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.

THE EFFECT OF N AND P FERTILIZATION ON WINTER SURVIVAL OF WINTER WHEAT UNDER ZERO-TILLED AND CONVENTIONALLY TILLED MANAGEMENT

1984 ◽  
Vol 64 (2) ◽  
pp. 293-296 ◽  
Author(s):  
C. A. GRANT ◽  
E. H. STOBBE ◽  
G. J. RACZ
Keyword(s):  
Winter Wheat ◽  
Key Words ◽  
Nitrogen Fertilization ◽  
Winter Survival ◽  
Phosphorus Fertilization ◽  
Zero Tillage ◽  
P Fertilization ◽  
Nitrogen And Phosphorus ◽  
Nitrogen Phosphorus ◽  
Tilled Land

A preliminary field study was conducted to investigate the influence of fall applications of nitrogen and phosphorus on winter survival of winter wheat on zero-tilled and conventionally tilled land. Nitrogen fertilization tended to decrease winter survival while phosphorus fertilization tended to increase survival. A N-P interaction was observed, with the decrease in survival in response to added N being more evident in the absense of applied P. Balanced N-P fertilization may therefore result in highest winter survival in both conventionally tilled and zero-tilled winter wheat. Key words: Zero-tillage, winter survival, nitrogen, phosphorus, winter wheat

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.

scholarly journals Yield and Nutritional Quality of Cabbage as Affected by Nitrogen and Phosphorus Fertilization

1970 ◽  
Vol 41 (1) ◽  
pp. 41-46
Author(s):  
KMF Haque ◽  
AA Jahangir ◽  
ME Haque ◽  
RK Mondal ◽  
MAA Jahan ◽  
...  
Keyword(s):  
Block Design ◽  
Growth Yield ◽  
Nutrient Content ◽  
Phosphorus Fertilization ◽  
Fertilizer Treatment ◽  
P Fertilization ◽  
Nitrogen And Phosphorus ◽  
Titrable Acidity ◽  
Nitrogen Phosphorus

An experiment was conducted in field condition to study the effect of nitrogen-phosphorus fertilization on growth, yield and nutrient content of cabbage. The experiment was laid out in randomize block design with three replications. The yield and yield components were maximized by N3P2 fertilizer treatment. Nutrient content of cabbage varied with fertilizer treatment. The maximum amount of reducing sugar, ascorbic acid, phosphorus were found at the highest rate of N - P fertilization whereas accumulation of titrable acidity, iron, calcium were maximum at the rate of N2P2 treatment. However pH, ash content were more or less same throughout the experiment. Bangladesh J. Sci. Ind. Res. 41(1-2), 41-46, 2006

BLOAT INVESTIGATIONS: II. A COMPARISON OF THE TRUE PROTEIN AND ELEMENT CONTENTS OF ALFALFA HAY FROM BLOATING AND NON-BLOATING FARMS

1964 ◽  
Vol 44 (2) ◽  
pp. 175-181 ◽  
Author(s):  
J. E. Miltimore ◽  
J. M. McArthur ◽  
J. L. Mason ◽  
R. B. Carson
Keyword(s):  
Correlation Coefficient ◽  
Correlation Coefficients ◽  
Nitrogen And Phosphorus ◽  
Stage Of Development ◽  
Alfalfa Hay ◽  
Calcium Magnesium ◽  
Similar Range ◽  
The Mean ◽  
True Protein ◽  
Nitrogen Phosphorus

Alfalfa samples at the hay stage of development were harvested by hand from 35 farms where bloat was a serious problem and from 38 farms where bloat did not occur even on lush legume pastures. The samples were analysed for nitrogen, phosphorus, potassium, sulphur, calcium, magnesium, and true protein. There were no differences in the mean contents of these constituents between bloating and non-bloating farms. There were wide ranges within both types of farm; true protein for example varied from 7.3 to 14.6% in alfalfa from bloating farms, with a similar range from 7.7 to 16.9% from non-bloating farms. Correlation coefficients revealed a significant association between nitrogen and phosphorus (.488) in alfalfa from non-bloating farms. There were significant associations between sulphur and nitrogen (.366) and between sulphur and protein (.707) in alfalfa from bloating farms. This correlation between sulphur and protein was the only coefficient that was significantly different from the corresponding correlation coefficient for non-bloating farms.

A comparison of the fine root component of a pure and a mixed coniferous stand

1988 ◽  
Vol 18 (11) ◽  
pp. 1416-1426 ◽  
Author(s):  
H. M. McKay ◽  
D. C. Malcolm
Keyword(s):  
Fine Roots ◽  
Standing Crop ◽  
Fine Root ◽  
Sitka Spruce ◽  
Nitrogen And Phosphorus ◽  
Mixed Stands ◽  
Method Of Calculation ◽  
The Mean ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

