Phosphate fertiliser residues in wheat-growing soils of the Western Downs, Queensland

Soil Research ◽  
1997 ◽  
Vol 35 (2) ◽  
pp. 341 ◽  
Author(s):  
W. M. Strong ◽  
E. K. Best ◽  
J. E. Cooper
Keyword(s):  
Field Experiments ◽  
Moisture Stress ◽  
P Uptake ◽  
Residual Effects ◽  
Wheat Crop ◽  
Soil Test ◽  
Phosphate Fertiliser ◽  
Plant Moisture ◽  
Field Plots ◽  
Extractable Soil

Effects of repeated annual application and residual effects of past phosphorus (P) applications were studied at Billa Billa and The Gums, Queensland, on 2 Vertisols representative of a large cropping area in this region. Phosphorus was applied annually at 0, 4, 8, 12, and 25 kg/ha at sowing to each wheat crop between 1978 and 1988. Phosphorus was also applied at 25, 50, 100, 200, or 400 kg/ha as a once-only application, before wheat was sown in 1978, and was incorporated by tillage. Pot experiments were conducted each year with soil (6 kg/pot) gathered from field plots in May before wheat sowing to determine the residual value (RV) of previously applied P fertiliser under standard conditions of frequent watering. In 1979 the RV was determined in a second series of pots with a water deficit to simulate conditions of plant moisture stress that were to dominate the field experiments. The RV of P fertiliser was reduced to one-third that determined under well-watered conditions. Low residual values (8–47%) determined in the field in 1979 for P rates 25 and 50 kg/ha applied in 1978 were probably due to reduced P uptake from dry topsoil throughout which P residues were incorporated by tillage. By contrast, P applied annually at a low rate (4 or 8 kg/ha) in a band close to seeds created profitable responses when evaluated over the sequence of successive wheat crops. The bicarbonate-extractable soil test value (Pbf) on either soil fertilised annually for n years with P at a rate R (kg/ha· year) was described by the model where Pbu is the soil test value (mg/kg) of unfertilised soil.

Soil water relations and relative turgidity on leaves in the wheat crop

1966 ◽  
Vol 17 (3) ◽  
pp. 269 ◽  
Author(s):  
RA Fischer ◽  
GD Kohn
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
Root Zone ◽  
Moisture Stress ◽  
Flowering Plant ◽  
Wheat Crop ◽  
Stage Of Development ◽  
South Wales ◽  
Plant Moisture

Trials were conducted in 1961 and 1962 at Wagga in southern New South Wales to investigate the yield physiology of the wheat crop. Various cultural treatments were applied to a single variety (Heron). The increases in evapotranspiration and associated reductions in total soil moisture content caused by early sowing, by heavier fertilizer applications, and to a lesser extent by a heavier rate of sowing were reflected in an increased plant moisture stress (reduced leaf relative turgidity) at a given time in the spring. At a given stage of development, however, relative turgidity was not much affected by time of sowing, and in fact post-flowering plant moisture stress increased with later sowing. There were only small treatment effects on the estimated depth and density of rooting. Relatively little water was extracted by crops from below 40 in.; dense crops reduced the soil moisture content throughout the root zone to less than the –15 bar value. Leaf relative turgidity at sunrise showed a consistent inverse relationship to soil moisture content in the root zone. Leaf turgidity (sunrise) was maintained at 100% until root zone moisture levels approached the –15 bar value.

Residual effects of phosphorus applied to soyabean or wheat in a soyabean–wheat cropping system on a typic haplustert

1996 ◽  
Vol 127 (3) ◽  
pp. 325-330 ◽  
Author(s):  
A. Subba Rao ◽  
K. Sammi Reddy ◽  
P. N. Takkar
Keyword(s):  
Residual Effect ◽  
Cropping System ◽  
Experimental Period ◽  
P Uptake ◽  
Residual Effects ◽  
Available P ◽  
First Year ◽  
Soil Test ◽  
Critical Limit ◽  
Olsen P

