Effect of long term application of inorganic and organic fertilizers under rice rice wheat system in Bhairahawa, Nepal / Nabin Rawal    

Public ISBD in Proceedings of the 27th National Summer Crops Workshop, held at Rampur, Chitawan, 18-20 April 2013, Vol. I / Giri, Y.P.     Title : Effect of long term application of inorganic and organic fertilizers under rice rice wheat system in Bhairahawa, Nepal Material Type: printed text Authors: Nabin Rawal ; Janmejay Tripathi, Author ; Khim Thapa, Author Pagination: 250-255 p. Languages : English (eng) Keywords: long-term  fertility  ;  rice-rice-wheat  system  inorganic  organic  fertilizers Abstract: A long-tenn soil fertility experiment in rice-rice-wheat system has been conducted since 1978/79 at NWRP, Bhairahawa to evaluate the effect of long term application of fertilizer and manure on soil properties and crop yield of rice and wheat. The experiment was la id out in randomized complete block design with 9 treatments replicated 3 times. From 1990 onwards, periodic modifications have been made in all the treatments splitting the plots in tvto equal halves of 4 x 3 m2 leaving one half as original. In the original treatments, the recent data revealed that the use of FYM @10 t/ha gave significantly higher yield of 3.31 ton/ha in normal rice and the use of chemical fertilizer @I 00:30:30 NPK kg/ha gave significm1tly higher yield of 2.01 ton/ha in the early rice. Similarly, in the modified treatments, the recent data indicated that the use of FYM @ 10 t/ha along with inorganic N and K20 @50 kgha-1 produced significantly highest yield of 4.68 ton/ha in normal rice m1d 2.96 ton/ha in early rice. The control plot with an indigenous nutrient supply still supported rice yield of 920 kglha in normal season after 33rd year completion of rice-rice-wheat system. A sharp decline in rice yields was noted in minus P treatment during recent year in normal season rice whereas in early rice it was almost zero. This shows P is one of the most limiting factors in early rice. The fmdings showed that the productivity of the rice cm1 be increased and sustained by improving nutrient through the integrated use of organic and inorganic manures in long tenn in Nepal. Link for e-copy: http://elibrary.narc.gov.np/?r=905 in Proceedings of the 27th National Summer Crops Workshop, held at Rampur, Chitawan, 18-20 April 2013, Vol. I / Giri, Y.P.     Effect of long term application of inorganic and organic fertilizers under rice rice wheat system in Bhairahawa, Nepal [printed text] / Nabin Rawal ; Janmejay Tripathi, Author ; Khim Thapa, Author . - [s.d.] . - 250-255 p. Languages : English (eng) Keywords: long-term  fertility  ;  rice-rice-wheat  system  inorganic  organic  fertilizers Abstract: A long-tenn soil fertility experiment in rice-rice-wheat system has been conducted since 1978/79 at NWRP, Bhairahawa to evaluate the effect of long term application of fertilizer and manure on soil properties and crop yield of rice and wheat. The experiment was la id out in randomized complete block design with 9 treatments replicated 3 times. From 1990 onwards, periodic modifications have been made in all the treatments splitting the plots in tvto equal halves of 4 x 3 m2 leaving one half as original. In the original treatments, the recent data revealed that the use of FYM @10 t/ha gave significantly higher yield of 3.31 ton/ha in normal rice and the use of chemical fertilizer @I 00:30:30 NPK kg/ha gave significm1tly higher yield of 2.01 ton/ha in the early rice. Similarly, in the modified treatments, the recent data indicated that the use of FYM @ 10 t/ha along with inorganic N and K20 @50 kgha-1 produced significantly highest yield of 4.68 ton/ha in normal rice m1d 2.96 ton/ha in early rice. The control plot with an indigenous nutrient supply still supported rice yield of 920 kglha in normal season after 33rd year completion of rice-rice-wheat system. A sharp decline in rice yields was noted in minus P treatment during recent year in normal season rice whereas in early rice it was almost zero. This shows P is one of the most limiting factors in early rice. The fmdings showed that the productivity of the rice cm1 be increased and sustained by improving nutrient through the integrated use of organic and inorganic manures in long tenn in Nepal. Link for e-copy: http://elibrary.narc.gov.np/?r=905

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Wheat Yield Trend and Soil Fertility Status in Long Term Rice-Rice-Wheat Cropping System / Nabin Rawal in Journal of Nepal Agricultural Research Council, Vol.1 (August 2015)  

