A field experiment was conducted during rabi season of 2015-16 at Agriculture Farm, Institute of ... more A field experiment was conducted during rabi season of 2015-16 at Agriculture Farm, Institute of Agriculture, Visva-Bharati, Sriniketan, West Bengal on lateritic soil condition to study the growth and yield of chickpea(Cicer arietinum L.) as influenced by irrigation scheduling and zinc application. The experiment was conducted at split plot design having 5 main plot treatments (I1: irrigation at pre flowering, I2: irrigation at branching + pod development, I3: irrigation at branching + pre flowering, I4: irrigation at branching + pre flowering + pod development, I5: irrigation at 0.8 bar soil moisture tension) and 3 sub plot treatments viz. Zn0: control, Zn1: zinc sulphate @ 0.25%, Zn2: zinc sulphate @ 0.5%. The results of the experiment revealed that treatment I4 (i.e. irrigation at branching + pre flowering + pod development) and Zn2 (0.5% zinc sulphate) recorded highest plant height (43.28 cm), no of branches plant-1 (5.85), dry matter accumulation (231.33 g m-2), leaf area index...
Rice is grown mostly through transplanting in India, in spite of the fact that transplanting is c... more Rice is grown mostly through transplanting in India, in spite of the fact that transplanting is cumbersome practice and requires more labour. The inadequacy of irrigation water and scarce labour coupled with higher wages during the peak period of farm operations, invariably lead to delay in transplanting. To overcome this problem, farmers are gradually switching over to direct seeding under puddle condition. Wet seeding (Sowing pre-germinated seed on to puddle soil) reduces substantially the amount of labour needed for growing of rice crop. The wet seeding also helps to harvest the crop by 8- 10 days earlier than transplanting. It eliminates the use of seedlings and operations such as nursery preparation care of seedlings, pulling, bundling, transporting and transplanting .The demand for more irrigation water and seed rate with transplanting and direct sowing methods signifies the importance of the other methods of rice crop establishment such as system of rice intensification (SRI) to save water. With proper water and weed management under SRI and wet sowing we can get similar yields as that of transplanted rice. An attempt has been made in this paper to review the effect of establishment methods on rice crop yield.
Although weeds causes serious yield losses in agriculture, many studies have been conducted on th... more Although weeds causes serious yield losses in agriculture, many studies have been conducted on the relationship between weeds and yield loss in direct seeded rice. Major weeds found in Chhattisgarh plains are Echinochloa colona, Echinochloa crus-galli, Ischaemum rugosum, Oryza sativa (weedy rice), Leptochloa chinensis, Paspalum distichum among the grasses. Cyperus iria, Cyperus difformis, Cyperus rotundus, Fimbristylis miliacea among the sedges and Monochoria veginalis, Eclipta prostrate, Commelina benghalensis, Cynotis axillaris, Ceasulia axillaris, Alternanthera triandra among the broad leaved weeds. Weeds are most serious biological constraints in direct seeded rice, because weed emergence coincide with the seedlings due to which the productivity is often lower. Weeds being hardy and having profuse root and shoot growth habit, grow faster than rice and thereby check the growth of rice by severe competition in critical crop weed competition period Direct yield loss has been estima...
A field experiment was conducted at Raipur to study the Biology of dominant weed species in direc... more A field experiment was conducted at Raipur to study the Biology of dominant weed species in direct seeded rice (Oryza sativa L.) in Chhattisgarh plains. Major weed flora were allowed to grow Echinochloa colona, Cyperus iria, Alternanthera triandra, Spilanthes acmella, Cyanotis axilaris). Studies on biology of different weed species at different intervals shows the growth pattern, life cycle, seed producing capacity of various dominant weeds, Echinochloa colona (4041 seeds plant -1), Cyperus iria (6550 seeds plant -1), Alternanthera triandra (1788 seeds plant -1), Spilanthes acmella (5920 seeds plant -1) and Cyanotis axillaris (470 seeds plant -1).
