On-farm assessment of site-specific nutrient management for rainfed lowland rice in the Philippines

2018 ◽  
Vol 220 ◽  
pp. 88-96 ◽  
Author(s):  
Niño P.M.C. Banayo ◽  
Stephan M. Haefele ◽  
Nenita V. Desamero ◽  
Yoichiro Kato
Keyword(s):  
Nutrient Management ◽  
The Philippines ◽  
Lowland Rice ◽  
Site Specific ◽  
Rainfed Lowland ◽  
On Farm

Site-specific nutrient management enhances sink size, a major yield constraint in rainfed lowland rice

2018 ◽  
Vol 224 ◽  
pp. 76-79 ◽  
Author(s):  
Niño P.M.C. Banayo ◽  
Crisanta S. Bueno ◽  
Stephan M. Haefele ◽  
Nenita V. Desamero ◽  
Yoichiro Kato
Keyword(s):  
Nutrient Management ◽  
Lowland Rice ◽  
Site Specific ◽  
Rainfed Lowland ◽  
Sink Size

scholarly journals Site-Specific Nutrient Management for Rainfed Maize in Western Mid-Hills of Nepal

2015 ◽  
Vol 3 (2) ◽  
pp. 227-231 ◽  
Author(s):  
Prakash Ghimire ◽  
Khem Raj Dahal ◽  
Santosh Marahatta ◽  
Krishna Devkota ◽  
Buddhi Raj Ghimire
Keyword(s):  
Nutrient Management ◽  
Block Design ◽  
Maize Production ◽  
Site Specific ◽  
Fertilizer Recommendation ◽  
Application Rates ◽  
Development Committee ◽  
Fertilization Practice ◽  
Village Development Committee ◽  
On Farm

 On-farm experiment was conducted in eight farmers’ field, of Khasyoli village development committee (952 to 1415 masl), Nepal, from April to September, 2011 to address the major constraint (nutrient management) to maize production through site-specific nutrient management (SSNM) as this approach is popular among scientists. The experiment comprised three nutrient omission plots (0N, 0P, and 0K), an ample NPK plot, and a farmers’ fertilization practice (FFP) plot, arranged in randomized complete block design. Farmers planted open pollinated variety (Manakamana-3) and managed in their way. Field-specific NPK application rates were calculated by considering nutrient demand, indigenous NPK supply and recovery efficiency of fertilizers. Grain yield in FFP (2.32 Mg/ha) and 0N (1.79 Mg/ha) plots differed significantly from each other and rest of the treatments, but was statistically similar among 0P (3.18 Mg/ha), 0K (3.40 Mg/ha) and ample NPK (3.38 Mg/ha) plots. Post-harvest grain and stover analysis revealed that indigenous NPK supply (20-71 kg N, 19-68 kg P2O5 and 51-164 kg K2O/ha) of soil vary among the farmers’ field. Moreover, soil was poor in indigenous N supply (42 kg/ha), but rich in indigenous P2O5 (35 kg/ha) and K2O (90 kg/ha) supply, on an average. As per the principles of SSNM, the initial fertilizer recommendation made can vary from 40-222 kg N, 0- 93 kg P2O5, and 0-50 kg K2O/ha. On an average, farmers may apply no or lower dose of P2O5 (18 kg/ha) and K2O (3 kg/ha) but need to significantly increase dose of N (143 kg/ha) fertilizer for enhancing soil and maize productivity.Int J Appl Sci Biotechnol, Vol 3(2): 227-231 DOI: http://dx.doi.org/10.3126/ijasbt.v3i2.12538   

Genotypic performance in multi-location on-farm trials for evaluation of different on-station screening methods for drought-prone rainfed lowland rice in Lao PDR

2014 ◽  
Vol 160 ◽  
pp. 1-11 ◽  
Author(s):  
P. Xangsayasane ◽  
S. Fukai ◽  
J.H. Mitchell ◽  
B. Jongdee ◽  
D. Jothityangkoon ◽  
...  
Keyword(s):  
Lao Pdr ◽  
Lowland Rice ◽  
Screening Methods ◽  
Rainfed Lowland ◽  
On Farm

