INFLUENCE OF NITROGEN SOURCES INCORPORATED WITH A RANGE OF TILLAGE IMPLEMENTS ON WEED INFESTATION AND MAIZE YIELD

2018 ◽  
Vol 24 (3) ◽  
pp. 301-313
Author(s):  
Mehran Ali
Keyword(s):  
Nitrogen Sources ◽  
Maize Yield ◽  
Weed Infestation

Methods and time of application of labelled nitrogen and phosphorus fertilizers in maize (Zea mays L.) cultivation

1985 ◽  
Vol 104 (3) ◽  
pp. 529-534
Author(s):  
E. P. Papanicolaou ◽  
V. D. Skarlou ◽  
C. Nobeli ◽  
N. S. Katranis
Keyword(s):  
Field Experiments ◽  
Zea Mays L ◽  
Foliar Application ◽  
Alluvial Soil ◽  
Nitrogen Sources ◽  
Maize Yield ◽  
Nitrogen And Phosphorus ◽  
Maize Crop ◽  
Time Of Application ◽  
Maize Grain

SummaryIn this study two field experiments were conducted on a heavy to medium heavy, calcareous, recent alluvial soil of Central Greece. The main aim of these experiments was to study the effect of the most common nitrogen sources, applied in one or two doses, on maize growth and fertilizer utilization. Foliar application of urea was also a treatment included in these experiments.Phosphorus alone had no significant effect on maize yield. Nitrogen (various forms), alone or in combination with phosphorus, increased the yield and nitrogen content of maize. Maize yield was not significantly affected by the form of nitrogen or by dividing the application of nitrogen. Foliar applications of urea were as effective as soil applications in increasing maize grain yields.The percentage of fertilizer nitrogen taken up (utilization coefficient) ranged between ca. 58% for sodium nitrate and ammonium nitrate, and ca. 39% for ammonium sulphate and urea, when the fertilizers were applied about 10 weeks after sowing. Foliar urea was nearly as efficiently utilized as urea applied as a sidedressing. Application of the tested fertilizers before sowing was nearly as efficient as or more efficient than application of the fertilizers as a sidedressing at 70 cm plant height (38 days after sowing). Finally, addition of 120 kg N/ha enhanced the amount of soil nitrogen taken up in the maize crop by 33%.

scholarly journals Evaluation of crop arrangement and phosphorus rate on performance of maize-common bean intercropping in western Kenya

2020 ◽  
Vol 5 (3) ◽  
pp. 292-298
Author(s):  
Peter A. Opala ◽  
Dorcus O. Ofuyo ◽  
George D. Odhiambo
Keyword(s):  
Grain Yield ◽  
Significant Interaction ◽  
Maize Yield ◽  
Western Kenya ◽  
Land Equivalent Ratio ◽  
P Fertilizer ◽  
P Rate ◽  
Weed Infestation ◽  
P Application ◽  
Plot Design

The effect of phosphorus (P) rate and crop arrangement on the performance of component crops in maize-bean intercropping systems was investigated at two sites; Malanga and Bugeng’i in western Kenya. A split plot design with five crop arrangements in the main plots i.e., one row of maize alternating with one row of beans (conventional), maize and beans planted in the same hole, two rows of maize alternating with two of beans (Mbili), sole maize and sole beans, in a factorial combination with three P rates; 0, 30, and 60 kg ha-1 in the subplots, was used. Bean yields were low (< 1 t ha-1) but they increased with increasing P rate at both sites. Response of maize to P fertilizer was however poor at Malanga mainly due to Striga weed infestation. Yields of beans did not significantly differ among crop arrangements at both sites. At Bungeng’i, there was a significant interaction between P rate and crop arrangement. At this site, the maize yield in the conventional arrangement increased with increasing P rate but for the Mbili arrangement, the grain yield from application of 30 kg P ha-1 was significantly higher than that at 0 kg P ha-1 and similar to that 60 kg P ha-1. Therefore, it is not beneficial to fertilize beyond 30 kg P ha-1 at this site with the Mbili arrangement. Intercropping was beneficial in all crop arrangements (Land equivalent ratio >1) and can therefore be practiced, except for maize and beans planted in the same hole with no P application at Bugeng’i.

scholarly journals Testing of herbicidal systems for maize cultivation in the Steppe of Ukraine

2021 ◽  
pp. 32-36
Author(s):  
V. Sudak ◽  
A. Horbatenko ◽  
S. Semenov ◽  
А. Kulyk
Keyword(s):  
Economic Efficiency ◽  
Plant Protection ◽  
Weather Conditions ◽  
Maize Yield ◽  
Inhibitory Effect ◽  
Wetting Agent ◽  
Combined System ◽  
Maize Production ◽  
Weed Infestation ◽  
Favorable Weather