A field experiment was conducted at Raipur to study the yield losses due to dominant weed species... more A field experiment was conducted at Raipur to study the yield losses due to dominant weed species in direct seeded rice (Oryza sativa L.). Five Major weed flora were allowed to grow: Echinochloa colona, Cyperus iria, Alternanthera triandra, Spilanthes acmella, Cyanotis axilaris and group of weed species including grassy weeds, broad leaved weeds, mixed flora (control). The result of the experiment indicated that maximum yield losses occurred due to mixed flora (control) and the minimum yield loss occurred in weed free treatment. Among the five major weed species weed density, weed dry weight at harvest were maximum in Spilanthes acmella which were followed by Alternanthera triandra, Cyanotis axilaris Cyperus iria, Echinochloa colona. The highest grain (4.49 t ha) and straw yield (4.71 t ha) of rice were observed in weed free treatment and the minimum grain (0.53 t ha) and straw yield (0.93 t ha ) under mixed flora (control).
The present investigation entitled “Nutrient uptake by direct seeded rice (Oryza sativa L.) and r... more The present investigation entitled “Nutrient uptake by direct seeded rice (Oryza sativa L.) and removal by dominant weeds species in Chhattisgarh plains ” was carried out at Research cum Instructional Farm Farm, Indira Gandhi Krishi Vishwavidyalaya (IGKV), Raipur (C.G.) during Kharif season of 2016. Rice variety Rajeshwari was direct seeded on June 27th 2016 with a spacing of 20 x 10 cm and harvesting was done on November 3rd, 2016. The results of experiment indicated that maximum uptake of nutrient in grain and straw was recorded in weed free (3 Hand weeding) (T9) 56.14 and 17.52 kg ha-1 of N, 15.26 and 5.07 kg ha-1 of P and 14.16 and 85.03 kg ha-1 of K, respectively. Minimum uptake of 6.70 kg ha-1 of N, 0.91 kg ha-1 of P and 13.32 kg ha-1 of K was observed in control (Mixed flora) (T8) taking the total values of grain and straw. The nutrient removal by weeds was recorded maximum under control (Mixed flora) (T8) at 80 DAS 61.73, 8.72, 169.95 and at harvest 73.79, 10.44, 203.46 N, P...
A field experiment was conducted during rabi season of 2015-16 at Agriculture Farm, Institute of ... more A field experiment was conducted during rabi season of 2015-16 at Agriculture Farm, Institute of Agriculture, Visva-Bharati, Sriniketan, West Bengal on lateritic soil condition to study the growth and yield of chickpea(Cicer arietinum L.) as influenced by irrigation scheduling and zinc application. The experiment was conducted at split plot design having 5 main plot treatments (I1: irrigation at pre flowering, I2: irrigation at branching + pod development, I3: irrigation at branching + pre flowering, I4: irrigation at branching + pre flowering + pod development, I5: irrigation at 0.8 bar soil moisture tension) and 3 sub plot treatments viz. Zn0: control, Zn1: zinc sulphate @ 0.25%, Zn2: zinc sulphate @ 0.5%. The results of the experiment revealed that treatment I4 (i.e. irrigation at branching + pre flowering + pod development) and Zn2 (0.5% zinc sulphate) recorded highest plant height (43.28 cm), no of branches plant-1 (5.85), dry matter accumulation (231.33 g m-2), leaf area index...
Rice is grown mostly through transplanting in India, in spite of the fact that transplanting is c... more Rice is grown mostly through transplanting in India, in spite of the fact that transplanting is cumbersome practice and requires more labour. The inadequacy of irrigation water and scarce labour coupled with higher wages during the peak period of farm operations, invariably lead to delay in transplanting. To overcome this problem, farmers are gradually switching over to direct seeding under puddle condition. Wet seeding (Sowing pre-germinated seed on to puddle soil) reduces substantially the amount of labour needed for growing of rice crop. The wet seeding also helps to harvest the crop by 8- 10 days earlier than transplanting. It eliminates the use of seedlings and operations such as nursery preparation care of seedlings, pulling, bundling, transporting and transplanting .The demand for more irrigation water and seed rate with transplanting and direct sowing methods signifies the importance of the other methods of rice crop establishment such as system of rice intensification (SRI) to save water. With proper water and weed management under SRI and wet sowing we can get similar yields as that of transplanted rice. An attempt has been made in this paper to review the effect of establishment methods on rice crop yield.