THE RAINFED LOWLAND RICE RESEARCH CONSORTIUM: A MULTI-INSTITUTIONAL APPROACH FOR SUSTAINABLE PRODUCTIVITY INCREASES IN ASIAN RICE-BASED SYSTEMS

1999 ◽  
Vol 35 (2) ◽  
pp. 115-125 ◽  
Author(s):  
R. S. ZEIGLER
Keyword(s):  
Nutrient Management ◽  
Agricultural Research ◽  
Lowland Rice ◽  
Yield Potential ◽  
Multidisciplinary Teams ◽  
Nutrient Deficiencies ◽  
Rice Varieties ◽  
Asian Rice ◽  
Rainfed Lowland ◽  
Research Consortium

Input-responsive, high yielding rice varieties and associated technologies responsible for the doubling of yields on irrigated lands in Asia have not suited the area of more than 40 million hectares of Asian rainfed lowland rice. These environments are home to some of the poorest rural populations in South and Southeast Asia, and the rice crops are subject to drought, prolonged submergence from uncontrolled flooding and nutrient deficiencies. Farmers grow unimproved varieties and these, combined with abiotic stresses and low inputs, result in grain yields often less than 2 t ha−1. The International Rice Research Institute (IRRI) and National Agricultural Research Systems (NARS) have recently joined to form the Rainfed Lowland Rice Research Consortium in order to identify, prioritize and execute strategic research that addresses critical yield and productivity constraints. Principal intervention points for achieving sustainable yield increases are in developing drought- and submergence-tolerant germplasm with good yield potential, improved nutrient management under stress conditions, water use-efficient crop establishment practices, and understanding farmers' approaches to risk management. Multidisciplinary teams of IRRI and NARS scientists execute research at sites selected across the region to represent the key sets of constraints.

EVALUATION OF ON-FARM SOIL FERTILITY RESEARCH IN THE RAINFED LOWLAND RICE FIELDS OF SUKUMALAND, TANZANIA

2003 ◽  
Vol 39 (1) ◽  
pp. 65-79 ◽  
Author(s):  
H. C. C. MEERTENS ◽  
G. J. KAJIRU ◽  
L. J. NDEGE ◽  
H. J. ENSERINK ◽  
J. BROUWER
Keyword(s):  
Soil Fertility ◽  
Phosphorus Deficiency ◽  
Rice Fields ◽  
Lowland Rice ◽  
High Dose ◽  
Research Approach ◽  
Field Environment ◽  
Rainfed Lowland ◽  
Rice Yields ◽  
On Farm

The first ever on-farm soil fertility research in the rainfed lowland rice (Oryza sativa) fields of Sukumaland, in northwest Tanzania, was carried out between 1990 and 1996 in response to farmers' complaints about declining rice yields. From diagnosis to extension, the research approach followed that of the International Maize and Wheat Improvement Center (CIMMYT). In 1990/91, rice yields in the Maswa district increased sharply when nitrogen at a rate of 30 kg ha−1 in the form of urea was broadcast in flooded rice fields at tillering. Similar research was subsequently conducted in other parts of Sukumaland to evaluate this type of low-dose nitrogen application under varying circumstances. In 1995/96, higher doses of nitrogen (60 and 120 kg ha−1) and a high dose of phosphorus (17.5 kg ha−1) were applied for comparison in Sengerema district. Between 1990 and 1996, the average increase in rice yield from the application of 30 kg N ha−1 varied between 463 and 986 kg ha−1. In 1995/96, the same application of N was more economical than both 60 and 120 kg N ha−1, and no phosphorus deficiency was found. The deteriorating ratio between the price of rice at the farm gate and that of urea, however, threatens the adoption of this technology by farmers. Adaptability analysis showed that the relatively small differences in response per field (environment) in all years did not justify a need for multiple different extension messages. Until more detailed recommendations can be made, therefore, a single dose of 30 kg N ha−1, in the form of urea, applied to rice at tillering is recommended for the whole of Sukumaland to reverse the decline in yields. Further on-farm research should concentrate on improving the efficiency of nitrogen fertilization and on determining the optimum rates of other major nutrients to refine this initial recommendation.

