scholarly journals Bridging the Yield Gap in Rice Production by Using Leaf Color Chart for Nitrogen Management

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Naeem Ahmad ◽  
Ahmad Zada ◽  
Muhammad Junaid ◽  
Akhtar Ali
Keyword(s):  
Management Practice ◽  
Fertilizer Application ◽  
N Fertilizer ◽  
Leaf Color ◽  
Yield Gap ◽  
N Application ◽  
Color Chart ◽  
Management Techniques ◽  
Rice Genotypes ◽  
Leaf Color Chart

An experiment was conducted to optimize nitrogen fertilizer application for rice genotypes with the help of leaf color chart practice under agroclimatic conditions of Malakand division. The experiment was designed in RCB having split plot arrangement. Main plots consisted of rice genotypes, while subplots consisted of various doses of nitrogen. All the recorded parameters were significantly affected by the various N doses. In all treatments N application according to LCC management practice produced maximum tillers/hill, plant height, straw, and paddy yield as compared to N application according to recommended dose and farmer’s practice. This adequate supply of N fertilizer according to LCC management practice resulted in positive response of N fertilizer on the crop and also provided best fertilizer management techniques. Moreover, the interaction between rice genotypes and LCC management practice was the best for all the recorded parameters. The outcome results of the experiment provided an economic package to the farmers in application of N fertilizer on the basis of leaf color chart management practice.

scholarly journals Nitrogen Leaching and Nitrogen Balance under Differing Nitrogen Fertilization for Sugarcane Cultivation on a Subtropical Island

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 740
Author(s):  
Ken Okamoto ◽  
Shinkichi Goto ◽  
Toshihiko Anzai ◽  
Shotaro Ando
Keyword(s):  
N Uptake ◽  
Fertilizer Application ◽  
Application Rate ◽  
N Fertilizer ◽  
N Leaching ◽  
N Recovery ◽  
N Application ◽  
Fertilizer Application Rate ◽  
Sugarcane Yield ◽  
Cropping Seasons

Fertilizer application during sugarcane cultivation is a main source of nitrogen (N) loads to groundwater on small islands in southwestern Japan. The aim of this study was to quantify the effect of reducing the N fertilizer application rate on sugarcane yield, N leaching, and N balance. We conducted a sugarcane cultivation experiment with drainage lysimeters and different N application rates in three cropping seasons (three years). N loads were reduced by reducing the first N application rate in all cropping seasons. The sugarcane yields of the treatment to which the first N application was halved (T2 = 195 kg ha−1 N) were slightly lower than those of the conventional application (T1 = 230 kg ha−1 N) in the first and third seasons (T1 = 91 or 93 tons ha−1, T2 = 89 or 87 tons ha−1). N uptake in T1 and T2 was almost the same in seasons 1 (186–188 kg ha−1) and 3 (147–151 kg ha−1). Based on the responses of sugarcane yield and N uptake to fertilizer reduction in two of the three years, T2 is considered to represent a feasible fertilization practice for farmers. The reduction of the first N fertilizer application reduced the underground amounts of N loads (0–19 kg ha−1). However, application of 0 N in the first fertilization would lead to a substantial reduction in yield in all seasons. Reducing the amount of N in the first application (i.e., replacing T1 with T2) improved N recovery by 9.7–11.9% and reduced N leaching by 13 kg ha−1. These results suggest that halving the amount of N used in the first application can improve N fertilizer use efficiency and reduce N loss to groundwater.

scholarly journals Assessing Productivity and Profitability of Hybrid Rice With Site Specific Nutrient Management in Mid Western Terai, Nepal

2019 ◽  
Vol 7 (2) ◽  
pp. 1 ◽  
Author(s):  
Samikshya Acharya ◽  
Binita Mahara ◽  
Lal Prasad Amgain ◽  
Krishna Aryal ◽  
Bishnu l Prasad Kande
Keyword(s):  
Growth Rate ◽  
Management Practices ◽  
Nutrient Management ◽  
Hybrid Rice ◽  
Leaf Color ◽  
Site Specific ◽  
Color Chart ◽  
Straw Yield ◽  
Yield Difference ◽  
Leaf Color Chart

Rice (Oryza sativa L.) is a dominant staple food crop of Nepal which production and productivity is significantly declining compared to several years due to inappropriate nutrient management practices. A field experiment was conducted at Lamahi, Dang to evaluate the performance of hybrid rice(US-305) under rain fed condition with five precision nutrient management practices [Viz: Nutrient Expert® -Rice (NE) recommendation; Leaf Color Chart (LCC) N and Nutrient Expert (P and K); Nutrient Expert (N) and Farmers Fertilizer Practices (P and K); Farmers Fertilizer Practices (FFP) and Government Recommendation (GR)] replicated four times in RCBD design during June to October, 2018. The experimental finding showed that SSNM based Nutrient Expert® -Rice (NE) recommendation gave higher grain yield (6.36 ton ha-1) and straw yield (12.62 ton ha-1) which leads to highest gross return (NRs 242,498) and B: C ratio(3.08). Between the treatments Nutrient Expert® -Rice (NE) recommendation was excellent to growth parameters like plant height, crop growth rate, relative growth rate and leaf area index over FFP. Further, Nutrient Expert® -Rice (NE) recommendation gave significantly higher effective tiller m-2(354.50), panicle length (26.31), panicle weight (81.50), filled grain (390) and fertility (87.56%) over FFP. Nutrient Expert® -Rice (NE) recommendation has increased the grain yield by 23.97% with yield difference of 1.23 ton ha-1 and straw yield by 39.44 % with yield difference of 3.57 ton ha-1 in comparison with FFP. Hence the experiment concluded that site specific nutrient management recommendation that accounts Nutrient Expert® -Rice and leaf color chart could be the practical decision tool for making authentic fertilizer recommendation.

