Effect of Coated and Uncoated Urea on the Carry-over of Nitrogen from Jute to Paddy Rice in the Humid Sub-tropics

1989 ◽  
Vol 25 (2) ◽  
pp. 177-179
Author(s):  
Apurba Sarkar
Keyword(s):  
Grain Yield ◽  
Ammonium Sulphate ◽  
Dry Matter ◽  
Fertilizer Application ◽  
Paddy Rice ◽  
Neem Cake ◽  
Left Behind ◽  
Neem Cake Coated Urea ◽  
Coated Urea ◽  
Carry Over

SUMMARYPaddy rice was grown without fertilizer after jute which had been supplied with nitrogen as neem cake coated urea (NCU), wax coated urea (WCU), ammonium sulphate or standard urea at rates of 0, 40, 80 or 120 kg N ha−1. NCU or WCU applied to jute increased the dry matter and grain yield of the rice, suggesting that enough nitrogen is left behind to grow a subsequent rice crop without further fertilizer application.

Coated and Uncoated Urea in Ramie Leaf Production

1984 ◽  
Vol 20 (3) ◽  
pp. 245-249 ◽  
Author(s):  
Apurba Sarkar ◽  
Gitasree Sarkar ◽  
Anupam Sarkar
Keyword(s):  
Dry Matter ◽  
The Other ◽  
Dry Matter Yield ◽  
Fresh Weight ◽  
Bast Fibre ◽  
Leaf Production ◽  
Neem Cake ◽  
Residual Nitrogen ◽  
Neem Cake Coated Urea ◽  
Coated Urea

SUMMARYRamie (Boehmeria nivea Gaud.), which can provide fodder in addition to bast fibre, was supplied with nitrogen in three different forms: as neem cake coated urea (NCU), lac coated urea (LCU) and standard urea, at rates of 60, 120, 180, 240 and 300 kg N ha−1 annually in four equal applications. The ramie was cut four times a year for two years. NCU increased fresh weight, leaf dry matter yield and leaf protein at almost every cutting compared with the other forms of nitrogen, and there was an indication of increased residual nitrogen in the soil. Leaf dry matter and protein content increased with increasing levels of nitrogen up to 180 kg ha−1. It is suggested that coating urea with neem cake makes it a better source of nitrogen for ramie leaf production.

Effect of green manuring, blue-green algae and neem-cake-coated urea on wetland rice (Oryza sativa L.)

1990 ◽  
Vol 9 (3) ◽  
pp. 235-238 ◽  
Author(s):  
S. Singh ◽  
R. Prasad ◽  
B. V. Singh ◽  
S. K. Goyal ◽  
S. N. Sharma
Keyword(s):  
Oryza Sativa ◽  
Green Algae ◽  
Oryza Sativa L ◽  
Wetland Rice ◽  
Green Manuring ◽  
Blue Green Algae ◽  
Neem Cake ◽  
Neem Cake Coated Urea ◽  
Coated Urea

scholarly journals Influence of Biodegradable Polymer Coated Urea on Nitrogen Uptake and Utilization of Maize (Zea mays L)

2021 ◽  
pp. 297-306
Author(s):  
B. Balaganesh ◽  
P. Malarvizhi ◽  
N. Chandra Sekaran ◽  
P. Jeyakumar ◽  
K. R. Latha ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Uptake ◽  
Nitrogen Use Efficiency ◽  
Biodegradable Polymer ◽  
Dry Matter ◽  
Nitrogen Use ◽  
Urea Fertilizer ◽  
Coated Urea ◽  
Use Efficiency ◽  
Polymer Coated Urea

Controlled release nitrogen fertilizers could be an excellent management approach for improving nitrogen fertilizer efficiency. The present study aimed to investigate the effect of coated urea fertilizers to increase nitrogen uptake and utilization of maize. The nitrogen use efficiency of maize from various biodegradable polymer-coated urea fertilizers, such as palm stearin coated urea (PSCU), pine oleoresin coated urea (POCU), and humic acid coated urea (HACU), was determined in a pot culture experiment conducted at the Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, during 2021. The coating materials have been coated on urea with different coating thicknesses, viz., PSCU - 5, 10, 15%, POCU – 2, 4, 6%, and HACU - 5, 10, 15%. Among all the treatments, T11: HACU 15% produced highest grain yield (72.0g plant-1) followed by T7: POCU 4% (69.7 g plant-1) and T4: PSCU 10% (69.0g plant-1). In terms of dry matter production, T10: PSCU 10% produced maximum dry matter (186.5g plant-1), followed by T11: HACU 15% (186.2 g plant-1), and T7: POCU 4% (185.3g plant-1). The nitrogen uptake by the maize plant was higher in T7: POCU 4 % (1.62g plant-1), followed by T11: HACU 15% (1.59 g plant-1) and T4: PSCU 10% (1.59g plant-1). Irrespective of treatments, the highest nitrogen utilization by the maize crop was found in T7: POCU 4% (73.9%) followed by T4: PSCU 10% (71.1%) and T11: HACU 15% (70.9%) treatments. When compared to uncoated urea fertilizer, all coated urea fertilizers outperformed uncoated urea fertilizer in terms of grain yield, dry matter accumulation, and nitrogen uptake. To improve the nitrogen use efficiency, coated urea fertilizers prove to be a promising alternative to uncoated urea fertilizers.