Public ISBD [article]  inJournal of Nepal Agricultural Research Council > Vol.1 (August 2015) . - 21-28 p. Title : Wheat Yield Trend and Soil Fertility Status in Long Term Rice-Rice-Wheat Cropping System Material Type: printed text Authors: Nabin Rawal, Author ; Devraj Chalise, Author ; Janmejai Tripathi, Author ; K. Khadka, Author ; Khim Thapa, Author Publication Date: 2015 Article on page: 21-28 p. Languages : English (eng) Keywords: FYM,  inorganic,  Long  term,  organic  and  Rice-rice-wheat Abstract: A long-term soil fertility experiment under rice-rice-wheat system was performed to evaluate the long term effects of inorganic fertilizer and manure applications on soil properties and grain yield of wheat. The experiment began since 1978 was laid out in randomized complete block design with 9 treatments replicated 3 times. From 1990 onwards, periodic modifications have been made in all the treatments splitting the plots in two equal halves of 4 x 3 m2 leaving one half as original. In the original treatments, recent data revealed that the use of Farm Yard Manure (FYM) @10 t ha-1 gave significantly (P≤0.05) higher yield of 2.3 t ha-1 in wheat, whereas control plot gave the lowest grain yield of 277 kg ha-1. Similarly, in the modified treatments, the use of FYM @10 t ha-1 along with inorganic Nitrogen (N) and Potassium oxide (K2O) @ 50 kg ha-1 produced significantly (P≤0.05) the highest yield of 2.4 t/ha in wheat. The control plot with an indigenous nutrient supply only produced wheat yield of 277 kg ha-1 after 35th year completion of rice-rice-wheat system. A sharp decline in wheat yields was noted in minus N, phosphorus (P), Potassium (K) treatments during recent years. Yields were consistently higher in the N:P2O5:K2O and FYM treatments than in treatments, where one or more nutrients were lacking. The application of P2O5 and K2O caused a partial recovery of yield in P and K deficient plots. There was significant (P≤0.05) effect of use of chemical fertilizers and manure on soil properties. The soil analysis data showed an improvement in soil pH (7.8), soil organic matter (4.1%), total N content (0.16%), available P (503.5 kg P2O5 ha-1) and exchangeable K (137.5 kg K2O ha-1) in FYM applied treatments over all other treatments. The findings showed that the productivity of the wheat can be increased and sustained by improving nutrient through the integrated use of organic and inorganic manures in long term. Link for e-copy: http://elibrary.narc.gov.np/?r=1316 [article] Wheat Yield Trend and Soil Fertility Status in Long Term Rice-Rice-Wheat Cropping System [printed text] / Nabin Rawal, Author ; Devraj Chalise, Author ; Janmejai Tripathi, Author ; K. Khadka, Author ; Khim Thapa, Author . - 2015 . - 21-28 p. Languages : English (eng) in Journal of Nepal Agricultural Research Council > Vol.1 (August 2015) . - 21-28 p. Keywords: FYM,  inorganic,  Long  term,  organic  and  Rice-rice-wheat Abstract: A long-term soil fertility experiment under rice-rice-wheat system was performed to evaluate the long term effects of inorganic fertilizer and manure applications on soil properties and grain yield of wheat. The experiment began since 1978 was laid out in randomized complete block design with 9 treatments replicated 3 times. From 1990 onwards, periodic modifications have been made in all the treatments splitting the plots in two equal halves of 4 x 3 m2 leaving one half as original. In the original treatments, recent data revealed that the use of Farm Yard Manure (FYM) @10 t ha-1 gave significantly (P≤0.05) higher yield of 2.3 t ha-1 in wheat, whereas control plot gave the lowest grain yield of 277 kg ha-1. Similarly, in the modified treatments, the use of FYM @10 t ha-1 along with inorganic Nitrogen (N) and Potassium oxide (K2O) @ 50 kg ha-1 produced significantly (P≤0.05) the highest yield of 2.4 t/ha in wheat. The control plot with an indigenous nutrient supply only produced wheat yield of 277 kg ha-1 after 35th year completion of rice-rice-wheat system. A sharp decline in wheat yields was noted in minus N, phosphorus (P), Potassium (K) treatments during recent years. Yields were consistently higher in the N:P2O5:K2O and FYM treatments than in treatments, where one or more nutrients were lacking. The application of P2O5 and K2O caused a partial recovery of yield in P and K deficient plots. There was significant (P≤0.05) effect of use of chemical fertilizers and manure on soil properties. The soil analysis data showed an improvement in soil pH (7.8), soil organic matter (4.1%), total N content (0.16%), available P (503.5 kg P2O5 ha-1) and exchangeable K (137.5 kg K2O ha-1) in FYM applied treatments over all other treatments. The findings showed that the productivity of the wheat can be increased and sustained by improving nutrient through the integrated use of organic and inorganic manures in long term. Link for e-copy: http://elibrary.narc.gov.np/?r=1316