SUMMARYDuring a 3-year experimental period (between 1992 and 1995), residual effects on yields of subsequent crops of phosphorus applied either to soyabean or wheat, and on recoveries of the added P and changes in the available P, were studied in a soyabean–wheat cropping system on a typic haplustert very low in available P at Bhopal, India. Phosphorus was applied at rates of 0–52 kg P ha-1 (five treatments) to soyabean and 0–39 kg P ha-1 (three treatments) to wheat during the first year, and in the subsequent years the residual effects were studied in relation to fresh applications of 39 kg P ha-1 to each crop. The yields of soyabean and wheat were increased significantly by the application of P to each crop. Phosphorus applied to soyabean showed residual effects in two succeeding crops, whereas P applied to wheat showed a residual effect in only one succeeding crop. Phosphorus applied to soyabean was more efficiently utilized by the succeeding crops compared to that applied to wheat in the rotation. The recoveries of added P were greater with smaller rates of added P and greater in the first two residual crops. Olsen P in soil was adequate only in the first year and it fell below the critical limit in the subsequent two cycles of cropping. Cumulative P uptake by crops determined the levels of available P in the soil and soil test values declined with increase in cumulative P uptake over time.

Germination and Development of Honeyvine Milkweed (Ampelamus albidus) Seed

Weed Science ◽  
1981 ◽  
Vol 29 (6) ◽  
pp. 625-628 ◽  
Author(s):  
John K. Soteres ◽  
Don S. Murray
Keyword(s):  
Seed Production ◽  
Field Experiments ◽  
Sandy Loam ◽  
Moisture Stress ◽  
Planting Dates ◽  
Germination Temperature ◽  
Optimum Ph ◽  
Ph Range ◽  
Field Plots ◽  
Optimum Ph Range

The ability of honeyvine milkweed [Ampelamus albidus(Nutt.) Britt.] to establish and develop from seed was studied in laboratory and field experiments. Optimum germination temperature was 30 C. Seed incubated at cooler temperatures and then transferred to 30 C germinated equally as well as seed incubated continually at 30 C. Germination was unaffected at moisture stress levels between 0 and −4.6 bars, but was decreased at levels between −4.6 and −12.8 bars. The optimum pH range for germination was between 5 and 7. The greatest emergence of seedlings occurred at a depth of 0.5 cm with no emergence occurring at depths greater than 5 cm. Greater emergence was obtained with a loam than sandy loam at all planting depths except 0.5 cm. Field plots seeded on May 1 gave maximum seed production. Seed production decreased with each 2-week delay in planting. Planting dates of July 10 or later produced no seed. Seed germination was affected little by delayed planting. The following spring, regrowth from plants seeded on June 12 or later was less vigorous than regrowth from plants seeded earlier.

Response of spring-planted lettuce (Lactuca sativa L.) to freshly-applied and residual phosphorus and to phosphate fertiliser placement on a Karrakatta sand

1997 ◽  
Vol 37 (6) ◽  
pp. 701
Author(s):  
W. J. Robertson ◽  
I. R. McPharlin
Keyword(s):  
Lactuca Sativa ◽  
Maximum Yield ◽  
Relative Yield ◽  
P Uptake ◽  
Soil Test ◽  
Recovery Efficiency ◽  
Lactuca Sativa L ◽  
Phosphate Fertiliser ◽  
Soil Test P ◽  
Whole Plants

Summary. The phosphorus (P) requirements of crisphead lettuce (Lactuca sativa L. cv. Salinas) were measured over 2 consecutive spring plantings using superphosphate that was freshly applied and applied 9 months before planting, at 0–600 kg P/ha on a newly-cleared Karrakatta sand of low natural P fertility. The response of lettuce to placement of phosphate fertiliser (banded, broadcast) was also investigated. There was a significant (P<0.001) head yield response to level of applied P in all experiments. There was no significant effect of placement on yield even though the concentrations of P in the wrapper leaves were on average 12% higher in the broadcast treatment. A Mitscherlich function described the relationship of P uptake by whole plants and plant shoots to level of applied P. Recovery efficiency of P fertiliser (fertiliser P uptake by shoots/P applied, both in kg/ha) by shoots decreased from 0.12 at 50 to 0.05 at 600 kg applied P/ha. Phosphorus recovery efficiency by whole plants (shoots plus roots) decreased from 0.13 at 50 to 0.05 at 600 kg P/ha. The level of freshly-applied P required for 95 and 99% of maximum relative yield over the 2 years (maximum yield, 89–112 t/ha) was 185 and 286 kg P/ha (Mitscherlich relationship, R2 = 0.93), respectively, at <10 µg/g soil test P (newly-cleared sites). The marketable yield was 82 and 92% of total yield at 185 and 286 kg P/ha respectively. Bicarbonate-soluble P extracted from the top 15 cm of soil was determined on residual P sites over 2 years where P was applied at 0–600 kg/ha. These soil test levels were related to head yield in a Mitscherlich relationship (R2 = 0.90). The critical soil test P values required for 95 and 99% of maximum relative yield, over the 2 years, were 81 and 121 µg/g respectively. Phosphorus in the wrapper leaf at early heading required for 95 and 99% of maximum yield was 0.40 ± 0.02 and 0.42 ± 0.02% (spline regression, R2 = 0.81), respectively. Soil and plant testing could be used to assist in reducing fertiliser costs, improving the efficiency of use of freshly- and previously-applied fertiliser P by lettuce and reducing P losses to water systems on the Swan Coastal Plain in Western Australia. Changing placement from broadcasting to banding will not improve efficiency of phosphate fertiliser use by lettuce on Karrakatta sands.