Excess soil nitrogen and the yield and uptake of nitrogen by wheat in southern New South Wales

1965 ◽  
Vol 5 (18) ◽  
pp. 317 ◽  
Author(s):  
RR Storrier
Keyword(s):  
Grain Yield ◽  
Soil Nitrogen ◽  
Dry Matter ◽  
New South ◽  
New South Wales ◽  
Fertilizer Application ◽  
Mineral Nitrogen ◽  
Grain Number ◽  
South Wales ◽  
Ear Number

Ammonium sulphate was added at rates up to 150 lb nitrogen an acre to a soil containing 149 lb mineral nitrogen per acre-18 Inches at sowing, and the seasonal distribution of mineral nitrogen in the soil, nitrogen uptake, and yield of wheat was measured in a better than average season. Some of the applied fertilizer, at all rates of application, was taken up by the crop and resulted in increased dry matter yield and plant nitrogen content at jointing. However, at harvest, total dry matter and grain yield were depressed at all levels of fertilizer application. Grain yield was depressed from 40.5 to 30.5 bushels an acre with the addition of 150 lb nitrogen an acre.Yield potential, as represented by tiller production and spikelets per ear, was increased by fertilizer application, but ear number, grains per ear, and weight per grain, were depressed. Grain number per ear was the principle component of yield under the experimental conditions. Moisture stress and competition for light were responsible for an increase in tiller mortality, which resulted in the depression in ear number with increasing nitrogen supply. Inter-tiller competition for available moisture during the pre-anthesis period caused a decrease in grain number per ear, from 19.3 in the control to 16.6 at the maximum fertilizer rate. It is suggested that inter-tiller competition for available moisture during the pre-anthesis period is an important factor in determining potential grain yield in wheat grown on high fertility soils in southern New South Wales.

Growth, water use and yield of barley in Mediterranean-type environments

1987 ◽  
Vol 108 (2) ◽  
pp. 365-378 ◽  
Author(s):  
K. D. Shepherd ◽  
P. J. M. Cooper ◽  
A. Y. Allan ◽  
D. S. H. Drennan ◽  
J. D. H. Keatinge
Keyword(s):  
Grain Yield ◽  
Water Use ◽  
Dry Matter ◽  
Simulation Models ◽  
Fertilizer Application ◽  
Kernel Weight ◽  
Future Research ◽  
Dry Matter Yield ◽  
Linear Relationships ◽  
Crop Development

SummaryRelations between yield, water use and pre-anthesis growth were analysed for cropsof barley grown for three seasons at several sites in northern Syria. The relations obtained were compared with those for other cereal crops grown in similar regions of Mediterranean climates.Phosphorus fertilizer application increased the rate of crop development from emergence to floral initiation and advanced anthesis by up to 11 days. Grain and total shoot dry-matter yields were increased by fertilizer (nitrogen + phosphorus) applications at all sites in all years, in most cases without increasing total evapotranspiration. The increased dry matter at anthesis was produced without having used a larger proportion of the total evapotranspiration in the whole season. Consequently, the ratio of grain yield to total above-ground dry-matter yield (harvest index) and kernel weight were also relatively stable between sites and years, despite some very low amounts of post-anthesis water use. Grain yield appeared to be largely determined by anthesis and there were strong linear relationships between grain yield or total dry-matter yield and number of kernels. Differences in water use efficiency of crops given fertilizer between sites and years were closely related to the differences in amounts of winter growth.Some responses differed from those predicted from models of growth, water use and yield developed in other regions with similar climates. It is concluded that agronomists and breeders should increase amounts of early growth thereby increasing grain and dry-matter yields. Future research emphasis should also be on the development of dynamic simulation models of pre-anthesis growth and water use.

The effect of wet season land treatment and nitrogen fertilizer on safflower, linseed, and wheat in the Ord River valley. 3. Wheat

1968 ◽  
Vol 8 (30) ◽  
pp. 72 ◽  
Author(s):  
DF Beech ◽  
MJT Norman ◽  
GA McIntyre
Keyword(s):  
Grain Yield ◽  
Ammonium Sulphate ◽  
Nitrogen Fertilizer ◽  
Dry Matter ◽  
Nitrate Nitrogen ◽  
Yield Response ◽  
Research Station ◽  
Soil Nitrate ◽  
Dry Matter Yield ◽  
Wet Season

