scholarly journals Refinement of fertilizer recommendation based on Soil Test Crop Response technology for rice under System of Rice Intensification

2017 ◽  
Vol 9 (2) ◽  
pp. 855-859
Author(s):  
M. Vijayakumar ◽  
R. Santhi ◽  
S. Mohamed Jalaluddin
Keyword(s):  
Soil Fertility ◽  
Grain Yield ◽  
Tamil Nadu ◽  
System Of Rice Intensification ◽  
Cost Ratio ◽  
Soil Test ◽  
Research Station ◽  
Crop Response ◽  
Yield Model ◽  
Strong Basis

A study on Soil Test Crop Response based Integrated Plant Nutrition System (STCR - IPNS) were conducted adopting an Inductive cum Targeted yield model in non-calcareous sandy loam soils of Lithic Haplusteptat Regional Research Station, Tamil Nadu Agricultural University, Paiyur, Tamil Nadu during Kharif 2013 in orderto develop fertilizer prescriptions equation (FPEs) through IPNS for the desired yield targets of rice under SRI technique. A ready reckoner of fertilizer doses at varying soil test value, for attaining 6 to 9 t ha-1 target grain yield of rice has been worked out. Using these equations a validation trial was conducted on Kharif 2014 at this station. The grain yield of rice ranged from 2.54 t ha-1 in absolute control to 8.65 t ha-1 in STCR-IPNS-9 t ha-1. The STCR-IPNS @ 8 t ha-1 was effective and economical as compare with any other treatments. The deviation recorded in the achievement of targets aimed was within the range of ± 10 per cent (90 – 110 %) proving the validity of the FPEs. The STCR treatments recorded relatively higher response ratio (RR) and benefit-cost ratio (BCR) over blanket and farmer's practice and STCR-IPNS treatments recorded relatively higher RR and BCR over STCR-NPK alone treatments. Post-harvest soil tests for NPK revealed that there was maintenance of soil fertility. The STCR-IPNS @ 8 t ha-1 was effective and economical as compare with any other treatments. Thus, the Inductive cum Targeted yield model used to develop fertilizer prescription equations provides a strong basis for soil fertility maintenance consistent with high productivity and efficient nutrient management for sustainable and enduring Agriculture.

scholarly journals A semi-quantitative approach for modelling crop response to soil fertility: evaluation of the AquaCrop procedure

2014 ◽  
Vol 153 (7) ◽  
pp. 1218-1233 ◽  
Author(s):  
H. VAN GAELEN ◽  
A. TSEGAY ◽  
N. DELBECQUE ◽  
N. SHRESTHA ◽  
M. GARCIA ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Grain Yield ◽  
Soil Water ◽  
Crop Production ◽  
Water Productivity ◽  
Canopy Cover ◽  
Quantitative Approach ◽  
Fertility Level ◽  
Crop Response ◽  
Aquacrop Model

SUMMARYMost crop models make use of a nutrient-balance approach for modelling crop response to soil fertility. To counter the vast input data requirements that are typical of these models, the crop water productivity model AquaCrop adopts a semi-quantitative approach. Instead of providing nutrient levels, users of the model provide the soil fertility level as a model input. This level is expressed in terms of the expected impact on crop biomass production, which can be observed in the field or obtained from statistics of agricultural production. The present study is the first to describe extensively, and to calibrate and evaluate, the semi-quantitative approach of the AquaCrop model, which simulates the effect of soil fertility stress on crop production as a combination of slower canopy expansion, reduced maximum canopy cover, early decline in canopy cover and lower biomass water productivity. AquaCrop's fertility response algorithms are evaluated here against field experiments with tef (Eragrostis tef (Zucc.) Trotter) in Ethiopia, with maize (Zea mays L.) and wheat (Triticum aestivum L.) in Nepal, and with quinoa (Chenopodium quinoa Willd.) in Bolivia. It is demonstrated that AquaCrop is able to simulate the soil water content in the root zone, and the crop's canopy development, dry above-ground biomass development, final biomass and grain yield, under different soil fertility levels, for all four crops. Under combined soil water stress and soil fertility stress, the model predicts final grain yield with a relative root-mean-square error of only 11–13% for maize, wheat and quinoa, and 34% for tef. The present study shows that the semi-quantitative soil fertility approach of the AquaCrop model performs well and that the model can be applied, after case-specific calibration, to the simulation of crop production under different levels of soil fertility stress for various environmental conditions, without requiring detailed field observations on soil nutrient content.

