Dynamics of microbial community and enzyme assay as influenced by green manuring and weed control measures in rice-groundnut cropping system

2018 ◽  
Vol 50 (3) ◽  
pp. 282
Author(s):  
S.S. Pinjari ◽  
S.B. Ganagawane ◽  
Y.R. Govekar ◽  
U.V. Mahadkar ◽  
N.A. Meshram
Keyword(s):  
Microbial Community ◽  
Weed Control ◽  
Enzyme Assay ◽  
Cropping System ◽  
Control Measures ◽  
Green Manuring

scholarly journals Organic Weed Control Measures for Nigerian Cropping System

2020 ◽  
Vol 2 (6) ◽  
Author(s):  
Joseph E. O. Ansa ◽  
Kingsley O. Wiro
Keyword(s):  
Organic Farming ◽  
Weed Control ◽  
Cover Crops ◽  
Effective Means ◽  
Cropping System ◽  
Farming System ◽  
Crop Productivity ◽  
Underground Water ◽  
Control Measures ◽  
Effective Control

The need for sustainability has been the focus of every country especially developing countries of which Nigeria belongs. Population increases at an uncontrollable dimension and the provision of food for the populace becomes paramount. The productivity of crops is seriously hampered due to influence of weds which reduce the quantity and quality of plants by affecting plants growth, development and yield. Weeds reduce crops performance by as much as 80% in an uncontrolled situation. To increase crops yield and control weeds, synthetic substances like inorganic fertilizers, pesticides and herbicides were introduced into Nigerian cropping system. These off-farm-inputs caused soil degradation, soil compartment, soil pollution and environmental hazard as well as life uncertainty (insecurity) as herbicides enter water bodies and affect animals and human when such polluted underground water is used. Research on more efficient and effective means of saving the soil from destruction and adequate weed control measures gave rise to organic farming. The emergence of organic weed control is geared towards the effective control of weeds with environmental consideration and soil enrichment. Many organic weed control measures have been identified in Nigerian cropping system to include: use of cover crops, use of green manure, use of crop rotation, use of soil fauna, tillage, use of allelopathic plants, use of farmyard manures and biofertilizers. It was recommended that for increased food production to be achieved, organic farming system should be adopted, government at all levels should give more attention to the training of more personnel who will adequately control weeds, organic weed control measures should be advocated (encouraged) and there should be enlightenment for the Nigerian farmers on the need to adopt organic weed control measures in their cropping system for increased crop productivity.

Weed Control in a Conservation Tillage Rotation in the Texas Blacklands

Weed Science ◽  
1987 ◽  
Vol 35 (5) ◽  
pp. 695-699 ◽  
Author(s):  
Steven M. Brown ◽  
James M. Chandler ◽  
John E. Morrison
Keyword(s):  
Control Systems ◽  
Weed Control ◽  
Conservation Tillage ◽  
Grain Sorghum ◽  
Control Measures ◽  
Sorghum Halepense ◽  
Low Intensity ◽  
No Till ◽  
Primary Tillage ◽  
And Control

A field experiment was conducted to evaluate weed control systems in a conservation tillage rotation of grain sorghum [Sorghum bicolor(L.) Moench.] – cotton (Gossypium hirsutumL.) – wheat (Triticum aestivumL.). Herbicide systems included fall and spring/summer inputs of high and low intensity. Tillage regimes were no-till (NT) and reduced-till (RT) systems; the latter included fall primary tillage followed by spring stale seedbed planting. Both tillage systems utilized controlled traffic lanes and wide, raised beds. Effective johnsongrass [Sorghum halepense(L.) Pers. # SORHA] control required intense herbicide inputs at one or both application periods, i.e., in the fall and/or spring/summer. Grain sorghum and cotton yields for the most intense weed control system, which included high inputs in both the fall and spring/summer, were not superior to systems that included high inputs in only one of the two application periods. Seedling johnsongrass emergence occurred before spring planting in RT (but not in NT) in 2 of 3 yr, and control measures were ineffective. After 3 yr, the predominant weeds were johnsongrass and browntop panicum (Panicum fasciculatumSw. # PANFA).

Effects of Weed Control in Established Alfalfa (Medicago sativa) on Forage Yield and Quality

Weed Science ◽  
1987 ◽  
Vol 35 (4) ◽  
pp. 564-567 ◽  
Author(s):  
Dennis R. Cosgrove ◽  
Michael Barrett
Keyword(s):  
Medicago Sativa ◽  
Weed Control ◽  
Stand Density ◽  
Forage Yield ◽  
Control Measures ◽  
Acid Detergent Fiber ◽  
Yield And Quality ◽  
Herbicide Treatments ◽  
Forage Yields

The effects of weed control measures in established alfalfa (Medicago sativaL.) on forage yield and quality were investigated at three sites with varying alfalfa densities and weed populations. Herbicide treatments were 0.56 and 1.12 kg/ha metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one] applied in fall or spring, respectively, 1.68 kg/ha pronamide [3,5-dichloro (N-1,1-dimethyl-2-propynyl)benzamide] applied in fall, and combinations of these treatments. First-harvest forage yields (weeds plus alfalfa) were either reduced or unchanged by herbicide treatments. Total forage yield was not altered by the herbicide treatments, but first-harvest and total alfalfa yield as well as first-harvest forage protein content were increased by several treatments, depending on stand density and weed pressure. Little effect was observed on in vitro digestible dry matter or acid detergent fiber content.