Gabo wheat was grown under irrigation at Kimberley Research Station in the 1964 dry season following 6 months and 18 months clean and weedy fallows. Four levels of nitrogen fertilizer, as ammonium sulphate and urea, were superimposed. After 6 months clean fallow and 6 and 18 months weedy fallows, grain and dry-matter yield responded to up to 160 lb N an acre. Grain and dry-matter yield after 6 months clean fallow were greater than those after weedy fallows at the same nitrogen fertilizer level. After 18 months clean fallow no significant responses to nitrogen fertilizer were obtained. Mitscherlich curves were fitted to the total dry-matter and grain yield responses to nitrogen fertilizer after the four fallowing treatments. The analysis indicated that 1 part of nitrogen as ammonium sulphate was equivalent to 1.61 (dry matter) or 1.72 (grain) parts of nitrogen as urea. There were strong correlations (r = 0.956 for dry matter; r = 0.917 for grain) between the Mitscherlich constants for individual replicates of the fallow treatments and soil nitrate-nitrogen measured in the 0-3 foot profile before sowing. Soil nitrate-nitrogen, mineralized and accumulated during a summer clean fallow, appears to be almost three times as effective in producing a grain yield response as nitrogen applied as ammonium sulphate at sowing, and almost five times as effective as urea nitrogen at sowing.

Fertilizer–use efficiency of amended urea materials in flooded rice

1989 ◽  
Vol 112 (2) ◽  
pp. 277-281 ◽  
Author(s):  
H. S. Chauhan ◽  
B. Mishra
Keyword(s):  
N Uptake ◽  
Deep Placement ◽  
Fertilizer Use ◽  
Urea Supergranules ◽  
Neem Cake ◽  
Prilled Urea ◽  
Matter Production ◽  
Neem Cake Coated Urea ◽  
Coated Urea ◽  
Use Efficiency

summaryIn a field experiment on a typic hapludoll in 1983 and 1984, deep placement of urea supergranules at 40 and 80 kg N/ha proved to be the best N source, of five tested, for grain production, but at 120 kg N/ha it was similar to neem-cake-coated urea. The results showed that deep placement of urea supergranules can save fertilizer use by 60% compared with prilled urea to obtain the same yield. Shellac-coated urea and dicyandiamide-coated urea was more effective than prilled urea in 1984. Differences in dry-matter production and grain yield were directly related to N uptake by the plants. On average, apparent recovery of applied N increased from 35% for prilled urea to 55, 52·5,46·5 and 37·5% for urea supergranules, neem-cake-coated urea, shellac-coated urea and dicyandiamide-coated urea, respectively.

Effect of Sunflower Residues and Herbicide on Weed Suppression, Grain Yield and Economics of Transplanted Aman Rice

2020 ◽  
Vol 23 (1) ◽  
pp. 47-58
Author(s):  
SS Tanu ◽  
P Biswas ◽  
S Ahmed ◽  
SC Samanta
Keyword(s):  
Grain Yield ◽  
Dry Matter ◽  
Block Design ◽  
Weed Suppression ◽  
Cost Ratio ◽  
Gross Margin ◽  
Weed Density ◽  
Benefit Cost Ratio ◽  
Hand Weeding ◽  
Environmentally Sound

A field experiment was conducted at Agronomy Field Laboratory, Patuakhali Science and Technology University, Dumki, Patuakhali from July 2018 to November 2018 to evaluate the effect of sunflower residues and herbicides on the yield and economic performance of transplanted Aman rice. Weed control methods tested were T1 = weedy check (Unweeded control), T2 = Weed-free check by hand weeding twice, T3 = Pendimethalin, T4 = Pretilachlor, T5 = Butachlor, T6 = Pyrazosulfuron ethyl, T7 = Bensulfuron methyl + Acetachlor, T8 = Bispyriback sodium, T9 = 2,4-D amine, T10 = MCPA, T11 = Sunflower residues, T12 = Sunflower residues + 100% Pyrazosulfuron ethyl, T13 = Sunflower residues + 75% Pyrazosulfuron ethyl, T14 = Sunflower residues + 50% Pyrazosulfuron ethyl. The experiment was laid out in a randomized complete block design with fourteen treatments replicated thrice. Weedy check registered significantly the highest total weed density (354.67 m-2) and total weed dry matter (51.81 g-2) while weed-free treatment by hand weeding twice recorded significantly the lowest total weed density (6.67 m-2) and total weed dry matter 0.49 g-2) . Weedy check produced the highest weed index (34.24%) and hand weeding produced the lowest. Among different herbicides applied alone, butachlor had the lowest total weed density (15 m-2) and total weed dry matter (6.43 g-2) after hand weeding. Hand weeding recorded the highest grain yield (5.14 t ha-1) which was statistically similar to pendimethalin, pretilachlor, butachlor, bensulfuron methyl + acetachlor and sunflower residues + 100% pyrazosulfuron ethyl. Higher grain yield was attributed to a higher number of panicle m-2, number of filled grains panicle-1 and 1000-grain weight. The highest gross margin (22955 Tk. ha-1) and benefit-cost ratio (1.32) were obtained from butachlor. Integration of sunflower residues with pyrazosulfuron ethyl produced effective weed suppression and satisfactory yield comparable to butachlor. Although the integration is less profitable than butachlor the farmers can use this technology as a feasible and environmentally sound approach in transplanted Aman rice field. Bangladesh Agron. J. 2020, 23(1): 47-58

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