On-Farm Evaluation of Rainfed Lowland Rice Varieties at Olokose Village, Odeda, Ogun State, Nigeria

2008 ◽  
Vol 7 (2) ◽  
pp. 192-196 ◽  
Author(s):  
A.A. Oyekanmi ◽  
K.A. Okeleye ◽  
C.J. Okonji
Keyword(s):  
Lowland Rice ◽  
Rice Varieties ◽  
Ogun State ◽  
Rainfed Lowland ◽  
On Farm

scholarly journals Sustainable Nutrient Management in Sugarcane Fields

2021 ◽  
Vol 2 (1) ◽  
pp. 36
Author(s):  
Anna Kusumawati ◽  
Syamsu Alam
Keyword(s):  
Soil Fertility ◽  
Nutrient Management ◽  
Site Specific ◽  
Long Period ◽  
Production And Consumption ◽  
Sustainable Nutrient Management ◽  
Sugarcane Productivity ◽  
On Farm ◽  
By Products

The state of sugar in Indonesia which is decreasing in terms of production, the imbalance between production and consumption, can occur due to two things, both on-farm and off-farm. Planting in monoculture for a long period of time will cause reduced soil fertility conditions so that sugarcane productivity decreases. Sustainable nutrient management in sugarcane plantations is an effort made to obtain optimal and profitable productivity, while still trying not to damage the environment so that it can be sustainable and its productivity can be maintained in the long term. Several concepts for sustainability have been put forward by many experts, including the use of site-specific fertilizers, maintaining soil fertility by using sugar processing by-products and the use of humic. It is hoped that some of these application methods can maintain sugarcane plantations to be sustainable.

INTEGRATED NUTRIENT–WEED MANAGEMENT UNDER MECHANISED DRY DIRECT SEEDING (DDS) IS ESSENTIAL FOR SUSTAINED SMALLHOLDER ADOPTION IN RAINFED LOWLAND RICE (ORYZA SATIVA L.)

2018 ◽  
Vol 55 (04) ◽  
pp. 509-525 ◽  
Author(s):  
PHENG SENGXUA ◽  
TAMARA JACKSON ◽  
PHETSAMONE SIMALI ◽  
LEIGH K. VIAL ◽  
KHAMSOUK DOUANGBOUPHA ◽  
...  
Keyword(s):  
Weed Management ◽  
Dry Matter ◽  
Oryza Sativa L ◽  
Weed Suppression ◽  
Lowland Rice ◽  
Direct Seeding ◽  
Seedling Vigour ◽  
Rainfed Lowland ◽  
Hand Weeding ◽  
On Farm

SUMMARYIn rainfed lowland rice-based systems, increasing labour scarcity due to off-farm employment is encouraging farmers to switch from transplanting to dry direct seeding (DDS). To assure stable productivity at a level comparable with or superior to transplanting, DDS management must ensure rice seedlings have access to nutrients in order to be competitive with weeds, which must also be suppressed. This paper examined farmer perceptions of DDS using a farmer survey, and used on-farm experiments to examine responses of rainfed lowland rice to integrated nutrient–weed management, based around mechanised DDS. In the survey, weeds were the biggest problem faced by farmers in using DDS (61%). In 90% of cases, farmers reported that weeds had increased under DDS, with most farmers (78%) controlling weeds by hand. All farmers said they would use DDS in the following season (100%), due to labour savings (47%), timeliness of operations, improved productivity, low investment or a combination of these (44%). In on-farm experiments, banding nutrients with the seed at sowing enhanced early dry matter of rice, while early weed dry matter was reduced. Early weed control using ducklings or hand weeding reduced weed competition and increased rice growth, with ducklings providing additional yield benefits over hand weeding. Early increases in seedling vigour of rice, and in weed suppression, carried through to greater dry matter and yield of rice at maturity. Integrated nutrient–weed management in mechanised DDS increased DDS yields, reduced DDS yield variability and contributed to sustainability of DDS rice systems.

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