Search results
8 result(s) search for keyword(s) 'phosphorus' 
Refine your search
in Proceedings of the Second National Soil Fertility Research Workshop, 24-25 March, 2015. Soil Science Division, NARC, Khumaltar, Lalitpur, Nepal / Krishna B. Karki
Title : Phosphorus speciation in nitisol from ethiopian highlands Material Type: printed text Authors: H.R Upadhayay, Author ; S.C França, Author ; P Boeckx, Author Pagination: 216-232 p. Languages : English (eng) Keywords: Inner-sphere complex, phosphorus adsorption capacity (PAC), pool, Sesquioxides. Abstract: Phosphorus (P) is considered as a primary limiting nutrient for faba bean (Vicia faba L.) production in Nitisol (Western and South-western Ethiopian highlands) due to strong adsorption of P to Al and Fe (hydr)oxides. The objective of this research was to differentiate the P into various pools on the basis of its plant availability with respect to different depths. The soil was collected in the bulk as well as at three depths from an agricultural field. A modified Hedley sequential P fractionation was carried out to differentiate phosphorus into different fractions. Sum of all the P fractions [Pt(sum)] ranged from 648 to 1024 mg P kg-1 at 25 and 5 cm depth, respectively. Concentration of Fe in the soils extracted via dithionite-citrate (Fed) ranged from 37 to 41 g kg-1. The amounts of Al extractable by dithionite-citrate (Ald) and ammonium-oxalate (Alox) were not different with depth and had an average value of 3.13 and 2.31 g kg-1 respectively up to 30 cm depth…………………….
Link for e-copy: http://elibrary.narc.gov.np/?r=2107 Phosphorus speciation in nitisol from ethiopian highlands [printed text] / H.R Upadhayay, Author ; S.C França, Author ; P Boeckx, Author . - [s.d.] . - 216-232 p.
in Proceedings of the Second National Soil Fertility Research Workshop, 24-25 March, 2015. Soil Science Division, NARC, Khumaltar, Lalitpur, Nepal / Krishna B. Karki
Languages : English (eng)
Keywords: Inner-sphere complex, phosphorus adsorption capacity (PAC), pool, Sesquioxides. Abstract: Phosphorus (P) is considered as a primary limiting nutrient for faba bean (Vicia faba L.) production in Nitisol (Western and South-western Ethiopian highlands) due to strong adsorption of P to Al and Fe (hydr)oxides. The objective of this research was to differentiate the P into various pools on the basis of its plant availability with respect to different depths. The soil was collected in the bulk as well as at three depths from an agricultural field. A modified Hedley sequential P fractionation was carried out to differentiate phosphorus into different fractions. Sum of all the P fractions [Pt(sum)] ranged from 648 to 1024 mg P kg-1 at 25 and 5 cm depth, respectively. Concentration of Fe in the soils extracted via dithionite-citrate (Fed) ranged from 37 to 41 g kg-1. The amounts of Al extractable by dithionite-citrate (Ald) and ammonium-oxalate (Alox) were not different with depth and had an average value of 3.13 and 2.31 g kg-1 respectively up to 30 cm depth…………………….
Link for e-copy: http://elibrary.narc.gov.np/?r=2107 E-copies
http://nkcs.org.np/narc/dl/?r=2107URLEnhancing maize productivity through the use of split application of phosphorus and potassium in the acid soils of Rampur, Chitawan / Adhikary, Bishnu H.