Residual management of sulfur applied to soybean or wheat in a soybean - wheat system on Vertisols

Soil Research ◽  
1997 ◽  
Vol 35 (1) ◽  
pp. 199 ◽  
Author(s):  
A. N. Ganeshamurthy ◽  
P. N. Takkar
Keyword(s):  
Seed Yield ◽  
Critical Level ◽  
Residual Effect ◽  
Residual Effects ◽  
Wheat Crop ◽  
First Year ◽  
Soil Test ◽  
Regression Equations ◽  
S Uptake ◽  
Seed Yields

In a 3-year experiment on a typic Haplustert low in soil test sulfur (S), residual effects of S applied to either soybean or wheat in a soybean–wheat system were measured for seed yields, recoveries of added S, and changes in the soil test S. Sulfur as gypsum was applied at 5 rates (0–80 kg S/ha) to soybean and 4 rates (0–60 kg S/ha) to wheat during the first year. In subsequent years the residual effects were studied in relation to fresh application of 40 kg S/ha to each crop. Seed yields of soybean and wheat were increased significantly by the application of S to each crop. The rate 80 kg S/ha applied to soybean showed residual effects in 2 succeeding crops, while 60 kg S/ha applied to soybean or wheat showed residual effect in only 1 succeeding crop. The S applied to wheat was more effciently utilised than that applied to soybean in rotation. The rates 53 and 70 kg S/ha (calculated via regression equations) applied to soybean gave 90% of the seed yield of freshly applied S at 40 kg/ha in the succeeding wheat and soybean crops, respectively, and 57 kg S/ha applied to the wheat crop gave 90% of the seed yield in the succeeding soybean crop. The recoveries of added S were greater with smaller rates of added S and were greater in the first 2 residual crops. Soil test S was adequate only in the first year and fell below critical level in the subsequent cropping period. Cumulative S uptake determined the levels of available S in the soil.

scholarly journals Effects of Phosphatic Biofertilizer with Inorganic and Organic Sources of Phosphorus on Growth and Yield of Lentil

2013 ◽  
Vol 5 (2) ◽  
pp. 225-230 ◽  
Author(s):  
MA Haque ◽  
MK Khan
Keyword(s):  
Lens Culinaris ◽  
Field Experiments ◽  
P Uptake ◽  
Growth And Yield ◽  
Soil Test ◽  
Phosphate Solubilizing Bacteria ◽  
Liquid Form ◽  
Yield Attributes ◽  
Phosphate Solubilizing ◽  
Total P

Field experiments were conducted to evaluate the effects of phosphatic biofertilizer with inorganic or organic sources of P on lentil (Lens culinaris Medikus) (var. Binamasur 2), Phosphatic biofertilizer (PB). All the fertilizers and cowdung were applied on the basis of soil test values and Integrated Plant Nutrient System (IPNS). Mixed cultures of two phosphate solubilizing bacteria were used as phosphatic biofertilizer (PB). PB was applied as liquid form with lentil seeds before sowing. Phosphatic biofertilizer with inorganic or organic sources of P influenced the growth and yield attributes and yields of lentil at both the locations. Phosphatic biofertilizer with 50% P from TSP gave the highest seed and stover yields as well as total P uptake by lentil compared to the 100% P from TSP. The results revealed that 50% inorganic or organic sources of P can be saved by the integrated using of phosphatic biofertilizer for the lentil cultivation in Bangladesh.DOI: http://dx.doi.org/10.3329/jesnr.v5i2.14819 J. Environ. Sci. & Natural Resources, 5(2): 225-230 2012

