scholarly journals Studies on the Ecology and Control of Perennial Weed, Scirpus in Paddy Field

1978 ◽  
Vol 23 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Norimitsu ISHIKURA ◽  
Yoshio SOGA
Keyword(s):  
Paddy Field ◽  
Perennial Weed ◽  
And Control

scholarly journals Studies on the Ecology and Control of Perennial Weed, Scirpus in Paddy Field

1979 ◽  
Vol 24 (1) ◽  
pp. 28-32 ◽  
Author(s):  
Norimitsu ISHIKURA ◽  
Yoshio SOGA
Keyword(s):  
Paddy Field ◽  
Perennial Weed ◽  
And Control

Design and Research on Variable-Rate Fertilization Computer Control System

2012 ◽  
Vol 249-250 ◽  
pp. 610-615
Author(s):  
Shu Fa Chen ◽  
Cheng Long Feng ◽  
Shi Ping Zhang
Keyword(s):  
Control System ◽  
Paddy Field ◽  
Computer Control ◽  
Control Element ◽  
System Control ◽  
Variable Rate ◽  
Computer Control System ◽  
Working Mechanism ◽  
Working Performance ◽  
And Control

Based on domestic and foreign research situations of variable-rate fertilizing technology, the overall structure and working mechanism of variable-rate fertilizing machine were described, control content and strategy of control system were studied, AT89C5 SCM was used as a core control element in control system, control system hardware and software were designed and integrated. Variable-rate fertilizing experiments in space and paddy field showed that working efficiency of the spreader was up to 6 hm2/h, fertilizing error was less than 5%, fertilizing stability variation coefficient was less than 6.2%, working performance and control system design of the fertilizer can satisfy the demand of variable-rate fertilization in paddy field.

Biology and control of Reseda lutea L. 1. Seed biology and seedling growth

1997 ◽  
Vol 48 (4) ◽  
pp. 511 ◽  
Author(s):  
J. W. Heap
Keyword(s):  
Seedling Growth ◽  
Control Strategies ◽  
Germination Rate ◽  
South Australia ◽  
Effective Control ◽  
Temperate Climate ◽  
Perennial Weed ◽  
Seed Biology ◽  
Early Seedling ◽  
And Control

Reseda lutea L. is a major perennial weed of alkaline cropping soils in South Australia. Seed biology and early seedling growth of R. lutea were studied in field and laboratory experiments to gain information needed for effective control strategies. Recovery of intact seeds buried for 4 years in the field at 50 and 150 mm was 77–96%. Germination of this seed was 33–63% (50 mm) and 0% (150 mm). Germination patterns differed markedly between seed collected from 2 populations. Seed germinated at all constant and fluctuating temperatures between 10 and 35° C with the maximum (88%) at 25°C constant. Mean temperature, rather than constancy or fluctuation, determined the germination rate. Light strongly inhibited germination. Seedling shoot growth was slow but tap root growth was rapid, reaching 350 mm within 28 days of emergence. Secondary roots arose 3–7 days after emergence and shoot buds formed on the roots within 28 days. R. lutea was found to be well adapted for persistence in cultivated fields with a temperate climate.

scholarly journals Study on Ecology and Control of Rumex obtusifolius, a Perennial Weed in Grassland

1971 ◽  
Vol 1971 (12) ◽  
pp. 40-45
Author(s):  
Hiroshi SAKAI ◽  
Tokuo SATO ◽  
Katsumi FUJIWARA ◽  
Yutaka SHIMADA
Keyword(s):  
Perennial Weed ◽  
Rumex Obtusifolius ◽  
And Control

scholarly journals Studies on Ecology and Control of Oxalis martiana ZUCC, a Perennial Weed on Upland Fields

1963 ◽  
Vol 1963 (2) ◽  
pp. 55-59
Author(s):  
Takayoshi KATAOKA ◽  
Masao ARAI ◽  
Michinori SHIOBARA
Keyword(s):  
Perennial Weed ◽  
And Control

scholarly journals Application of Organic Fertilizer Tithonia Plus to Control Iron Toxicity and Reduce Commercial Fertilizer Application on New Paddy Field

