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neutral or alkaline reaction rice became chlorotic, and that such condi- tion was . growth according to whether ammonium sulphate or calcium nitrate was used as a .. The explanation is not definitely justified by the data at hand because.
Fertilizer-use pattern under the rice–wheat cropping . di-ammonium phosphate for 63 percent of phosphate consumption. Organic manures . Plantation crops.
44 Nutrient Best Management Practices for Rice, Maize, and Wheat The effect of fertiliser type was measured in Ambogo plantation, Oro Province (Trial 309). alone at 3.2 kg/palm; ammonium sulphate (SOA) alone at 4.0 kg/palm; and
Nov 14, 2002 Ammonium sulfate was topdressed on July 12 and 29 and August 6 and .. suggesting the mineralization of native SOM after rice plantation.
Methane emission from rice fields: Wetland rice fields may make a major . plantation crops, livestock, poultry, and fish) are expanding into wetlands. .. to rice in Asia, and ammonium sulfate accounts for approximately 6% (De Datta 1981).
Aug 4, 2009 An explanation of how to perform soil tests and interpret results is available at vt.edu. Liquid fertilizers such as 30-0-0 (urea ammonium nitrate or UAN), . 60 lb N/acre ÷ 0.21 = 286 lb ammonium sulfate/acre.
Apr 19, 2016 Classic inorganic sources such as urea and ammonium sulfate are the . and S that can be advantageous for acid-requiring crops (e.g., rice) and in high-pH soils (while it is . One explanation for the contrasting results is.
Nov 9, 1994 Rice is a very responsive crop to nitrogen fertilizer, but the efficiency of N-15 labelled urea or ammonium sulfate broadcast to flood water of rice. In . Possible explanation of increasing N-uptake by rice due to application of.
Key Words: urea-N, fertilizer efficiency, placement method, wetland rice soil. The Thailand National It is expected that it will be possible to substitute urea for ammonium sulfate as a major. N source for rice as .. A possible explanation for the.
Ammonium sulfate [(NH4)2 SO4] was one of the first and most widely used is present in the ammonium form of ammonium sulfate, rice farmers frequently
Oct 27, 2009 applications to rice paddies or application to the soil surface beneath the .. Ammonia volatilization from urea and diammonium phosphate (DAP) .. contribute to an explanation of why NH3 emission may be low from a soil
Abstract: Flooded rice fields are one of the major biogenic methane sources. nitrogen fertilizers (ammonium sulfate, NH4+-N and potassium nitrate, NO3(-)-N) and with 3.1-3.7-fold in methane emission fluxes due to plantation of Indica rice.
Denitrification is of interest in paddy rice culture because nitrogen-fertilizer . In rice soil where there is sulfate intrusion or ammonium sulfate fertilizers are heavily Betlach, M.R. and Tiedje, J.M. 1981 A kinetic explanation for accumulation.
Ammonium sulfate is an excellent fertilizer for rice; therefore it is of particular . by way of illustration `and explanation only, and not by way of limitation since
Emission from flooded rice fields, enteric fermentation & manure management, efficiency fertilizer application and artificial and participatory woodlot plantation. Adopting ammonium sulphate slightly depresses CH4 although significantly
Good Agricultural Practice for Thai Hom Mali Rice (TAS.4400-2546). National . Plantation area. The land is rai of ammonium sulfate or ammonium chloride.
Sixty percent of the applied N was recovered in the soil and 25% was lost from the plant-soil system by either ammonia volatilization, leaching or denitrification.
Feb 7, 2013 It is estimated that from 700,000 hectares of rice plantation area in . titrated for excess Cr2O2−7 with ferrous ammonium sulphate after cooling.
K. R. Reddy and W. H. Patrick, Jr.2. ABSTRACT. Urea and ammonium sulfate are the most common fertilizer N sources used to topdress rice (Oryza sativa L).
super granules (USG) deep placement increased grain yield of aerobic rice by Keywords: aerobic rice, ammonium sulfate, ammonia, deep placement, urea.
conservation practices will enhance rice productivity in the region. The authors .. In zinc deficient soils, application of zinc sulphate (ZnSO4) @ 25 kg/ha at the final .. crops, plantation crops and lower 1/3 .. Urea Ammonium Phosphate. 28.
Dec 16, 2011 However, the effects of high sulfate levels on rice yields need further study in the . The four treatments employed ammonium phosphate sulfate by the additional urea could be the explanation for this difference, but more
Jan 19, 2015 Furthermore, crops such as rice (Oryza sativa) and sugarcane . of N H 4 + supplied as ammonium sulphate [(NH4)2SO4] (Reaction A below) or from H+ ion A likely explanation for this paradox is that under higher soil pH
GHG emission involve midseason drainage, off-season incorporation of rice straw, substituting urea with ammonium sulphate, replacement of roughage with concentrated feed, use of dome artificial and participatory woodlot plantation.