Title : Enhancing maize productivity through the use of split application of phosphorus and potassium in the acid soils of Rampur, Chitawan Material Type: printed text Authors: Adhikary, Bishnu H., Author ; Babu R. Pandey, Author Publication Date: 2009 General note: In: IAAS Journal 2009, 30:57-62. Languages : English (eng) Keywords: Crop growth and yield parameters; phosphorus potassium application methods; significant effect; increment Zea mays. Abstract: Phosphorus (P) and potassium (K) are the major food elements for the crop growth and grain production of maize (Zea mays L.).Their response to crop production could vary with their application method and times. Split application of P and K increases the efficacy of the given nutrients and thus increased grain yield could be expected in acid soil condition. To evaluate the effects of methods of P and K application , series of experiments were conducted on maize for 3 consecutive years (2005, 2006 and 2007) in the acidic soils ( 4.77 – 5.09 pH) in the farmland of NMRP, Rampur. The experiments were conducted in RCB design with 3 replications in the plot size
of 12 sq.m. The crop was planted in the month of September and harvested in February. The crop growth and production parameters were studied and analyzed statistically. The results revealed that ear height and kernel rows were found statistically affected in the year 2005 and 2006. Similarly, ear length and kernel numbers were affected significantly in the year 2007. Thousand grain weight was also found significantly affected in all years. The highest 1000 grain weight of 457.66 g was recorded in the year 2007 when the crop was supplied with 40 kg P2O5 (half basal and half topdress) and 30 kg K2O (half basal and half top-dress) along with 10 t of compost and 100 kg /ha of nitrogen. Significant effect of treatments was also observed in straw production during the years 2005 and 2006. The highest straw yield (6.33 t /ha) was recorded in the year 2005 when the crop was fertilized by split application of P and basal dose of 30 kg K2O /ha along with 10 t /ha of compost and 100 kg N. The effects of treatments were observed highly significant on the grain production in all years. Three years mean result revealed that highest grain yield (6.16 t /ha) was recorded when the crop was fertilized by 10 t compost plus 100 kg N applied along with 40 kg P2O5 and 30 kg K2O which were applied half as basal and the other half as topdressing, respectively. The highest yield increment (205.5 %) over the control plot was recorded at this level of fertilization and method of P and K application. Farmers are suggested to apply P and K fertilizers half as basal dressing and the other half as topdress in acid soil condition of Chitwan.Enhancing maize productivity through the use of split application of phosphorus and potassium in the acid soils of Rampur, Chitawan [printed text] / Adhikary, Bishnu H., Author ; Babu R. Pandey, Author . - 2009.
In: IAAS Journal 2009, 30:57-62.
Languages : English (eng)
Keywords: Crop growth and yield parameters; phosphorus potassium application methods; significant effect; increment Zea mays. Abstract: Phosphorus (P) and potassium (K) are the major food elements for the crop growth and grain production of maize (Zea mays L.).Their response to crop production could vary with their application method and times. Split application of P and K increases the efficacy of the given nutrients and thus increased grain yield could be expected in acid soil condition. To evaluate the effects of methods of P and K application , series of experiments were conducted on maize for 3 consecutive years (2005, 2006 and 2007) in the acidic soils ( 4.77 – 5.09 pH) in the farmland of NMRP, Rampur. The experiments were conducted in RCB design with 3 replications in the plot size
of 12 sq.m. The crop was planted in the month of September and harvested in February. The crop growth and production parameters were studied and analyzed statistically. The results revealed that ear height and kernel rows were found statistically affected in the year 2005 and 2006. Similarly, ear length and kernel numbers were affected significantly in the year 2007. Thousand grain weight was also found significantly affected in all years. The highest 1000 grain weight of 457.66 g was recorded in the year 2007 when the crop was supplied with 40 kg P2O5 (half basal and half topdress) and 30 kg K2O (half basal and half top-dress) along with 10 t of compost and 100 kg /ha of nitrogen. Significant effect of treatments was also observed in straw production during the years 2005 and 2006. The highest straw yield (6.33 t /ha) was recorded in the year 2005 when the crop was fertilized by split application of P and basal dose of 30 kg K2O /ha along with 10 t /ha of compost and 100 kg N. The effects of treatments were observed highly significant on the grain production in all years. Three years mean result revealed that highest grain yield (6.16 t /ha) was recorded when the crop was fertilized by 10 t compost plus 100 kg N applied along with 40 kg P2O5 and 30 kg K2O which were applied half as basal and the other half as topdressing, respectively. The highest yield increment (205.5 %) over the control plot was recorded at this level of fertilization and method of P and K application. Farmers are suggested to apply P and K fertilizers half as basal dressing and the other half as topdress in acid soil condition of Chitwan.
in Effects of Different Levels of Agricultural-Lime on Brinjal (Solanum Melongena L) Production in Acid Soils / B. H. Adhikary ; C. Adhikary
Title : Dynamics of Nitrogen and Phosphorus Application on Late Season Cauliflower Cultivation Material Type: printed text Authors: P. P. Khatiwada, Author ; S. Piya, Author ; Chaudhary, B.P., Author Pagination: 321-327 p. Languages : English (eng) Keywords: cauliflower, curd yield, nitrogen, phosphorus Abstract: A study to identify an appropriate dose of nitrogen and phosphorus for late season
cauliflower (May production) was accomplished in the upper mid hills of eastem Nepal.
