Late and heavy dose of nitrogen at panicle initiation more especially at booting stage, increases the protein content. Apply N and K as 25% each at 21 DAS, at active tillering, PI and heading stages. In DDSR system rice crop does not require continuous flooding and can be safely irrigated. The drill can place fertilizer at a depth of 8 cm from the surface of the puddled soil and can cover 0.3 hectare area in one hour time. Entire amount of P and K fertilizers was applied as basal dose both in Chili and T. aman rice at the time of final land preparation. 8:       What is a good quality rice seed? In all parts of the country, rice crop is established by transplanting 30-35 days old   nursery. As we know that nitrogen is required by plants up to flowering stage and nitrogen is leached down after it is dissolved in water, we can try to reduce its solubility in water. recommended fertilizer dose for HYVs, hybrid rice, aromatic rice, semi deep and deep water rice were conducted. By nature, maximum amount of phosphorus can be fixed in the soil which will be released gradually. The prevalence of Helminthosporium disease in potash deficient rice crop serves as an example. Grain must be containing 20-22% moisture at the time of paddy-crop harvesting. For 100 kg urea, 30 kg well-powdered neem cake and about 1 litre of kerosene oil is required. You need JavaScript enabled to view it. Potash prevents lodging by providing mechanical strength to the plant and strengthens the defence mechanism of the plant against certain diseases. Both of the main crop and ratoon crop were aff ected by fertilizer doses (Table 1). 2. Such variations are largely due to the interaction among various factors which influence the nitrogen- use efficiency by rice crop. //-->\n Subsequent irrigations may be given in 4-5 days intervals to keep the field saturated up to 40 days. Sometimes scorching or burning of .tips and margins of the leaves is observed. It is therefore, imperative to adopt integrated approach for the management of these pests and achieve sustainable crop production and environmental protection. The mealy bugs occur periodically in Sindh. about 10-15 days after transplanting for early varieties and 20-25 days after transplanting for medium duration rice varieties. Urea is spread in a thin layer. By Muhammad SHAMIUL ISLAM, Mirza HASANUZZAMAN and Md. ROKONUZZAMAN. Potash is applied as a basal dose in rice crop. Moreover, as these are spread on the soil surface, gaseous loss due to photodecomposition (decomposition of nutrient due to sun light) will be greater. Pests can be managed by logical integration of various tactics like use of resistant varieties, modifications of pest environment (removal of alternate food sources, timely sowing, water management (AWD) and manipulation of biodiversity in agri-matrix), conservation and utilization of bio-control agents (parasitoids, predators etc), balanced use of fertilizers and when necessary, an appropriate and timely use of insecticides. Proper timing of the fertilizer application increases yields, reduces nutrient losses, increases nutrient use efficiency and prevents damage to the environment. Nitrogenous fertilizers play a major role in the increase of rice yields. Ans:     Weeds are a major concern for high productivity in this new rice cultivation system. This research elucidates the efficacy of different fertilizers’ application on growth attributes, yield potential, and grain quality of rice. Spread this mixture in the field before transplanting rice. 6 No. In this case water should not be allowed to go out of the field at least for 24 hours. The whole amount of phosphorus and potash should be mixed in the soil after puddling. 3. One flower does not make a garland and, as such, only one nutrient cannot give a good yield. 8. The main sources of potash used in India are muriate of potash and sulphate of potash only. Ans:     Rice soils have been exhausted by continuous cultivation of rice and wheat and have become deficient in organic matter. j. 10 10) proves better at dose 200 kg than fertilizer N-P-K (23 10 05) at the same dose. QQ: 1659387397 Ratoon Rice Response to Different Fertilizer Doses in Irrigated Condition . Reduced Dosage. — New rice fertilizer recommendations designed to make decisions easier for producers have been released for the current crop. In prolonged deficiency the patches increase in number, spread and coalesce forming large irregular lesions which later form