Response of onions (Allium cepa L.) to phosphate fertiliser placement and residual phosphorus on a Karrakatta sand

1999 ◽  
Vol 39 (3) ◽  
pp. 351 ◽  
Author(s):  
W. J. Robertson ◽  
I. R. McPharlin
Keyword(s):  
Maximum Yield ◽  
Relative Yield ◽  
P Uptake ◽  
Soil Test ◽  
Recovery Efficiency ◽  
Mature Leaves ◽  
Phosphate Fertiliser ◽  
Allium Cepa L ◽  
Soil Test P ◽  
Bulb Yield

The phosphorus (P) requirement of irrigated onions (Allium cepa L. cv. Creamgold) was measured over 2 consecutive spring plantings using superphosphate that was freshly-applied and applied 9 months before planting, at 0–800 kg P/ha on a newly cleared Karrakatta sand of low natural P fertility. The response of onions to placement of phosphate fertiliser (banded or broadcast) was also investigated. There was a significant (P<0.001) bulb yield response to level of applied P in all experiments. There was no significant effect of placement on yield although the concentrations of P in the youngest mature leaves and bulbs were on average 18% higher (i.e. 0.40 v. 0.34%) than in the broadcast treatment. A rectangular hyperbola described the relationship of P uptake by shoots or bulbs to level of applied P. Recovery efficiency (RE) of fertiliser P (P uptake by bulbs at rate i of applied P – uptake in absence of applied P/rate i of applied P) by bulbs after curing decreased from 0.43 at 50 kg P/ha to 0.06 at 600 kg P/ha. Recovery efficiency by bulbs at applied P required for 95 and 99% of maximum yield was 0.20 and 0.14 respectively. The level of freshly-applied P required for 95 and 99% of maximum relative yield over the 2 years (maximum yield, 80–100 t/ha) was 122 and 203 kg P/ha (Mitscherlich relationship, R2 = 0.82), respectively, at <10 g/g Colwell P soil test (newly cleared sites). The marketable (total – reject) yield was 94% and 92% of total yield at 122 and 203 kg P/ha respectively. Bicarbonate-soluble P extracted from the top 15 cm of soil was determined on residual P sites over 2 years where P was applied at 0–800 kg/ha. These soil test levels were related to bulb yield in a Mitscherlich relationship (R2 = 0.90). The critical soil test P values required for 95 and 99% of maximum relative yield, over the 2 years, were 50 and 80 g/g respectively. Phosphorus in the youngest mature leaves required for 95 and 99% of maximum yield ranged from 0.22–0.28 to 0.26–0.32%, respectively, from the Mitscherlich regressions, depending on plant stage (i.e. leaf number or days after sowing) although there was no consistent trend with age. Soil testing can be used to reduce current applications of fertiliser P without reducing yield. Plant testing can be used to monitor the P status and associated fertiliser needs of onions on sands. Both these testing procedures need to be verified in commercial crops with a wide variation in soil test P levels and management practices. Soil and plant testing could therefore be used to reduce fertiliser application and cost, improve fertiliser RE by onions and reduce fertiliser P losses to water systems on the Swan Coastal Plain. Changing placement from broadcasting to banding does not appear to improve the efficiency of phosphate fertiliser use by irrigated onions on Karrakatta sands.

Interactions of zinc with banded and broadcast phosphorus fertilizer on the concentration and uptake of P, Zn, Ca and Mg in plant tissue of oilseed flax

1993 ◽  
Vol 73 (1) ◽  
pp. 17-29 ◽  
Author(s):  
C. A. Grant ◽  
L. D. Bailey
Keyword(s):  
Dry Matter ◽  
Field Experiments ◽  
Tissue Concentration ◽  
P Uptake ◽  
Residual Effects ◽  
Dry Matter Production ◽  
Residual P ◽  
Linum Usitatissimum L ◽  
Matter Production ◽  
Previous Season