The experiment was conducted during the two consecutive years of 2000 and 2001. Three
level of nitrogen (60, 100 and 140 kg/ha) and the same level ofphosphoms (40, 80 and 120
kglha) were tested to Kibo Giant variety mailllaining a plant spacing of 45x30 em between
and within rows. Application of a minimum level (60:40:50 N: P20 5: K20 kg/Ita) of mineral
fertiliur yielded about a double ( 12.02 t/ha) curd yield titan that of only using compost at a
rate of 30 t/ha (6.77 t/ha). Among the different combinations of Nand P205fertilizers, only
different doses of nitrogen played role on curd yield. Analysis of variance of nitrogen,
phosphorus and their illferaction showed a significant (p<. 001) effect of nitrogen and nonsignificant
effect of different levels ofphosplwrus and their interactions. Nitrogen 140 kg/ha
yielded statistically the highest ( 19.65 t/ha) curd yield, which was followed by 100 kg
nitrogen per hectare ( 16.79 t/ha). There was a positive trend of increased level of nitrogen
(y=10.96+2.9x) belt not a clear trend of phosphorus. Pre and post experiment soil and plant
analysis failed to show significant correlation among N, P20s. K20, pH and OM contellts.
The results have given new direction in relation with fertilizer management for late season
cauliflower cultivation in the upper mid hills of east em Nepal.Link for e-copy: http://elibrary.narc.gov.np/?r=550 Dynamics of Nitrogen and Phosphorus Application on Late Season Cauliflower Cultivation [printed text] / P. P. Khatiwada, Author ; S. Piya, Author ; Chaudhary, B.P., Author . - [s.d.] . - 321-327 p.
in Effects of Different Levels of Agricultural-Lime on Brinjal (Solanum Melongena L) Production in Acid Soils / B. H. Adhikary ; C. Adhikary
Languages : English (eng)
Keywords: cauliflower, curd yield, nitrogen, phosphorus Abstract: A study to identify an appropriate dose of nitrogen and phosphorus for late season
cauliflower (May production) was accomplished in the upper mid hills of eastem Nepal.
The experiment was conducted during the two consecutive years of 2000 and 2001. Three
level of nitrogen (60, 100 and 140 kg/ha) and the same level ofphosphoms (40, 80 and 120
kglha) were tested to Kibo Giant variety mailllaining a plant spacing of 45x30 em between
and within rows. Application of a minimum level (60:40:50 N: P20 5: K20 kg/Ita) of mineral
fertiliur yielded about a double ( 12.02 t/ha) curd yield titan that of only using compost at a
rate of 30 t/ha (6.77 t/ha). Among the different combinations of Nand P205fertilizers, only
different doses of nitrogen played role on curd yield. Analysis of variance of nitrogen,
phosphorus and their illferaction showed a significant (p<. 001) effect of nitrogen and nonsignificant
effect of different levels ofphosplwrus and their interactions. Nitrogen 140 kg/ha
yielded statistically the highest ( 19.65 t/ha) curd yield, which was followed by 100 kg
nitrogen per hectare ( 16.79 t/ha). There was a positive trend of increased level of nitrogen
(y=10.96+2.9x) belt not a clear trend of phosphorus. Pre and post experiment soil and plant
analysis failed to show significant correlation among N, P20s. K20, pH and OM contellts.