interveinal chlorotic stripping. Under prolonged deficiency, yellow coloured portions in between the viens of leaves, called interveinal chlorosis, are observed on the middle leaves and the veins look green in colour. Then it is mixed with kerosene oil thoroughly. Actually, A rice variety which yields 60 quintals of grains and 90 quintals of straw from one hectare, requires, At per the market rates of 1990, one kg of nitrogen costs Rs. Fertilizer Management in Low Land Condition. In this study, a pot experiment was designed to elucidate the effect of varying dosages of silicon (Si) fertilizer application in Si-deficient and enriched paddy soils on rice phytolith and carbon (C) bio-sequestration within phytoliths (PhytOC). 10. When field comes in “wattar” conditions (optimum soil moisture level), prepare the fine seedbed by applying 1-2 shallow cultivations either with tractor or bullocks followed by light planking. The amount of nitrogen can be applied in two split doses. Therefore, for efficient use, drilling of fertilizer in lines at plough depth (6 inches) is recommended. The   incidence of pests varies from one region to other: Leaffolder is predominant all over the rice growing areas, stem borers are predominant in Punjab and D. I. Khan areas, whitebacked planthopper in Sindh and Baluchistan and grasshoppers in Swat areas. Fertilizer use is low in AEZs 10, 11 and 12 because the soils are susceptible to severe water erosion and experience partial waterlogging. 4. The response of different fertilizer doses was studied on the ratoon crop as well as main crop. A fine patch of green and chlorotic cells appears at some distance away from the basal part of the third leaf. The roots become sparse and brown in colour. For good growth and yield the use of appropriate doses of fertilisers will significantly improve the yield of rice. Late application does not increase tillering, but increases grain yield by producing heavier panicles. This study aims to investigate hybrid rice response to different nitrogen fertilizer levels and the timing of application and quantify hybrid rice nitrogen use efficiency. Therefore, the whole amount of recommended phosphorus is given to crops either at final phoughing or mixed with the seed which is to be used for sowing. phosphorus is applied at the rate of half of the nitrogen dose. The remaining 90% seed is produced by the farmers themselves. Soils with poor fertility status obviously require higher doses of nitrogen as compared to rich fertile soils. 3. K. In case of an incidence of bacterial leaf blight disease, (which is usually related to high dose of nitrogen) it should be given in more split doses and in less amount. 1/4th at transplanting, 1/4th at tillering, 1/4th at panicle initiation and remaining at head appearance of ears. Fertilizer Management in Low Land Rice. Ans:     The best planting time for DDSR cultivation 20-25 days earlier than the traditional paddy transplanting period. 1. Thus, the use of fertilizers at the proper doses is necessary for fighting against rice blast. 2. Farmers must always use drill for sowing the rice crop to get the optimum crop germination and having the desired stand establishment of the crop. The visible deficiency symptoms of nitrogen, phosphorus, potassium, iron, manganese, zinc and copper in rice crop are the following. Calculate how much DAP, Urea & MOP will be required for this. Direct dry seeding of rice is a new rice cultivation method in which rice is seeded directly into moist “wattar” soil conditions like winter wheat by using seed drill. In vegetative stage phosphorus is absorbed during tillering stage. After filtering, the solutions are mixed and 240 litres of water is added. The first top dressing should be given at tillering stage i.e. Still some amount of potash is to be applied for getting good yield as only 1-2% of total potash is readily available. For some rice cultivars, particularly in years with favorable climate, fixed date adjustable dose N management produced yield levels higher than those achieved by applying blanket recommendation for fertilizer N and resulted in agronomic efficiency higher than 25 kg grain/kg N. Experiments show that the minimum required amount of nitrogen to be applied varies from 0.5 kg to 1.5 kg and the maximum amount varies from 2.7 kg to 5.9 kg per 100 kg of rice. • N-fertilizer substitution: Basal application of FYM at 5 t ha-1 in conjunction with two top dressings of green foli age of Glyricidea