Fine roots were sampled at monthly intervals during 1984–1985 in pure plots of Sitka spruce (Piceasitchensis (Bong.) Carr.) and mixed plots of Scots pine (Pinussylvestris L.) and Sitka spruce established on an upland heath in 1969. Both types of planting had received phosphorus and potassium fertiliser but no nitrogen. The mean standing crop of live roots (<2 mm diameter) in the top 5 cm of pure spruce plots was 112 g • m−2, almost double that of mixed stands (37 g • m−2 of spruce plus 20 g • m−2 of pine). Necromass was 80% of total mass in both stand types. Concentrations of nitrogen and phosphorus were greater in pure plots than in mixed plots, but fine root capital of nitrogen, phosphorus, and potassium was greater in pure spruce than in mixed plots (biomass and necromass contained 11, 2, and 5 and 45, 4, and 7 kg • ha−1 of nitrogen, phosphorus, and potassium, in pure plots, and 7, 1, and 3 and 30, 3, and 3 kg • ha−1 of nitrogen, phosphorus, and potassium in mixed plots, respectively). Production of fine roots in pure and mixed stands was estimated at 181 and 97 g • m−2•year−1 or 715 and 367 g • m−2•year−1, respectively, depending on the method of calculation. Fine roots of pure plots were highly concentrated in the top 3 cm. In mixture, spruce roots had a less extreme vertical distribution and pine roots were more evenly distributed down to 9 cm.

Genetic differences in the copper nutrition of cereals. II.* Genotypic differences in response to copper in relation to copper, nitrogen and other mineral contents of plants

1976 ◽  
Vol 27 (4) ◽  
pp. 465 ◽  
Author(s):  
EKS Nambiar
Keyword(s):  
Copper Deficiency ◽  
Differential Sensitivity ◽  
Grain Protein ◽  
Genotypic Differences ◽  
Nitrogen And Phosphorus ◽  
Mineral Contents ◽  
Copper Status ◽  
The Mean ◽  
Nitrogen Phosphorus ◽  
Protein Part

Cereal genotypes differed considerably in their sensitivity to copper deficiency. Copper concentrations in the leaves and grains were determined to see whether they reflected the copper status of plants. Nitrogen, phosphorus, calcium, zinc and manganese in the grains from normal plants were determined and the interrelationships between the mineral-accumulating ability of genotypes and their sensitivity to copper deficiency were examined. Copper concentration in the shoot at mid-tillering, when copper deficiency may be recognizable, clearly distinguished severely copper-deficient plants from copper-sufficient ones. In deficient plants, the mean concentrations of copper in the youngest leaves and older leaves were <1.0 and <2.0 ppm respectively. However, after maturity, copper concentrations in flag leaves and grain did not reflect the copper status of the plants. Nor did the content and distribution of copper in the plants explain the differential sensitivity of genotypes to copper deficiency. Accumulation of nitrogen, phosphorus, calcium, zinc, manganese and copper in the grain varied between genotypes. Nitrogen and phosphorus concentrations in the grains of normal plants were related to the differential responses of genotypes to copper. Evidence shows that the cereal genotypes with higher grain protein contents are potentially more susceptible to copper deficiency than those with relatively lower grain protein. ____________________ *Part 1, Aust. J. Agric. Res., 27: 453 (1976).

Effects of Water and Fertilizer Managements on Yield, Nutrition Uptake of Rice and of Nitrogen and Phosphorus Loss of Runoff from Paddy Field

2012 ◽  
Vol 610-613 ◽  
pp. 1527-1532
Author(s):  
Dong Feng Huang ◽  
Ping Fan ◽  
Wei Hua Li ◽  
Li Min Wang ◽  
Xin Jian Lin ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Paddy Field ◽  
Rice Plant ◽  
Dry Matter ◽  
Irrigation Treatment ◽  
Phosphorus Fertilization ◽  
Dry Matter Yield ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Loss ◽  
Irrigation Optimization

On the condition of natural rainfall and through the measure method of field runoff plots, an field experiment with six water and fertilizer managements (i.e. none fertilization and routine irrigation, routine fertilization and routine irrigation, optimization fertilization and routine irrigation, increasing nitrogen fertilization and routine irrigation, increasing phosphorus fertilization and routine irrigation, optimization fertilization and optimization irrigation) in 3 years ( 6 stubbles of rice) was carried out to study the effects of water and fertilizer managements on yield, nutrition uptake of rice and loss of nitrogen and phosphorus by runoff from paddy field. The results show that, under the 6 water and fertilizer managements, the dry matter yield of rice is 11629 ~ 19709 kg hm-2 a-1, the uptake of nitrogen, phosphorus and potassium in rice plant are 90 ~ 174 kg•hm-2 a-1, 36 ~ 62 kg hm-2 a-1, 151 ~ 288 kg hm-2 a-1, respectively, and the loss of nitrogen and phosphorus by runoff from paddy field are 14.0 ~ 42.9 kg hm-2 a-1 and 0.244 ~ 0.559 kg hm-2•a-1, respectively. Moreover, the dry matter yield of rice, the uptake of nitrogen and potassium in rice plant and the loss of nitrogen by runoff from paddy field under the treatment of “increasing nitrogen fertilization and routine irrigation” are relative higher than others. And the rice yield and nutrient uptake of “optimization fertilization + optimization irrigation” treatment is equivalent with “routine fertilization + routine irrigation”, but nitrogen and phosphorus loss of surface runoff reduce obviously, and the irrigation water is saved by 900.5 m3 hm-2 a-1, synchronously. Thus, better economical and environmental benefit would be reached by the treatments of “optimization fertilization and optimization irrigation”.