The results have given new direction in relation with fertilizer management for late season
cauliflower cultivation in the upper mid hills of east em Nepal.Link for e-copy: http://elibrary.narc.gov.np/?r=550 E-copies
http://nkcs.org.np/narc/dl/?r=550URL
in Proceedings of the Second National Soil Fertility Research Workshop, 24-25 March, 2015. Soil Science Division, NARC, Khumaltar, Lalitpur, Nepal / Krishna B. Karki
Title : Evaluation of soil properties and wheat (Triticumaestivum L.) productivity influenced by nitrogen levels and sowing dates under zero tillage condition in Chitwan, Nepal Material Type: printed text Authors: R.B Mahato, Author ; K.R Pande, Author ; Regmi, A.P., Author Pagination: 53-61 p. Languages : English (eng) Keywords: Chlorophyll value, grain yield nitrogen levels phosphorus uptake sowing dates zero tillage. Abstract: An Experiment was conducted on a farmer field at Torikhet Chitwan, Nepal, during 2011/2012 in order to know the soil properties and wheat productivity influenced by nitrogen levels and sowing dates under zero tillage. The experiment consisted four nitrogen levels (60, 100, 140 and 180 N kg ha-1) and three sowing dates (Nov. 25, Dec. 10 and Dec. 25) and laid out in split plot design. The plant characters, soil physical and chemical properties, yield attributes and yields were significantly influenced by different treatments. The result showed that the highest grain yields (4.84 t ha-1 and 4.97 t ha-1, respectively) were obtained from the crop sown on Nov. 25 and from the application of 140 N kg ha-1. The highest chlorophyll value was recorded on the crop sown on the same Nov.25 and from the application of 140 N kg ha-1. Nitrogen dynamics including total nitrogen uptake, total soil N, residual N and unaccountable N were found highest on the crop sown on Nov. 25 and from the application of 180 N kg ha-1 but was the lowest (30.59 N kg ha-1). The highest total phosphorus uptake, total soil phosphorus, residual phosphorus and unaccountable phosphorus were observed on the crop sown on Nov. 25. The net income were highest (NRs. 49,640 ha-1 and NRs. 52,510 ha-1, respectively) on the crop sown on Nov. 25 and from 140 N kg ha-1.
Link for e-copy: http://elibrary.narc.gov.np/?r=1776 Evaluation of soil properties and wheat (Triticumaestivum L.) productivity influenced by nitrogen levels and sowing dates under zero tillage condition in Chitwan, Nepal [printed text] / R.B Mahato, Author ; K.R Pande, Author ; Regmi, A.P., Author . - [s.d.] . - 53-61 p.
in Proceedings of the Second National Soil Fertility Research Workshop, 24-25 March, 2015. Soil Science Division, NARC, Khumaltar, Lalitpur, Nepal / Krishna B. Karki
Languages : English (eng)
Keywords: Chlorophyll value, grain yield nitrogen levels phosphorus uptake sowing dates zero tillage. Abstract: An Experiment was conducted on a farmer field at Torikhet Chitwan, Nepal, during 2011/2012 in order to know the soil properties and wheat productivity influenced by nitrogen levels and sowing dates under zero tillage. The experiment consisted four nitrogen levels (60, 100, 140 and 180 N kg ha-1) and three sowing dates (Nov. 25, Dec. 10 and Dec. 25) and laid out in split plot design. The plant characters, soil physical and chemical properties, yield attributes and yields were significantly influenced by different treatments. The result showed that the highest grain yields (4.84 t ha-1 and 4.97 t ha-1, respectively) were obtained from the crop sown on Nov. 25 and from the application of 140 N kg ha-1. The highest chlorophyll value was recorded on the crop sown on the same Nov.25 and from the application of 140 N kg ha-1. Nitrogen dynamics including total nitrogen uptake, total soil N, residual N and unaccountable N were found highest on the crop sown on Nov. 25 and from the application of 180 N kg ha-1 but was the lowest (30.59 N kg ha-1). The highest total phosphorus uptake, total soil phosphorus, residual phosphorus and unaccountable phosphorus were observed on the crop sown on Nov. 25. The net income were highest (NRs. 49,640 ha-1 and NRs. 52,510 ha-1, respectively) on the crop sown on Nov. 25 and from 140 N kg ha-1.
Link for e-copy: http://elibrary.narc.gov.np/?r=1776 E-copies
http://nkcs.org.np/narc/dl/?r=1776URL
in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.