Although weeds causes serious yield losses in agriculture, many studies have been conducted on th... more Although weeds causes serious yield losses in agriculture, many studies have been conducted on the relationship between weeds and yield loss in direct seeded rice. Major weeds found in Chhattisgarh plains are Echinochloa colona, Echinochloa crus-galli, Ischaemum rugosum, Oryza sativa (weedy rice), Leptochloa chinensis, Paspalum distichum among the grasses. Cyperus iria, Cyperus difformis, Cyperus rotundus, Fimbristylis miliacea among the sedges and Monochoria veginalis, Eclipta prostrate, Commelina benghalensis, Cynotis axillaris, Ceasulia axillaris, Alternanthera triandra among the broad leaved weeds. Weeds are most serious biological constraints in direct seeded rice, because weed emergence coincide with the seedlings due to which the productivity is often lower. Weeds being hardy and having profuse root and shoot growth habit, grow faster than rice and thereby check the growth of rice by severe competition in critical crop weed competition period Direct yield loss has been estima...
A field experiment was conducted at Raipur to study the Biology of dominant weed species in direc... more A field experiment was conducted at Raipur to study the Biology of dominant weed species in direct seeded rice (Oryza sativa L.) in Chhattisgarh plains. Major weed flora were allowed to grow Echinochloa colona, Cyperus iria, Alternanthera triandra, Spilanthes acmella, Cyanotis axilaris). Studies on biology of different weed species at different intervals shows the growth pattern, life cycle, seed producing capacity of various dominant weeds, Echinochloa colona (4041 seeds plant -1), Cyperus iria (6550 seeds plant -1), Alternanthera triandra (1788 seeds plant -1), Spilanthes acmella (5920 seeds plant -1) and Cyanotis axillaris (470 seeds plant -1).
A field experiment was conducted at Raipur to study the yield losses due to dominant weed species... more A field experiment was conducted at Raipur to study the yield losses due to dominant weed species in direct seeded rice (Oryza sativa L.). Five Major weed flora were allowed to grow: Echinochloa colona, Cyperus iria, Alternanthera triandra, Spilanthes acmella, Cyanotis axilaris and group of weed species including grassy weeds, broad leaved weeds, mixed flora (control). The result of the experiment indicated that maximum yield losses occurred due to mixed flora (control) and the minimum yield loss occurred in weed free treatment. Among the five major weed species weed density, weed dry weight at harvest were maximum in Spilanthes acmella which were followed by Alternanthera triandra, Cyanotis axilaris Cyperus iria, Echinochloa colona. The highest grain (4.49 t ha) and straw yield (4.71 t ha) of rice were observed in weed free treatment and the minimum grain (0.53 t ha) and straw yield (0.93 t ha ) under mixed flora (control).
The present investigation entitled “Nutrient uptake by direct seeded rice (Oryza sativa L.) and r... more The present investigation entitled “Nutrient uptake by direct seeded rice (Oryza sativa L.) and removal by dominant weeds species in Chhattisgarh plains ” was carried out at Research cum Instructional Farm Farm, Indira Gandhi Krishi Vishwavidyalaya (IGKV), Raipur (C.G.) during Kharif season of 2016. Rice variety Rajeshwari was direct seeded on June 27th 2016 with a spacing of 20 x 10 cm and harvesting was done on November 3rd, 2016. The results of experiment indicated that maximum uptake of nutrient in grain and straw was recorded in weed free (3 Hand weeding) (T9) 56.14 and 17.52 kg ha-1 of N, 15.26 and 5.07 kg ha-1 of P and 14.16 and 85.03 kg ha-1 of K, respectively. Minimum uptake of 6.70 kg ha-1 of N, 0.91 kg ha-1 of P and 13.32 kg ha-1 of K was observed in control (Mixed flora) (T8) taking the total values of grain and straw. The nutrient removal by weeds was recorded maximum under control (Mixed flora) (T8) at 80 DAS 61.73, 8.72, 169.95 and at harvest 73.79, 10.44, 203.46 N, P...
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