scholarly journals INTRODUCING LEAF COLOR CHART IN AGRICULTURE OF SINDH

2015 ◽  
Vol 1 (1) ◽  
pp. 19
Author(s):  
Shah leghari ◽  
Umeed leghari ◽  
Mehmooda Burriro ◽  
Aijaz Soomro
Keyword(s):  
Leaf Color ◽  
Color Chart ◽  
Leaf Color Chart

scholarly journals Long-Term Effects of Different Nitrogen Levels on Growth, Yield, and Quality in Sugarcane

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 353 ◽  
Author(s):  
Xu-Peng Zeng ◽  
Kai Zhu ◽  
Jian-Ming Lu ◽  
Yuan Jiang ◽  
Li-Tao Yang ◽  
...  
Keyword(s):  
Fertilizer Application ◽  
Sugar Yield ◽  
N Fertilizer ◽  
Cane Yield ◽  
Sugar Accumulation ◽  
Production Cycle ◽  
Long Term Effects ◽  
N Application ◽  
Yield And Quality

Nitrogen (N) plays an important role in sugarcane (Saccharum spp. hybrids) growth and development; however, long-term effects of N application levels on cane and sugar production in different sugarcane cultivars under field conditions remain unclear. In this study, we investigate the agronomic, yield, and quality traits in three sugarcane cultivars (GT11, B9, and ROC22) under different N levels (0, 150, and 300 kg/ha urea) from 2015 to 2019. Continuous four-year field experiments of plant and ratoon crops were carried out by using two-factor split-plot design. The results showed that N fertilizer application improved the tillering rate, stalk diameter, plant height, stalk weight, millable stalks/ha, cane yield, sugar yield and juice rate of cane, and the difference between N application and non-N application was significant. The cane yield, millable stalks/ha, juice rate, and juice gravity purity increased with the increase of N application, but the milled juice brix and sucrose % cane decreased with the increase of N application. The sugar yield was the highest at 150 kg/ha urea application, while the cane yield was the highest at 300 kg/ha urea application. Different N fertilizer application levels significantly regulated the activities of glutamic pyruvic transaminase (GPT) and glutamic oxaloacetic transaminase (GOT) and the contents of chlorophyll and nitrate N in plant leaves, which reflected the regulation in nitrogen metabolism and alteration in dry matter production and distribution, cane yield and sugar accumulation in different sugarcane cultivars. During the four-year experiment duration, the cane yield and sugar yield generally showed ROC22 > B9 > GT11. These data suggested that 300 kg/ha urea application was suitable for the plant and first ratoon crops, and 150 kg/ha urea application was suitable for the second and third ratoon crops. Both cane and sugar yields could be the highest in a four-year production cycle under this circumstance.

Factors influencing adoption of climate resilient paddy production practices in Andhra Pradesh, India

2020 ◽  
Vol 57 (3) ◽  
pp. 240-250
Author(s):  
Amtul Waris ◽  
N Sunder Rao
Keyword(s):  
Andhra Pradesh ◽  
Crop Insurance ◽  
Weather Forecast ◽  
Market Demand ◽  
Leaf Color ◽  
Color Chart ◽  
Drought Tolerant ◽  
Factors Influencing ◽  
Leaf Color Chart ◽  
Production Practices

This paper examined the factors affecting adoption of climate resilient practices in paddy production using data collected from farmers of Andhra Pradesh during the year 2019. Majority of the farmers reported increase in temperature, unpredictability in weather, reduced duration of winter, uneven and irregular rainfall as the climatic change events. The practices being followed by farmers which fit the adaptation criteria were timely sowing and weeding, proper spacing and formation of soil bunds. The climate resilient practices most preferred and prioritized by paddy farmers were direct sown rice, drought tolerant varieties, weather forecast services, integrated nutrient management, growing of green manure crops followed by crop diversification, crop insurance, system of rice intensification (SRI) and use of leaf color chart. Market demand, assured irrigation, land fertility, and availability of finance were the major factors governing the decision to grow crops. The educational level of farmers exhibited significant and positive correlation with practices namely SRI, use of leaf color chart, crop insurance, weather forecast services and drought tolerant varieties. Analysis of factors influencing the adoption of climate resilient paddy production practices would help to promote and disseminate these practices to increase the adoption rate and also aid in the framing of appropriate policies.

Chlorophyll Meter– and Leaf Color Chart–Based Nitrogen Management for Rice and Wheat in Northwestern India

2002 ◽  
Vol 94 (4) ◽  
pp. 821-829 ◽  
Author(s):  
Bijay Singh ◽  
Yadvinder Singh ◽  
Jagdish K. Ladha ◽  
Kevin F. Bronson ◽  
Vethaiya Balasubramanian ◽  
...  
Keyword(s):  
Nitrogen Management ◽  
Leaf Color ◽  
Color Chart ◽  
Chlorophyll Meter ◽  
Northwestern India ◽  
Leaf Color Chart

Greenhouse gas mitigation in rice–wheat system with leaf color chart-based urea application

2011 ◽  
Vol 184 (5) ◽  
pp. 3095-3107 ◽  
Author(s):  
Arti Bhatia ◽  
Himanshu Pathak ◽  
Niveta Jain ◽  
Pawan K. Singh ◽  
Ritu Tomer
Keyword(s):  
Greenhouse Gas ◽  
Greenhouse Gas Mitigation ◽  
Leaf Color ◽  
Color Chart ◽  
Leaf Color Chart
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