scholarly journals Effect of phosphorus and determination of optimum nitrogen for bread wheat in Kofele District, West Arsi Zone of Oromia, Ethiopia

2020 ◽  
pp. 34-37
Author(s):  
Tilahun Firomsa ◽  
Abdurahman Husien ◽  
Kafyalew Assefa ◽  
Tilahun Abera ◽  
Amante Lemma ◽  
...  
Keyword(s):  
Grain Yield ◽  
Bread Wheat ◽  
Nitrogen Fertilizer ◽  
Block Design ◽  
Rate Of Return ◽  
Soil Test ◽  
Crop Response ◽  
Marginal Rate ◽  
Budget Analysis ◽  
Calibration Study

Optimum nutrients are basic for proper and balanced fertilizer recommendations as paramount importance in order to confirm food security and increase crop productivity in a sustainable way for farmers and other stakeholders. Soil test based crop response phosphorus calibration study for bread wheat at kofole district in 2016 with objectives to determine the optimum nitrogen of bread wheat to nitrogen-fertilizer applications in soils and to give quantitative guidelines and recommendations of nitrogen-fertilizer for bread wheat on Eutric Vertisols. The study was conducted on farmers’ fields across the district. The treatments considered for optimum nitrogen determination were four levels of nitrogen (0, 46, 69 & 92) and phosphorus (0, 23, 46 & 92) fertilizer included in the treatments. The treatments were arranged in a factorial combination of complete block design with two replications. The plot size of 5mx4m with a seed rate of 150kg/ha a variety of Ogolcho which had been recommended for the area was used. The analysis of variance showed that there were significant differences (p<0.05) among treatments application for all locations. The highest grain yield was obtained on the application 69N kg/ha with no application of phosphorus fertilizers on Eutric Vertisols. Minimum grain yield was obtained on the control plots at all sites. Optimum determination with the partial budget analysis made using the annual average bread wheat grains prices showed that 69 kg N ha-1 gave a marginal rate of return of 122.41%, which is above the acceptable minimum rate of return. Therefore, future research should focus on soil test crop response based phosphorus calibration study of on the result optimum nitrogen of the farmland could be a pre request of the technology before to the end user.

scholarly journals Development of Soil Test Based Fertilizer Prescription Equations for Chrysanthemum on Alfisol

2021 ◽  
Vol 108 (june) ◽  
pp. 1-5
Author(s):  
Balamurugan J ◽  
◽  
Santhi R ◽  
Maragatham S ◽  
Gopalakrishnan M ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Field Experiments ◽  
Nutrient Management ◽  
Precision Farming ◽  
Soil Test ◽  
Strong Basis ◽  
High Productivity ◽  
Basic Parameters

Field experiments were conducted during 2017 – 2018 to develop fertiliser prescriptions equations (FPEs) through IPNS for the desired yield targets of Chrysanthemum on Udic Haplustalf . The fertilisers prescription equations (FPEs) were developed under NPK alone and under IPNS for the desired yield target of Chrysanthemum by using the basic parameters. The variation observed in the achievement of targets was within the range of ± 10 per cent (90 – 110%) proving the validity of FPEs. Hence, the Inductive cum Targeted yield approach applied to develop fertiliser equations provides a strong basis for maintenance of soil fertility with high productivity and efficient nutrient management in “Precision Farming” for sustainable and enduring Agriculture.

scholarly journals Optimizing the nitrogen fertilizer requirement for prerelease short duration rice cultures in North Eastern zone of Tamil Nadu