Early growth responses of blue gums on the basaltic plains to ripping, mounding and fertiliser application

2000 ◽  
Vol 40 (7) ◽  
pp. 987 ◽  
Author(s):  
R. R. Bird ◽  
D. W. Jowett ◽  
T. T. Jackson ◽  
G. A. Kearney ◽  
M. J. Waters ◽  
...  
Keyword(s):  
Tree Height ◽  
Seed Orchard ◽  
Stem Volume ◽  
First Year ◽  
Growth Responses ◽  
The Mean ◽  
Fertiliser Application ◽  
Western Victoria ◽  
Source Site ◽  
Nitrogen Phosphorus

The effect of ripping, mounding and fertiliser application on growth of E. globulus spp. globulus (Tasmanian blue gum) was assessed on 2 sites on the basaltic plains in south-western Victoria. The sites were gravelly loam duplex soils on a well-drained hillcrest and a clay–loam duplex soil on a valley flat that has impeded drainage in winter. The ground preparation treatments comprised a control (herbicide only), ripping to 65 cm, ripping plus small mounds (20 by 40 cm) and ripping plus large mound (60 by 150 cm). The fertiliser treatments were nil, 125, 250 and 500 g of fertiliser (nitrogen, phosphorus, potassium, sulfur) applied per tree 2 months after planting. The basal phosphorus, sulfur and potassium content of topsoil was 8–11, 11–14 and 140–220 mg/kg, respectively, for both sites. Rainfall in 1996, 1997 and 1998 was 695, 497 and 697 mm, respectively. This paper reports growth of 2 seedlots of blue gums (Yeodene Seed Orchard and Otway Ranges, Lorne) at 10 and 23 months after planting in Sep.–Oct. 1996 at 4 by 2 m spacing. The mean height of trees on the hillcrest site was 1.5 and 4.2 m at these times, respectively. For the valley flat, the mean heights were 0.9 and 3.0 m, respectively. On the hillcrest, ripping significantly increased tree height in the first year, but after 23 months neither height nor stem volume was greater than on unripped lines. Use of small mounds did not affect growth of trees at this site, whereas large mounds increased growth. At 10 months, tree height was greater (P<0.05) on the ripped plus large mounds than on the ripped only treatment, but this effect was lost at 23 months. Stem volume was 15% greater than on the ripped only treatment at 23 months, and 22% greater than the control. Trees from the Otway Ranges seedlot were taller and had 17% greater stem volume than trees from the Yeodene Seed Orchard seedlot at 23 months. For the valley flat, there were significant seedling source × site preparation interactions for height at 10 and 23 months (P<0.05), and for stem diameter and volume at 23 months (P<0.01), with the Otway seedlot performing better on the large mounds. There were no effects of fertiliser application on height, diameter or stem volume at 23 months on either site. The results indicate that planting on large mounds can improve early tree growth on farmland sites on the basaltic plains, but ripping without mounding, or fertiliser application in the first 2 years, is unlikely to improve performance.

scholarly journals Diagnostic leaf to evaluate the nutritional status of Jatropha

Revista CERES ◽  
2015 ◽  
Vol 62 (6) ◽  
pp. 607-613 ◽  
Author(s):  
Carlos Hissao Kurihara ◽  
Cesar José da Silva
Keyword(s):  
Nutritional Status ◽  
Analytical Determination ◽  
Phosphorus Fertilization ◽  
Nitrogen And Phosphorus ◽  
Nutrient Contents ◽  
Mature Leaves ◽  
Calcium And Magnesium ◽  
Nitrogen Phosphorus ◽  
Experimental Plots

ABSTRACT The analytical determination of nutrient levels in recently mature leaves in order to diagnose nutritional status is based on the fact that leaves are metabolically active and more sensitive to variation in nutrients of the soil. In most of cases, there is a direct well known between foliar content and the development and yield of the plant. However, for a more accurate interpretation, it is essential to establish the index leaf. There are few published studies about Jatropha with contrasting results. In order to establish the index leaf, in adult plants, the macronutrient levels were evaluated in samples collected in experimental plots, in which doses of nitrogen and phosphorus were applied, in two parts of the floral branches (in the top and in the middle thirds); and in three positions of leaves of the floral branch (between the 1st and 3rd, 6th and 8th, and 13th and 15th leaves below the inflorescence). The location of the leaf on the plant significantly affects nutrient contents. Nitrogen, phosphorus, potassium and sulfur tend to have higher concentration in young tissues. Calcium and magnesium showed higher levels in the basal leaves of floral branches. Samples collected in the top third of plants (between the 6th and 15th leaves of the floral branch) are more sensitive to variations of nitrogen and phosphorus fertilization. Therefore, we indicate the 6th to 15th leaves of the top third plants as index leaves estimate nutritional status of Jatropha.

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