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

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.

Soil Research ◽  
1997 ◽  
Vol 35 (1) ◽  
pp. 199 ◽  
Author(s):  
A. N. Ganeshamurthy ◽  
P. N. Takkar

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.


Soil Research ◽  
1997 ◽  
Vol 35 (2) ◽  
pp. 341 ◽  
Author(s):  
W. M. Strong ◽  
E. K. Best ◽  
J. E. Cooper

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.


2013 ◽  
Vol 373 (1-2) ◽  
pp. 711-722 ◽  
Author(s):  
Sean D. Mason ◽  
Mike J. McLaughlin ◽  
Caroline Johnston ◽  
Ann McNeill

Author(s):  
K. Thakuria ◽  
C. Thakuria

A field experiment was carried out during kharif, 2012 to summer, 2013 under rainfed condition in the organic block of Assam Agricultural University, Jorhat to find out the effect of different green manuring practices and other organic sources of nutrient on productivity of scented (joha) rice and their residual effect on linseed crop. Results revealed that though green manuring practice had no significant effect on yield and yield attributes of both scented (joha) rice and succeeding relayed linseed crop but higher values were recorded with the incorporation of dhaincha as in-situ green manuring in respect of all the yield attributes and yield of both the main and succeeding crops. Among various organic sources of nutrient, application of enriched compost produced the highest yield in both scented rice as well as linseed crop. The increase in grain yield of scented rice with enriched compost over the other sources of organic nutrient and control treatment ranged from 7.33 to 30.04 per cent. The corresponding increase in case of linseed crop ranged from 29.1 to 39.8 per cent which reflected better residual effects of both the sources of nutrient on linseed crop. The residual available nutrient contents in soil after harvest of linseed crop showed similar trends and increased all the major nutrients over their initial status.


Author(s):  
Gilles Jiope Azangue ◽  
Fernand Tendonkeng ◽  
David Fokom Wauffo ◽  
Etienne Tedonkeng Pamo

Aim: A study was conducted at the Research and Experimental Farm (REF) of the University of Dschang with the aim of evaluating the direct and residual effects of fertilization with hen droppings on the growth and biomass yield of Brachiaria ruziziensis at flowering. Methodology: A factorial design with five levels of fertilization in terms of nitrogen in hen droppings (0, 25, 50, 75 and 100 kg N/ha) on 6 m2 (3 m x 2 m) plots in four replicates, i.e. a total of 20 experimental plots was used. Fertilization with hen droppings was done one month after the placement of the stump chips, during the first year of cultivation (direct effects). In the second year of cultivation (residual effects), no fertilization was done. Measurements of plant heights and diameters were made on 40 plants per level of fertilization. Leaf, stem and whole-plant biomass assessments were made on all plots in relation to their fertilization levels. Results: This study shows that the direct effect of fertilization in the form of hen droppings resulted in heights and diameters significantly greater than those obtained under the residual effect of fertilization. Biomasses of whole plants and their different compartments obtained under the residual effect of fertilization were significantly higher than those obtained under the direct effect of fertilization. Under the direct and residual effect of fertilization, the heights, diameters and biomasses of the fertilized plots were greater than those of the control plots. The level of fertilization corresponding to the dose of 100 kg N/ha gave the best results. Conclusion: Fertilization with hen droppings at a dose of 100 kg N/ha would be recommended for the cultivation of B. ruziziensis over a two-year period, in order to limit the use of mineral fertilizers.


2017 ◽  
Vol 104 (4 - 6) ◽  
Author(s):  
Elangovan R ◽  
◽  
Chandra Sekaran N

Field experiments were conducted to study the effect of biochar with/without FYM and inorganic fertilizers on soil productivity of cotton – maize – cowpea based cropping system and to examine the direct, cumulative and residual effects of biochar on soil properties at field No.36 B, Eastern block, TNAU, Coimbatore, on an Inceptisol belongs to Periyanaickenpalayam series and Vertic Ustropept in USDA classification. The study reveals that application of biochar irrespective of levels, increased the available N, P and K of the post harvest clay loam soil of cotton. The effect was increased with corresponding increase in the rate of application. Significant improvement was found when biochar was applied in conjunction with fertilizers and FYM. Among the treatments, the trend of results were significantly higher in biochar @ 10 t + 100 % NPK + FYM followed by biochar @ 10 t + 75% NPK + FYM treatment which was statistically on par with biochar @ 7.5 t + 100 % NPK + FYM treatment. Similar trend of direct effect was registered in the post harvest soil of maize grown under both cumulative (continuous application) and residual (one time application) studies. However, the effect was higher under cumulative study than the residual study. Similar trend of results were also registered in the post harvest soil of cowpea under both the cumulative residual (residual effect of continuous application) and second residual (second residual effect of one time application) studies. A significant improvement in the soil properties of post harvest soil of cowpea under second residual study was also recorded. Thus, proving the biochar’s ability to sustain the soil fertility over long run.