maculata at AT and PI stages at 2.5 t ha-1 resulted in 1 t ha of more grain yield over control. Familiarity with the most common visual deficiency symptoms of nutrients in rice crop is also essential for proper fertilizer management. b. 4. In general, Indian soils are high in potash content. Irrigate on the third day of the application of fertilizer. The symptoms appear two weeks after transplanting. Amount of nitrogen for one top dressing should not be more than 20-30 kg/ha at a time. 2.5 dan 3.75 g KCl/plants, Factor 2 paklobutrazol dose that is 0, 0.0625, 0.125 dan 0.1875 g/l water. All Phosphorus (P) and Potash (K) and 1/3rd of the Nitrogen (N) should be applied at the time of land preparation. 20 to 25 days before flowering or 60 to 65 days after transplanting. Urea is preferred because it has a high nitrogen content easily soluble in water, easily available and is less costly compared with other nitrogenous fertilisers and does not leave any adverse effect on plant leaves. Factors like variety, climatic conditions, soil type, fertility and age of seedlings affect the nitrogen use efficiency. An experiment was conducted at RARS, Khajura during rainy season of 2014 to evaluate the response of black rice with different doses of fertilizers and to document the basic phonological characters. One kilogram of zinc sulphate and one kilogram of lime are dissolved in 5 litres of water, each in separate containers. Fertilizer-use pattern under the rice–wheat cropping system in the Indo-Gangetic Plains 30 15. Q7: What is fertilizer dose to be applied in Direct Dry rice cultivation system? Maximum retail prices of fertilizers, by product 33 16. It is a very easy and effective method of applying urea under dry land conditions. In moderate deficiency, mild and interveinal chlorosis appears. In rice cultivation, fertilizers represent about 19 % of production costs; however, proper fertilization management helps increase performance and could reduce production costs (Reza, Corteza, Hamidreza, Salman and Alireza, 2012). If deficiency of potassium occurs during flowering or just before. Ratoon Rice Response to Different Fertilizer Doses in Irrigated Condition. Then use the Rabi drill to seeding the crop in well prepared and leveled field at optimum soil-moisture conditions.Broadcasting of the seeds is not recommended. Ratoon Rice Response to Different Fertilizer Doses in Irrigated Condition 199 Th e mean diff erences were adjudged by Duncan’s Multiple Range Test (DMRT). Applying fertilizers at the wrong time may result in nutrient losses, a waste of fertilizer and even damage to the crop. • For balanced rice nutrition, dose rates between 150 and 200 kg/ha of Polysulphate are suitable to complement current fertilization plans. The last top dressing should be given at panicle initiation stage i.e. These losses can be reduced to the minimum by adopting proper management practices of fertilizer application in low land rice cultivation. In addition, Alfandi (2006) stated that application of half dose N fertilizer at planting time will affect vegetative phase growth of crop, especially plant height and tillers development. While, 80 per cent of the recommended dose of Nitrogen (2.0-2.5 bags Urea for Basmati & 2.5-3.0 bags for non-basmati) should be applied between 30-70 days after sowing of rice. Q4:       What is the optimum time for DDSR system? Neem coated urea should be applied to the field as early as possible before transplanting the rice. In the case of high rainfall areas or areas having sandy soil, nitrogen should be given four split doses i.e. Results and discussion Plant height Th e plant height was signifi cantly infl uenced by the fer-tilizer dose. The cost-benefit ratio should be 1:2 as a criterion to determine the optimum dose, i.e. In the rabi season, response is more because of the availability of sunshine resulting in greater photosynthesis. Then, 30-35 days after sowing, when maximum weeds appear, post-emergence herbicides like, Clover (Bispyrbac Sodium) and Pyranex Gold 30% WDG can be used for effective control of weeds. As this solution is very dilute, the droplets do not stick to leaves bur drop down to the soil. Well rotten farmyard manure or compost can be applied at the rate of 6-10 tonnes per hectare, one to one and half months before sowing. Classification of rice plant fertilizer needs based on leaf color chart using radial basis function neural network To cite this article: R F Rahmat et al 2018 J.