generally failed to penetrate untilled surfaces adequately when soil bulk density in the upper 5 cm exceeded about 1.2 g/cm3 or when the quantity of surface residue exceeded about 3,700 kg/ha. Hoe openers penetrated the soil but failed to clear heavy residues when stubble and straw lengths were excessive (> 25 cm). In 2 of the 7 yr, yields of spring wheat (Triticum aestivum L.) on small plots seeded with the double- and triple-disc drills were superior to those seeded with the wide-spaced hoe drill (1,159 vs. 721 kg/ha in 1969, and 667 vs. 573 kg/ha in 1973). Yield differences were primarily due to wild oats (Avena fatua L.), which germinated because of the tillage action of hoe openers, in ridge areas between rows and which, despite the use of herbicides, seriously reduced yields from wide-spaced rows (23 and 36 cm). In the other years, yields were similar for all seeding methods. On 0.4-ha chemical fallow fields, yields were up to 51% lower within sprayer wheel traffic areas (bulk densities of 1.2 g/cm3 or greater in the 0- to 5-cm soil layer) because of shallow seed placement when double-disc drills were used but not when hoe drills were used.

Nutrient uptake and use efficiency of onion seed yield as influenced by nitrogen and phosphorus fertilization

2020 ◽  
Vol 43 (9) ◽  
pp. 1229-1247
Author(s):  
Demis Fikre Limeneh ◽  
Hussien Mohammed Beshir ◽  
Fekadu Gebretensay Mengistu
Keyword(s):  
Nutrient Uptake ◽  
Seed Yield ◽  
Phosphorus Fertilization ◽  
Nitrogen And Phosphorus ◽  
Onion Seed ◽  
Use Efficiency

scholarly journals Effect of Nitrogen and Phosphorus Fertilization on Growth in a Sweetgum Plantation in Southeastern Arkansas

1998 ◽  
Vol 22 (3) ◽  
pp. 163-168
Author(s):  
Yanfei Guo ◽  
Brian R. Lockhart ◽  
Tim T. Ku
Keyword(s):  
Nitrogen Fertilization ◽  
Volume Growth ◽  
Stem Volume ◽  
Phosphorus Fertilization ◽  
Nitrogen And Phosphorus ◽  
Crown Width ◽  
Loam Soil ◽  
The Mean ◽  
Crown Closure ◽  
Nitrogen Phosphorus

Abstract Effects of nitrogen and phosphorus fertilization (nitrogen only, phosphorus only, nitrogen + phosphorus, and no fertilizer) on the growth of a sweetgum (Liquidambar styraciflua L.) plantation were tested in a poorly drained Henry silt loam soil in southeastern Arkansas. The plantation was fertilized when 4 yr old. Nitrogen fertilization increased height, dbh, and stem volume growth 1 yr after the application, and the mean height, dbh, and stem volume were significantly greater for the trees with nitrogen fertilization than for the trees without nitrogen fertilization through 10 yr. Phosphorus alone did not affect tree growth. However, height growth was improved by the combination of nitrogen and phosphorus eight yr after fertilization. Nitrogen also increased crown width and length through the first 4 yr, but crown width and length were similar among treatments after crown closure occurred by 13 yr. South. J. Appl. For. 22(3):163-168.

Frequency of post-emergence harrowing effects wild oat control and spring wheat yield

1995 ◽  
Vol 75 (1) ◽  
pp. 163-165 ◽  
Author(s):  
Kenneth J. Kirkland
Keyword(s):  
Spring Wheat ◽  
Wheat Yield ◽  
Triticum Aestivum L ◽  
Organic Production ◽  
Cultural Control ◽  
Wild Oat ◽  
Fresh Weight ◽  
Wild Oats ◽  
Alternative Weed Control ◽  
The One

Crops grown by organic producers or others choosing not to use herbicides require alternative weed control methods. In a 3-yr study at Scott, Saskatchewan, several harrowing frequencies were applied to emerged wild oats infesting spring wheat. Two passes with diamond tooth harrows at the one- to two-leaf stage of wild oats reduced panicle density and fresh weight in 2 of 3 yr. Multiple harrowings reduced wheat culms, fresh weight, and yield in 2 of the 3 yr. In 1992, four harrowings reduced wheat culms and yield, but had no effect on wild oat. In 1993, two harrowings reduced wild oat panicles and fresh weight, but had no effect on wheat culms and fresh weight, suggesting that moisture conditions at and immediately following harrowing have a differential effect on the ability of the two species to recover. Key words:Avena fatua L., Triticum aestivum L., cultural control, organic production

THE EFFECT OF NITROGEN AND PHOSPHORUS FERTILIZERS ON THE YIELD AND PROTEIN CONTENT OF SPRING WHEAT GROWN ON STUBBLE FIELDS IN SOUTHERN ALBERTA

1958 ◽  
Vol 38 (2) ◽  
pp. 139-144 ◽  
Author(s):  
G. C. Russell ◽  
A. D. Smith ◽  
U. J. Pittman
Keyword(s):  
Protein Content ◽  
Spring Wheat ◽  
Nitrogen Fertilizer ◽  
The Other ◽  
Nitrogen And Phosphorus ◽  
Hard Red Spring Wheat ◽  
Southern Alberta ◽  
Phosphorus Fertilizers ◽  
Significant Yield ◽  
One Year