1982 ◽  
Vol 22 (115) ◽  
pp. 95
Author(s):  
BD McLaughlin ◽  
ICR Holford

The short and medium-term effects of three sulfur fertilizers on white clover pasture were measured on a sulfur-deficient basaltic soil in the Northern Tablelands of New South Wales between 1976 and 1979. The treatments were a single application of elemental sulfur, gypsum, and sulfur-fortified superphosphate (SF45) at 0, 20, 40, and 80 kg S/ha and three annual applications of elemental sulfur and gypsum at 0, 10, 20 and 30 kg S/ha. Gypsum and SF45 gave the largest effects in the first year, and elemental sulfur and SF45 caused the largest residual effects in the third year. A single application of 20 kg S/ha gave near maximum yields over the three year period provided that most of the sulfur was supplied in the elemental form. However, to achieve maximum yields in the first year about 20% of the sulfur was required as sulfate. Likewise maximum yields in the third year required a fresh application of 10 sulfate S/ha. The relatively large residual effect of gypsum was attributed to the slow-leaching soil, and the resistance of the coarse textured elemental sulfur (65% >0.5mm) to leaching by the high summer rainfall.


2007 ◽  
Vol 55 (3) ◽  
pp. 347-353
Author(s):  
E. Shekinah ◽  
A. Alagesan ◽  
C. Jayanthi ◽  
N. Sankaran

A farming system experiment was conducted under dryland conditions in the western zone of Tamil Nadu with cropping, agroforestry, pigeons, goats, buffaloes and farm pond as the enterprise combination from July 2000 to March 2002. The cropping system of sorghum (fodder) + cowpea (fodder) followed by chickpea + coriander was supplied with either composted goat manure or composted buffalo manure at 100 or 75% of the production levels in order to investigate the effect of the source and amount of manures from the livestock enterprises linked in the system on cropping. The application of composted buffalo manure at 100% production level resulted in higher yield attributes, yield and returns in the second year, though the application of the recommended dose of fertilizers gave higher values for the same parameters in the first year, due to the buildup of nutrients over time. Higher yields of chickpea and coriander also indicated the favourable residual effect of the organic manures. This treatment ranked best with the highest benefit to cost ratio among the treatments imposed.


1980 ◽  
Vol 94 (3) ◽  
pp. 533-538 ◽  
Author(s):  
R. C. Sharma ◽  
J. S. Grewal ◽  
M. Singh

SummaryA long-term manurial experiment on potatoes was initiated in 1970 on the acidic brown hill soil of Simla to study the effects of fertilizers supplying per hectare: 44 kg P (P44); 44 kg P and 125 K (P44K125) and 88 kg P with 125 kg (P88K125) and of farmyard manure (FYM) supplying 44 kg P/ha applied annually and biennially. The potatoes gave large responses to all the manures. The annual or biennial effects of FYM measured in years of application were as great as that of P and K fertilizer in increasing tuber yield and K uptake by tubers but FYM increased P uptake more than fertilizers did. FYM applied each year gave largest uptake of P. P88 treatment was not better than P44 treatment. The residual effects of the manures on yield were measured in years when the treatments were not applied; the residual effects of FYM were higher than those of fertilizers. Mean residual effects of the treatments on P uptake were 46% and 51% of their annual or biennial effects respectively. About 90% of P added to the soil was not taken up by the crops and was present in the forms of aluminium-bound P, iron-bound P and calcium-bound P in this descending order. The residual effects of the treatments on K uptake were about 84% of their annual or biennial effects. About 60% of K applied to the soil was not taken up by the crops and most was present in exchangeable form. Annual applications of all the manures were better than their biennial applications indicating that residual effects built up from three applications over 6 years were too small to sustain yields.Soil analyses made 6 years after the start of the experiment showed that FYM was a better source of P than single superphosphate in increasing soil available P. FYM also increased soil exchangeable K more than the K fertilizer did. The highest increase in available P and K in soil was from annual applications of manures. Biennial applications of P as superphosphate or FYM resulted in P accumulating in the soil, while biennial K fertilizer dressings did not increase exchangeable K; however, biennial FYM did increase exchangeable K. Using P alone reduced soil available K. FYM increased pH, organic carbon and total N in soils while P and K fertilizer increased only the pH.


Author(s):  
Gilles Jiope Azangue ◽  
Fernand Tendonkeng ◽  
Victor François Nguetsop ◽  
David Fokom Wauffo ◽  
Etienne Tedonkeng Pamo

Aim: A study was conducted at the Research and Experimental Farm (REF) of the University of Dschang between March 2015 and December 2016, and then at the Animal Nutrition Laboratory of the Faculty of Agronomy and Agricultural Sciences. The objective of this study was to evaluate the direct and residual effects of fertilization with hen droppings on the protein content of Brachiaria ruziziensis at different phenological stages. Methodology: A factorial design comprising five levels of fertilization in terms of nitrogen in the form of hen droppings (0, 25, 50, 75 and 100 kg N/ha), and three phenological stages of cutting (bolting, flowering and after seed set) on 6 m2 plots (3 m x 2 m) in four replicates, i.e. a total of 60 experimental plots was used. Fertilization with hen droppings was done one month after the stump chips were grown in the first year of cultivation (direct effects). In the second year of cultivation (residual effects), no fertilization was applied. The total nitrogen content of the plant samples was determined by the Kjeldhal method and the crude protein contents were obtained by multiplying the nitrogen contents by the forage-specific coefficient of 6.25. Results: This study showed that protein contents obtained under the direct effect were significantly higher than those obtained under the residual effect of fertilization. Fertilization at 100 kg N/ha resulted in the highest protein contents under direct and residual fertilization. Conclusion: In view of the results obtained, fertilization with hen droppings at a dose of 100 kg N/ha would be recommended for the cultivation of B. ruziziensis in order to limit mineral fertilizer inputs and improve its protein content.


Sign in / Sign up

Export Citation Format

Share Document