2021 ◽  
Vol 16 (2) ◽  
pp. 126-130
Author(s):  
C. Muralidaran ◽  
S. Malathi ◽  
S. Banumathy
Keyword(s):  
Nitrogen Fertilizer ◽  
Tamil Nadu ◽  
Field Experiments ◽  
Cost Ratio ◽  
Research Station ◽  
Yield Attributes ◽  
Eastern Zone ◽  
North Eastern ◽  
Fertilizer Requirement ◽  
Check Variety

Field experiments were conducted for two years during 2017 and 2018 at Rice Research Station, Tirur to optimize nitrogen fertilizer requirement for pre-release rice cultures TM10085, TM 07335, TM 07030 along with the check variety CO51. The trial was conducted in split plot design with three replications and the main plot consisted of three pre-released rice cultures along with one check variety. The sub plot consisted of three fertilizers doses viz., 150-50-50 NPK kg/ha, 175-50- 50 NPK kg/ha and 125-50-50 NPK kg/ha. In this experiment, the rice culture TM10085, along with fertilizer application of 150-50-50 NPK kg/ha recorded the highest grain yield of 5505 kg/ha during 2018. This treatment also registered highest growth, yield attributes and benefit cost ratio in Tirur, Tiruvallur district of North Eastern Zone, Tamil Nadu.

Performance of Cowpea [Vigna Unguiculata (L.) Walp] Under Organic Production System in Southern Dry Zone of Karnataka

2019 ◽  
Author(s):  
S B Yogananda ◽  
P Thimmegowda ◽  
G K Shruthi
Keyword(s):  
Grain Yield ◽  
Production System ◽  
Agricultural Research ◽  
Sandy Loam ◽  
Chemical Properties ◽  
Organic Production ◽  
Soil Chemical Properties ◽  
Cost Ratio ◽  
Research Station ◽  
Organic Carbon Content

A field experiment was carried out during kharif 2013, 2014, 2015 and 2016 at Zonal Agricultural Research Station, V. C. Farm, Mandya to study the performance of cowpea under organic production system in red sandy loam soil. The results revealed that application of 100% N equivalent compost + recommended FYM (10 t/ha) + beejamrutha (seed treatment) + jeevamrutha (500 liter/ha) recorded significantly higher grain yield during all the years of experimentation (2056, 1987, 2108 and 2365 kg/ha, respectively) and also in their pooled data (grain yield 2129 kg/ha). This increased yield was attributed to more availability of nitrogen (289.5 kg/ha), phosphorus (40.5 kg/ha) and potassium (182.3 kg/ha) in the soil compared to other treatments. The benefit: cost ratio was higher with application of 100% N equivalent compost + jeevamrutha + beejamrutha (2.81). Soil chemical properties, viz. soil pH, organic carbon content and electric conductivity, were not influenced significantly by application of organic manures. However, there was an improvement in the soil chemical properties (289.5, 40.5 and 182.3 N, P2O5 and K2O kg/ha, respectively) compared to initial soil data (229, 19.2 and 135 NPK kg/ha).

scholarly journals Assessment of Balance Nutrition (N, P, K, Zn and B) and Green Manuring on Yield, Nutrient Uptake, Economics and Soil Fertility of Rainfed Rice (Oryza sativa L.) in Drought Prone Areas of Odisha

2020 ◽  
pp. 10-19
Author(s):  
J. Udgata ◽  
M. Barik ◽  
A. Phonglosa ◽  
S. K. Joshi ◽  
P. J. Mishra ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Nutrient Uptake ◽  
Crop Production ◽  
Oryza Sativa L ◽  
Block Design ◽  
Growth And Yield ◽  
Cost Ratio ◽  
Soil Test ◽  
Yield Attributes ◽  
Green Manuring