Field experiments on four sites over 3 yr evaluated the effect of banded and broadcast applications of fertilizer P, with and without application of Zn on the tissue concentration and uptake by the plant of Zn, P, Ca, and Mg in oilseed flax (Linum usitatissimum L.). Residual effects of the P applications were also evaluated over five site-years. Banded applications of P tended to be more effective than either broadcast applications or residual P in increasing tissue concentration and uptake of P. Zinc application tended to decrease P concentration in the tissue where P levels were relatively high. When Zn was applied with banded P applications, it tended to reduce P uptake by the plant; when it was applied with broadcast P, it tended to increase P uptake by the plant. Changes in P uptake in response to Zn application generally reflected changes in dry matter production. When an increase in Zn concentration in the tissue or uptake by the plant occurred due to Zn applications, it was primarily when the Zn was applied with broadcast P fertilizer or where P had been broadcast the previous season. The increase in uptake of Zn generally reflected increased dry matter yield. Banded applications of P tended to produce lower tissue concentrations of Zn than did broadcast applications. Zinc concentration in the tissue also tended to be reduced by residual P from applications the previous season. Changes in Ca concentration in the tissue and uptake by the plant generally reflected changes in dry matter production. However, Mg concentration in the tissue and uptake by the plant were increased by P applications, particularly where P was banded. The increase in concentration in the tissue and uptake of Mg by the plant with application of P indicates that applications of P increase the ability of the plant to absorb Mg, presumably due to an effect on the absorption-translocation system within the plant. Key words: Flax, P placement, P, Zn, Ca, Mg

Bio-efficacy of post emergence herbicides in boro rice nursery as well as main field and their residual effects on non-target microorganisms

2020 ◽  
Vol 57 (3) ◽  
pp. 199-210
Author(s):  
Rajib Kundu ◽  
Mousumi Mondal ◽  
Sourav Garai ◽  
Ramyajit Mondal ◽  
Ratneswar Poddar
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Field Experiments ◽  
Block Design ◽  
Resistance Index ◽  
Residual Effects ◽  
Cost Ratio ◽  
Main Field ◽  
Weed Species ◽  
Similar Treatment

Field experiments were conducted at research farm of Bidhan Chandra Krishi Viswavidyalaya, Kalyani, West Bengal, India (22°97' N latitude and 88°44' E longitude, 9.75 m above mean sea level) under natural weed infestations in boro season rice (nursery bed as well as main field) during 2017-18 and 2018-19 to evaluate the herbicidal effects on weed floras, yield, non-target soil organisms to optimize the herbicide use for sustainable rice-production. Seven weed control treatments including three doses of bispyribac-sodium 10% SC (150,200, and 250 ml ha-1), two doses of fenoxaprop-p-ethyl 9.3% EC (500 and 625 ml ha-1), one weed free and weedy check were laid out in a randomized complete block design, replicated thrice. Among the tested herbicides, bispyribac-sodium with its highest dose (250 ml ha-1) resulted in maximum weed control efficiency, treatment efficiency index and crop resistance index irrespective of weed species and dates of observation in both nursery as well as main field. Similar treatment also revealed maximum grain yield (5.20 t ha-1), which was 38.38% higher than control, closely followed by Fenoxaprop-p-ethyl (625 ml ha-1) had high efficacy against grasses, sedge and broadleaf weed flora. Maximum net return (Rs. 48765 ha-1) and benefit cost ratio (1.72) were obtained from the treatment which received bispyribac-sodium @ 250 ml ha-1. Based on overall performance, the bispyribac-sodium (250 ml ha-1) may be considered as the best herbicide treatment for weed management in transplanted rice as well as nursery bed.

Experiments measuring the residual effects of nitrogen fertilizers

1965 ◽  
Vol 65 (2) ◽  
pp. 195-200 ◽  
Author(s):  
F. V. Widdowson ◽  
A. Penny
Keyword(s):  
Potato Crop ◽  
Nitrogen Fertilizers ◽  
Residual Effects ◽  
Wheat Crop ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
Potato Yields

The experiment testing N residues (made on a clay-loam soil) clearly showed that N applied for potatoes benefited the following wheat crop, but that N applied for wheat benefited the following potato crop little. There were no worth-while 1. An experiment on a clay-loam soil measured responses to three amounts of nitrogen on alternate crops of wheat and potatoes; these dressings were tested in all combinations with three rates of N applied 1 and 2 years previously. Nitrogen applied for potatoes consistently increased yields of following wheat. The residue from applying 1·5 cwt. N/acre for potatoes was equivalent to topdressing the wheat with 0·55 cwt. N/acre; the value of the residue was decreased by applying N to the wheat. Potato yields were increased little by applying N to the preceding wheat crop and the residues were of little significance when compared with the responses to new N. There was no gain from N applied 2 years previously for either crop.

Sign in / Sign up

Export Citation Format

Share Document