EFFECT OF WHEAT, LEGUME AND LEGUME-ENRICHED WHEAT RESIDUES ON THE PRODUCTIVITY AND NITROGEN UPTAKE OF RICE-WHEAT CROPPING SYSTEM AND SOIL FERTILITY

2001 ◽  
Vol 49 (4) ◽  
pp. 369-378 ◽  
Author(s):  
S. N. SHARMA ◽  
R. PRASAD
Keyword(s):  
Adverse Effect ◽  
Soil Fertility ◽  
Nitrogen Uptake ◽  
Green Manure ◽  
N Uptake ◽  
Cropping System ◽  
Available P ◽  
Fertilizer N ◽  
Organic C ◽  
Green Manuring

Field experiments were conducted for two crop years at the Indian Agricultural Research Institute, New Delhi to study the effect of enriching wheat residue with legume residue on the productivity and nitrogen uptake of a rice-wheat cropping system and soil fertility. The incorporation of wheat residue had an adverse effect on the productivity of the rice-wheat cropping system. When it was incorporated along with Sesbania green manure, not only did its adverse effect disappear but the response to fertilizer N was also increased. There was no response to fertilizer N when Sesbania green manure was incorporated. When wheat residue was incorporated along with Sesbania green manuring, rice responded significantly to fertilizer N up to 120 kg N ha-1 in the first year and to 60 kgN ha-1 in the second year and at these levels of N, Sesbania + wheat residue gave 0.8 to 1.2 t ha-1 more grain, 0.6-1.0 t ha-1 more straw and 8-15 kg ha-1 more N uptake of rice resulting in 0.04-0.17% more organic C, 3-8 kg ha-1 more available P and 17-25 kg ha-1 more available K content in the soil than wheat residue alone at the same rates of N application. The respective increaseas caused by Sesbania green manure + wheat residue over Sesbania green manure alone were 0.3-0.5 t ha-1 in the grain and straw yield, 1-9 kg ha-1 in the N uptake of rice, 0.02-0.10% in organic C, 1-8 kg ha-1 in available P and 35- 70 kg ha-1 in available K content in the soil. These treatments also gave higher residual effects in succeeding wheat than wheat residue alone. The incorporation of residues of both wheat and Sesbania is thus recommended to eliminate the adverse effect of wheat residue and to increase the beneficial effects of Sesbania green manuring.

Russian Thistle (Salsola iberica) and Kochia (Kochia scoparia) Control in Dryland Corn (Zea mays)

1990 ◽  
Vol 4 (3) ◽  
pp. 631-634 ◽  
Author(s):  
R. E. Blackshaw
Keyword(s):  
Zea Mays ◽  
Weed Control ◽  
Crop Production ◽  
Production Systems ◽  
Cropping System ◽  
Field Studies ◽  
Kochia Scoparia ◽  
Field Corn ◽  
Salsola Iberica

Field studies were conducted in 1987, 1988, and 1989 at Lethbridge, Alberta to determine suitable herbicides for the control of Russian thistle and kochia in field corn grown in a dryland cropping system. Soil-applied atrazine or cyanazine provided inconsistent control of these weeds under dryland conditions. Combining inter-row tillage or 2,4-D applied postemergence with soil-applied atrazine improved the consistency of weed control over years. Postemergence atrazine and dicamba plus 2,4-D controlled Russian thistle and kochia in all years. Corn yields reflected the level of weed control attained with each treatment. The suitability of the various treatments for weed control in corn grown under dryland crop production systems is discussed.

scholarly journals CONTROL OF WEEDS IN AGROCENOSIS OF NUTU

2020 ◽  
pp. 135-147
Author(s):  
Yurii Shcatula ◽  
Volodymyr Votyk
Keyword(s):  
Weed Control ◽  
Consumption Rate ◽  
Growing Season ◽  
Control Measures ◽  
Years Of Experience ◽  
Important Condition ◽  
Important Place ◽  
Biological Products ◽  
Long Time ◽  
Harmful Effects

Nowadays no herbicide has been approved for use on chickpea crops has been officially registered in Ukraine. Weed control measures are mainly used. However, many years of experience in the use of a number of herbicides in our country and in other countries. In this regard, the effectiveness and selectivity of soil preparations such as Harnes, 90% k.e., and Frontier Optima, 72% k.e. were studied in chickpea crops. These herbicides were applied after sowing chickpeas until the emergence of seedlings. Application of Harness herbicide, 90% k.e., at a rate of 3.0 l / ha in the soil before the emergence of chickpea seedlings leads to a decrease in weed vegetation a month after application of the herbicide to 88% compared to control areas where measures to protect against storms vegetation was not carried out. The regulation of the number of weeds and their harmful effects in chickpea agrophytocenoses to an economically harmless level is an important condition in the technology of its cultivation. The most relevant weed control is at the beginning of the growing season of the crop, since this the chickpea grows very slowly, is in the rosette phase for a long time, and therefore does not withstand competition from weeds. To increase the yield of chickpea seeds, an important place in the technology of growing crops is the use of herbicides and biological products. Inoculation of chickpea seeds with Rizobofitt at a consumption rate of 1 l / t and with a biofungicidal preparation Biopolycide at a consumption rate of 100 ml/t, by introducing a soil herbicide Frontier Optima, 72% k.e., at a consumption rate of 1,2 l/ha, contribute to the reduction of weeds to 91%, and the ability to obtain the yield of chickpea seeds at the level of 2,12 t/ha.

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