A field experiment was carried out in participatory mode on farmers’ field at Bhoimunda village of Jharsuguda block under Jharsuguda district, Odisha during Kharif season of 2017, 2018 and 2019 to study the efficiency of nutrient management along with green manuring crop on productivity, profitability and soil fertility of rice under Western Central Table Land Zone of Odisha, India. The adopted village was selected by Krishi Vigyan Kendra, Jharsuguda, Odisha under National Innovations in Climate Resilient Agriculture (NICRA) project. The experiment was laid out in Randomized Block Design with four treatments replicated five times taking rice (cv. Sahabhagi dhan) as test crop.  The treatments comprised of four viz. T1: Farmer’s practice (NPK @ 50:20:20 kg ha-1), T2: Recommended dose of fertilizer (NPK @ 60:30:30 kg ha-1), T3: 75% RDF + Green manuring of dhaincha  (Sesbania aculeata) with seed rate of @ 25 kg ha-1 and T4: Soil Test Based NPKZnB @ 75:38:30:6.25:1.25 kg ha-1 + Green manuring.  Results revealed that application of Soil Test Based NPKZnB @ 75:38:30:6.25:1.25 kg ha-1 along with green manuring producing dry biomass 5044 kg ha-1  (T4) recorded significantly higher growth and yield attributes, grain yield (4.04 t ha-1), straw yield (5.15 t ha-1), harvest index (43.92%) as well as nutrient uptake in grain and straw of the crop over farmers practice. The same treatment recorded significant improvement in soil pH, organic carbon, available macronutrients (N, P and K) and micronutrients (Zn and B) status of soil after harvest of the crop. The highest benefit: cost ratio (1.62) and returns (Rs. 28559 ha-1) were recorded with the same treatment (T4) over farmers practice. The present study showed that use of green manuring along with balance nutrition, is an important strategy to maintain and/or improve soil fertility for sustainable crop production in drought prone areas as well as remunerative rice production by the farmers in Odisha, India.

scholarly journals Weed Management Strategies for Enhanced Productivity in Groundnut

2020 ◽  
pp. 15-19
Author(s):  
T. Parthipan
Keyword(s):  
Weed Management ◽  
Tamil Nadu ◽  
Management Practice ◽  
Block Design ◽  
Management Strategies ◽  
Field Investigation ◽  
Cost Ratio ◽  
Research Station ◽  
Pod Yield ◽  
Hand Weeding

A field investigation was carried out at Regional Research Station, Tamil Nadu Agricultural University, Vridhachalam to evaluate suitable weed management strategies for enhanced productivity groundnut. The experiment was laid out in randomized complete block design with three replications and nine treatments. The treatments included were Pendimethalin @ 1.0 kg/ha as PE, Pendimethalin 30 EC + Imazethapyr 2 EC (ready  mix) @ 1.0 kg/ha as PE, Pendimethalin @ 1.0 kg/ha as PE fb Quizalofop-p-ethyl @ 50 g/ha at 15-20 DAS, Pendimethalin 30 EC + Imazethapyr 2 EC (ready mix) @ 1.0 kg/ha as PE fb Quizalofop-p-ethyl @ 50 g/ha at 15-20 DAS, Pendimethalin @ 1.0 kg/ha as PE fb Imazethapyr @ 75 g/ha at 15-20 DAS, Pendimethalin @ 1.0 kg/ha as PE fb Hand Weeding (HW) at 25-30 DAS, Pendimethalin 30 EC + Imazethapyr 2 EC (ready mix) @ 1.0 kg/ha as PE fb HW at 25-30 DAS, Two hand weeding at 20 and 40 DAS and Weedy check. Application of Pendimethalin 30 EC + Imazethapyr 2 EC (ready mix) @ 1.0 kg/ha on 3rd day after sowing followed by one manual weeding at 25-30 DAS recorded lower weed density of 33.3 No/m2, weed dry weight of 113 g/m2 with higher pod yield of 2400 kg/ha, net return of Rs. 62851/- per ha with BCR of 1.91. Among the herbicide combinations, application of pendimethalin @ 1.0 kg/ha on 3 DAS followed by Imazethapyr @ 75 g/ha at 15-20 DAS recorded pod yield of 1600 kg/ha with Benefit Cost Ratio of 1.38. From this study, it was concluded that application of Pendimethalin 30 EC + Imazethapyr 2 EC (ready mix) @ 1.0 kg a.i//ha on 3 DAS as pre-emergence followed by one hand weeding at 25-30 DAS was identified as efficient and economical weed management practice for groundnut.