Goal. To determine the agrarian and economic efficiency of different technological systems for herbicidal protection of maize depending on the weed harmfulness level and weather conditions. Methods. Field experiment — for the weeds and maize yield accounting, and calculation method — for determining of the technical and economic efficiency of herbicide systems. Results. We recorded a significant decrease in the inhibitory effect of soil herbicides without precipitation, at elevated air temperature and hot dry wind in the first 5—7 days after their application. Also we specified the best pre-emergence herbicide Acris SE containing the active ingredients: Dimethenamid P (280 g/l) + Terbuthylazine (250 g/l). The number of weeds was indicated according to the experiment variants before spraying crops and 21 days after the application of toxicants. The technical and economic efficiency of combined (pre-emergence + post-emergence herbicides) and mixture of post-emergence products for protection systems of maize was determined. Conclusions. Under arid conditions, within 5—7 days after the application of pre-emergence herbicides (in 2018, the average background weed infestation of crops — 37 pcs/m2), the chemical plant protection system based on a tank mixture of post-emergence herbicides was ahead in terms of technical efficiency, yield and profitability grain production: Frontier Optima CE (Dimethenamid, 720 g/l) + Stellar RK (Topramezone, 50 g/l + Dicamba, 160 g/l) + Metolat wetting agent. The manifestation of soil herbicide phytotoxicity in favorable weather (in 2019—2020, background weed infestation of crops 129—147 pcs/m2) was more effective when using a combined system for controlling harmful species in the maize production technology: Dual Gold KE (S-metolachlor, 960 g/l) — before sowing + Stellar RK (Topramezone, 50 g/l + Dicamba, 160 g/l) + Metolat wetting agent — post emergence application. The best pre-emergence chemical product was Acris SE (Dimethenamid P, 280 g/l + Terbuthylazine, 250 g/l).

scholarly journals Influences of soil tillage and fertilization on maize yield and weed infestation

2006 ◽  
Vol 34 (1) ◽  
pp. 323-326 ◽  
Author(s):  
Miomir Tolimir ◽  
Miladin Veskovic ◽  
Ilija Komljenovic ◽  
Ivica Djalovic ◽  
Bojan Stipesevic
Keyword(s):  
Maize Yield ◽  
Soil Tillage ◽  
Weed Infestation

EFFECT OF PHOSPHATE FERTILIZER APPLICATION METHODS AND NITROGEN SOURCES ON MAIZE IN WESTERN KENYA: AN AGRONOMIC AND ECONOMIC EVALUATION

2007 ◽  
Vol 43 (4) ◽  
pp. 477-487 ◽  
Author(s):  
P. A. OPALA ◽  
B. A. JAMA ◽  
C. O. OTHIENO ◽  
J. R. OKALEBO
Keyword(s):  
Crop Production ◽  
Farmyard Manure ◽  
Nitrogen Sources ◽  
Maize Yield ◽  
Phosphate Fertilizer ◽  
Fertilizer Application ◽  
Net Benefit ◽  
Western Kenya ◽  
N Sources ◽  
P Fertilizer

Simultaneous deficiencies of nitrogen (N) and phosphorus (P) which limit crop production in western Kenya can be overcome through a combined application of organic and inorganic fertilizers. An experiment was conducted with maize (Zea mays) for two seasons to compare two methods of applying inorganic P fertilizer (broadcast versus spot) in a factorial combination with three N sources, i.e. farmyard manure (FYM), Tithonia diversifolia green manure (tithonia) and urea. Net financial benefits of the tested practices were computed using partial budgeting. Maize yield was not significantly affected by the P fertilizer application method in the first season, but the broadcast method was generally superior to spot application in the second season. The three N sources produced maize yields that were comparable in both seasons. FYM integrated with P fertilizer applied using the broadcast method, however, had the highest cumulative net benefit and was therefore the most economically attractive input combination.

scholarly journals WINTER COVER CROPS ON WEED INFESTATION AND MAIZE YIELD

2016 ◽  
Vol 29 (4) ◽  
pp. 885-891 ◽  
Author(s):  
LUAN CUTTI ◽  
FABIANE PINTO LAMEGO ◽  
ADALIN CEZAR MORAES DE AGUIAR ◽  
TIAGO EDU KASPARY ◽  
CARLOS ALBERTO GONSIORKIEWICZ RIGON
Keyword(s):  
Cover Crops ◽  
Dry Matter ◽  
Maize Yield ◽  
Cyperus Rotundus ◽  
Morning Glory ◽  
Weed Species ◽  
Full Flowering ◽  
Weed Infestation ◽  
Winter Cover ◽  
Winter Cover Crops

ABSTRACT The establishment of commercial crops in succession to winter cover crops that leaves a dense straw layer provides significantly suppression of weeds. The objective of this work was to evaluate the suppressive potential of winter cover crops on weed infestation in maize and its effect on the yield of the maize sown in succession. The experiment was conducted in the 2012/2013 crop season, in an area of the UFSM Campus Frederico Westphalen, State of Rio Grande do Sul. Four different species of cover crops (black oat, ryegrass, vetch and forage radish) were seeded and a fallow area was used as control. Evaluations to quantify the dry matter and chemical desiccation were performed at the full flowering period of the cover crops. Maize was sown in no-tillage system, in succession to the cover crops. The incidence and shoot dry matter of weeds (g 0.25 m-2) was evaluated 15 days after the maize emergence. The main weed species in the area were: morning-glory (Ipomoea grandifolia), wild poinsettia (Euphorbia heterophylla), large crabgrass (Digitaria sanguinalis) and purple nutsedge (Cyperus rotundus). In general, vetch and ryegrass were the winter cover crops that better suppressed the weeds evaluated. The best maize yield was found in the area previously covered with ryegrass, inferring a relation between the cover crop and suppression of weeds and crop yield.

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