2012 ◽  
Vol 17 (2) ◽  
pp. 135
Author(s):  
Nurhajati Hakim ◽  
Agustian . ◽  
Yanti Mala
Keyword(s):  
Rice Straw ◽  
Paddy Field ◽  
Organic Fertilizer ◽  
Fertilizer Application ◽  
Iron Toxicity ◽  
Rice Production ◽  
Commercial Fertilizer ◽  
West Sumatra ◽  
Main Plot ◽  
And Control

Ferrous toxicity is a one of the problems most often found in lowland rice systems in tropical and sub-tropical regionespecially in new paddy field (NPF) on Ultisols and Oxisols. Flooding during rice growth creates a chemicallyreduced state in soils causing reduction of insoluble (Fe3+) to soluble (Fe2+) form even at excessive level. ExcessiveFe2+ uptake is eventually the main cause of iron toxicity. The purpose of this study was to find an appropriateformulation of organic fertilizer Tithonia plus (OFTP) to control the iron toxicity, reduce the application of commercialfertilizers (CF) and increase rice production at various ages of NPF. The field experiment was conducted in farmerfields in Sitiung, Koto Baru sub-district, Dharmasraya district of West Sumatra province. Experimental design usedwas a factorial 2 x 6 in a split plot design. The main plot (A), the age of the opening of NPF were: 0 year;and 2 years;Subplot (B) a formulation of OFTP were: 2 Mg Tithonia ha-1 + 75% of CF; 2 Mg Tithonia ha-1 + 5 Mg rice strawha-1 + 50% of CF; 4 Mg Tithonia ha-1 + 25% of CF and three treatmens without Tithonia i.e. 5 Mg rice straw ha-1 +75% of CF; 2 Mg animal cow manure ha-1 + 75% of CF, and 100% of CF. Liming with 500 kg CaCO3 ha-1were appliedfor all treatments. The results showed the use of OFTP increased the nutrients availability such as N, P, and K onNPF and control the iron toxicity. The appropriate formulation of OFTP to control the iron toxicity and reduced theapplication of chemical fertilizer for higher rice production at NPF were two options: (1) 2 Mg of Tithonia ha-1 + 5 Mgof rice straw ha-1 + 50% of commercial fertilizers; and (2) 2 Mg of Tithonia ha-1 + 75% of commercial fertilizers. In thiscase the reducing of commercial fertilizers application were 50% and 25%, respectively.[How to Cite: Hakim N, Agustian and Y Mala. 2012. Application of Organic Fertilizer Tithonia Plus to Control Iron Toxicity and Reduce Commercial Fertilizer Application on New Paddy Field. J Trop Soils 17: 135-142. Doi: 10.5400/jts.2012.17.2.135][Permalink/DOI: www.dx.doi.org/10.5400/jts.2012.17.2.135]

scholarly journals SISTEM PERINGATAN KETINGGIAN AIR DAN KENDALI TEMUKU (PINTU AIR) UNTUK IRIGASI SAWAH

2020 ◽  
Vol 3 (1) ◽  
pp. 1-12
Author(s):  
I Gusti Made Ngurah Desnanjaya ◽  
I Gede Pandy Sastrawan ◽  
I Wayan Dani Pranata
Keyword(s):  
Water Level ◽  
Irrigation Water ◽  
Paddy Field ◽  
Irrigation System ◽  
Warning System ◽  
Warning Systems ◽  
Water Gate ◽  
Rainfed Lowland ◽  
Level Information ◽  
And Control

The irrigation system in rainfed lowland is done through a water gate (Temuku). Farmers should always control the height of the water and wetland gates during the dry and rainy seasons. This is due to delays in control which can cause the fields to dry or flooded. In this research, water warning system and Temuku control (water gate) for irrigation of paddy field. This tool can provide water level information and can also close or open the irrigation water gate through an SMS. Components used in the manufacture of water alert warning systems and the control of Temuku (sluice gates) for irrigation rice fields are arduino UNO, ultrasonic sensors, SIM 900 and servo motors. From the results of tests that have been done, it can be concluded that the system of water warning and control of Temuku (sluice gate) for irrigation of paddy field has been able to provide water level information to farmers and also the system has been able to control the irrigation water gate according to the input given by SMS.

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