scholarly journals Influence of nitrogen application on direct seeded rice in old and new Cauvery Delta zone of Tamil Nadu, India

2021 ◽  
Vol 13 (4) ◽  
pp. 1462-1469
Author(s):  
K. Sathiya Bama ◽  
K. R. Babu ◽  
R. Sharmila ◽  
A. Anuradha
Keyword(s):  
Grain Yield ◽  
Tamil Nadu ◽  
Field Experiments ◽  
Agricultural Research ◽  
Research Station ◽  
Nitrogen Application ◽  
Water Release ◽  
N Application ◽  
Direct Seeded ◽  
Cauvery Delta

Direct seeded rice is a boon to farmers where the water release from the reservoir is delayed. Nitrogen fertiliser management is one of the strategies bto rectify the nutrient-related issue in Direct seeded rice. The present study aimed to optimize the nitrogen dose for direct-seeded rice in the new and old Cauvery delta zone of Tamil Nadu. Field experiments were conducted during kuruvai and samba seasons at Tamil Nadu Rice Research Institute, Aduthurai and Agricultural research station Thanjavur representing old and new Cauvery delta regions during 2019-20 and 2020-21. Totally from eight experiments, the results of four field experiments in each location revealed the highest grain yield in the treatment T6 -application of 150 kg Nha-1 (5596kg/ha) which was statistically on par with treatment T5 -125kg N/ha (5326 kg/ha) in old delta and new delta. The higher grain yield was recorded in the T6 (5140 kg/ha), statistically on par with T5 (4550 kg/ha). The higher available nitrogen content of 312 kg/ ha,292 kg/ha was recorded for N application @ 150kg/ha, which was statistically on par with  309 kg/ha and 289 kg/ha, respectively, both the kuruvai and samba seasons for N application of 125 kg/ha. In the new CDZ, the same trend was followed as that of the old delta. Based on economics, N applied @125 kg/ha recorded a higher BC ratio for direct-seeded rice. For the benefit of farmers of both deltaic regions, the nitrogen application of 125 kg ha-1 for direct-seeded rice is recommended.

scholarly journals Productivity, water use efficiency and economics of system of rice intensification (SRI) in Nichabanadhi sub basin of southern Tamil Nadu

2017 ◽  
Vol 9 (1) ◽  
pp. 286-290
Author(s):  
M. Paramasivan ◽  
A. Selvarani
Keyword(s):  
Grain Yield ◽  
Water Use Efficiency ◽  
Water Use ◽  
Conventional Method ◽  
Tamil Nadu ◽  
Rice Cultivation ◽  
System Of Rice Intensification ◽  
Yield Attributes ◽  
Rice Intensification ◽  
Use Efficiency

Four hundred and sixteen on-farm demonstrations on system of rice intensification (SRI) were carried out in 350 hectares of farmer’s fields in Sankarankovil, Vasudevanallur and Kuruvikulam blocks of Tirunelveli district of Tamil Nadu from 2008-09 to 2010-11 under Tamil Nadu – Irrigated Agriculture Modernization and Water Bodies Restoration and Management (TN-IAMWARM) project. Two methods viz., SRI and conventional were compared. The results revealed that the adoption of SRI favorable influenced yield attributes and yield of rice. The maximum grain yield (8222 kg ha-1) obtained from SRI which was higher than conventional method (6534 kg ha-1). Higher grain yield coupled with substantial water saving to the tune of 37.1 per cent resulted in higher water use efficiency of rice under SRI method. The best net income ( Rs. 50, 587) and benefit: cost ratio (3.64) were also associated with SRI than conventional method of rice cultivation. The cost of cultivation was comparatively lesser in SRI which re-sulted in gaining an additional income of Rs. 8080 ha-1 as compared to conventional method of rice cultivation. The system of rice intensification (SRI) proved its benefits in this basin.

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