Title : Long-term fertility trial for sustainable production of rice-wheat in mid and far western terai Material Type: printed text Authors: Srivastava S.P. ; G Baidhya, Author Pagination: 306-314 p. Languages : English (eng) Keywords: Nitrogen ; Phosphorus Potassium rice wheat Abstract: A long-term fertility trial at RARS Khajura indicates that nitrogen has been the key element
for the production of both rice and wheat in the system since the beginning of this experiment
in 1978179 till 2003104. This beccr"le possible because the soil of the experimental site had
contained higher available native phosphorus (155. 7 kg/ha) and higher available native
potassium (416.8 kglha) as benchmark. It is apparent from the years of study that the effect
ofnitroge!' is more pronounced on the production of rice than on wheat. The grain yield of
rice produced in response to 100 kg Nlha has remained quite comparable with 100: 30: 30
kg NPK/ha up to 26 years (2003104) and significantly higher than 10 ton compost /ha up to
10 years (1987188). However, form 1988189 the grain yield of rice has shown an increasing
trend in response to 1 0-ton compost/ha, which remained quite comparable with 100 kg Nlha
till 1995196 and then increased to a significant level from 1996/97 till 2003104. Also the
beneficial effect of compost is more pronounced on rice than on wheat because of rapid
mineralization during the rice-grol>l'ing season. For sustainable production of wheat nitrogen
alone is not enough. It must be combined with phosphorus tc sustain the yield. The
combination of nitrogen and phosphorus (100:30:0) is more important than that of nitrogen
and potassium (1 00:0: 30) for the grain yield production of wheat. This is because of higher
native potassium content than phosphorus in the soil. However, soil analysis indicates that
both phosphorus and potassium contents of the soil have been declining during the
succeeding years of experimentation. The low input treatments like 50:20:20, 50:0:0 and
50:20:0 have been producing lower yields of rice-wheat and therefore, do not appear to have
a sustainable effect.Link for e-copy: http://elibrary.narc.gov.np/?r=1116 Long-term fertility trial for sustainable production of rice-wheat in mid and far western terai [printed text] / Srivastava S.P. ; G Baidhya, Author . - [s.d.] . - 306-314 p.
in Rice research in Nepal : Proceedings of 24th National Summer Crops Research Workshop, Khumaltar, Lalitpur, 30-31 June 2004 / Adhikari, N.P.
Languages : English (eng)
Keywords: Nitrogen ; Phosphorus Potassium rice wheat Abstract: A long-term fertility trial at RARS Khajura indicates that nitrogen has been the key element
for the production of both rice and wheat in the system since the beginning of this experiment
in 1978179 till 2003104. This beccr"le possible because the soil of the experimental site had
contained higher available native phosphorus (155. 7 kg/ha) and higher available native
potassium (416.8 kglha) as benchmark. It is apparent from the years of study that the effect
ofnitroge!' is more pronounced on the production of rice than on wheat. The grain yield of
rice produced in response to 100 kg Nlha has remained quite comparable with 100: 30: 30
kg NPK/ha up to 26 years (2003104) and significantly higher than 10 ton compost /ha up to
10 years (1987188). However, form 1988189 the grain yield of rice has shown an increasing
trend in response to 1 0-ton compost/ha, which remained quite comparable with 100 kg Nlha
till 1995196 and then increased to a significant level from 1996/97 till 2003104. Also the
beneficial effect of compost is more pronounced on rice than on wheat because of rapid
mineralization during the rice-grol>l'ing season. For sustainable production of wheat nitrogen
alone is not enough. It must be combined with phosphorus tc sustain the yield. The
combination of nitrogen and phosphorus (100:30:0) is more important than that of nitrogen
and potassium (1 00:0: 30) for the grain yield production of wheat. This is because of higher
native potassium content than phosphorus in the soil. However, soil analysis indicates that
both phosphorus and potassium contents of the soil have been declining during the
succeeding years of experimentation. The low input treatments like 50:20:20, 50:0:0 and
50:20:0 have been producing lower yields of rice-wheat and therefore, do not appear to have
a sustainable effect.Link for e-copy: http://elibrary.narc.gov.np/?r=1116 E-copies
http://nkcs.org.np/narc/dl/?r=1116URLResponse of Cauliflower (Brassica oleracea var. Botrytis) to the Application of Boron and Phosphorous in the Soils of Rupandehi District / Dhruba Dhakal in Nepal Agriculture Research Journal, Vol. 9 (2009)
PermalinkPermalinkPermalink