Varying rates of nitrogen and phosphorus were applied to hard red spring wheat grown on stubble fields at three locations in southern Alberta in 1955 and 1956. Significant yield increases were obtained at the three locations in 1955 as a result of applications of nitrogen. At two of the three locations further increases in yield resulted from the addition of phosphorus. In 1956 significant yield increases were obtained at two of the three locations following nitrogen applications, and at only one of these locations did the addition of phosphorus result in further significant increases in yield. At two of the three locations in both 1955 and 1956 high rates of nitrogen fertilizer caused significant increases in protein content over the unfertilized check. Phosphorus additions significantly reduced the effect of nitrogen on the protein content at one location in one year, but had no consistent effect in the other experiments. The experimental results indicate that, when moisture is adequate, more than 40 lb. of nitrogen per acre, and at least 80 lb. per acre in some cases, must be applied before increases in protein content of spring wheat can be expected.

scholarly journals Effect of Nitrogen and Phosphorus Fertilization on the Growth and Yield of Mustard Under Irrigated Conditions in Agra District

2022 ◽  
Vol 22 (1) ◽  
pp. 151-154
Author(s):  
Avinash Singh ◽  
Keyword(s):  
Seed Yield ◽  
Agricultural Research ◽  
Growth And Yield ◽  
Phosphorus Fertilization ◽  
Rabi Season ◽  
Experimental Site ◽  
Nitrogen And Phosphorus ◽  
Additional Increase ◽  
N Level ◽  
Number Of Seeds

The present field experiment was conducted at Agricultural Research Farm of RBS College, Bichpuri Agra, during Rabi season of 2018-19. The soil of the experimental site is Gangetic alluvial. The experimental was laid out in RBD factorial having 3 main treatment (N level) and 4 sub treatments (P2O5 level) with 3 replications. All growth and yield attributing character increase with application of N @ 120 Kg-1 and P2O5 @ 60 kg-1. All the yield components i.e., number of siliquae plant-1, length of siliqua and number of seeds siliqua-1 improved with the increase in the level of nitrogen. Higher value of harvest index was associated with the application of 60 kg P2O5 ha-1. Seed yield increased appreciably with every additional increase in the level of nitrogen. Respectively 26.85 and 40.05 per cent higher seed yield ha-1 was obtained with the application of 80 and 120 kg ha-1 nitrogen as compared to 40 kg ha-1 .

EFFECT OF SOIL TYPE, SOIL MOISTURE, AND NITROGEN FERTILIZER ON THE GROWTH OF SPRING WHEAT

1961 ◽  
Vol 41 (1) ◽  
pp. 44-51 ◽  
Author(s):  
S. Dubetz
Keyword(s):  
Soil Moisture ◽  
Spring Wheat ◽  
Nitrogen Fertilizer ◽  
Loamy Sand ◽  
High Moisture ◽  
Yield Increase ◽  
Loam Soil ◽  
The Difference ◽  
Nitrogen Rates ◽  
Percentage Protein

Spring wheat was grown in the greenhouse on two soil types with nitrogen rates of 0, 30, 60, and 90 pounds per acre and at three moisture levels. Significant increases in yield of grain and significant decreases in percentage protein were obtained with increasing soil moisture on a loam soil but not on a loamy sand. Apparently, the difference in plant growth between soils may be attributed to the greater changes in moisture tension of the loam soil within the moisture ranges studied. The loam soil was also watered less frequently and the high moisture tensions were of longer duration.Both soils showed significant increases in yield of grain with increasing nitrogen fertilizer, but significant increases in percentage protein were obtained on the loam soil only. The largest yield increase per unit of nitrogen was obtained on the loamy sand. The growth of wheat on the loam soil was significantly superior in all respects except for the roots to that on the loamy sand. This is explained on the basis of differences in the original fertility of the two soils before treatment.

WILD OAT INTERFERENCE IN SUNFLOWER

1985 ◽  
Vol 65 (1) ◽  
pp. 219-222 ◽  
Author(s):  
W. O. CHUBB ◽  
G. H. FRIESEN
Keyword(s):  
Helianthus Annuus ◽  
Seed Yield ◽  
Critical Period ◽  
Oil Content ◽  
Field Experiments ◽  
Avena Fatua ◽  
Wild Oat ◽  
Helianthus Annuus L ◽  
Wild Oats ◽  
Postemergence Herbicides

In field experiments, sunflower (Helianthus annuus L. ’Hybrid 894’) recovered from initial effects of wild oat (Avena fatua L.) interference and yielded normally if the weed was removed within 4 wk after crop emergence and the crop was kept relatively free of wild oats thereafter until harvest. In widely spaced plantings, wild oats growing between-the-rows competed just as vigorously as in-the-row infestations. Selective postemergence herbicides did not always provide sufficient control of wild oats to prevent significant losses in sunflower yield.Key words: Competition, interference, seed yield, oil content, herbicides, critical period

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