Spectral models for estimation of chlorophyll content, growth and yield of wheat crop

2006 ◽  
Vol 34 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Mahender Singh ◽  
Ram Niwas ◽  
M. L. Khichar ◽  
Manoj K. Yadav
Keyword(s):  
Chlorophyll Content ◽  
Growth And Yield ◽  
Wheat Crop ◽  
Spectral Models

scholarly journals Accentuating the Role of Nitrogen to Phosphorus Ratio on the Growth and Yield of Wheat Crop

2021 ◽  
Vol 13 (4) ◽  
pp. 2253
Author(s):  
Maria Mussarat ◽  
Muhammad Shair ◽  
Dost Muhammad ◽  
Ishaq Ahmad Mian ◽  
Shadman Khan ◽  
...  
Keyword(s):  
Grain Yield ◽  
Chlorophyll Content ◽  
N Uptake ◽  
Growth And Yield ◽  
Yield Potential ◽  
Wheat Crop ◽  
P Deficiency ◽  
Spad Value ◽  
Biological Yield ◽  
The Impact

Nitrogen (N) and Phosphorus (P) deficiency is a major yield limiting factor across the globe and their proper management plays a vital role in optimizing crop yield. This field experiment was conducted to assess the impact of soil and plant nitrogen N and P ratio on the growth and yield of wheat (Triticum aestivum L.) in alkaline calcareous soil. The study consisted of various levels of nitrogen (0, 40, 80, and 160 kg ha−1 as urea) and phosphorus (0, 30, 60, and 90 kg P2O5 ha−1 as diammonium phosphate), and was carried out in randomized complete block design (RCBD) with factorial arrangement having three replications. The result showed that the addition of 160 kg N ha−1 significantly improved biological yield (10,052 kg ha−1), grain weight (3120 kg ha−1), chlorophyll content at tillering stage soil plant analysis development (SPAD) value (35.38), N uptake in straw (33.42 kg ha−1), and K uptake in straw (192 kg ha−1) compared to other N levels. In case of P, 90 kg P2O5 ha−1 had resulted maximum biological yield (9852 kg ha−1), grain yield (3663 kg ha−1), chlorophyll content at tillering stage (SPAD value 34.36), P (6.68 mg kg−1) and K (171 kg ha−1) uptake in straw. The sole use of N and P have positively influenced the biological and grain yield but their interaction didn’t response to biological yield. The present study reveals that SPAD value (chlorophyll meter) is the better choice for determining plant N and P concentrations to estimate the yield potential.

scholarly journals The Effect of Organic Fertilizers on Growth and Yield of Water Spinach (Ipomoea reptans Poir)

2021 ◽  
Vol 3 (2) ◽  
pp. 37-44
Author(s):  
Selvia Dewi Pohan
Keyword(s):  
Plant Growth ◽  
Water Content ◽  
Chlorophyll Content ◽  
Organic Fertilizers ◽  
Chicken Manure ◽  
Growth And Yield ◽  
Total Chlorophyll ◽  
Cow Manure ◽  
Water Spinach ◽  
Total Chlorophyll Content

Water spinach (Ipomoea reptans Poir) had been identified as a nutritious vegetable with high demand in Indonesia. Besides, this plant also has been evidenced to play an important role in environmental cleaning as phytoremediator. The study about the effect of organic fertilizers on the growth and yield of water spinach (Ipomoea reptans Poir) has been conducted in the Green House of Biology Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan. The study aims to investigate the most effective type of fertilizers and the dose for water spinach’s (Ipomoea reptans Poir) growth and yield. A Completely Randomized Factorial Design was designed for the experiment with two factors and three repetitions. The first factor is the type of fertilizer (chicken manure, cow manure, and compost), and the second factor is the dose of the fertilizer (1:1, 2:1, and 3:1). The parameters such as plant height, number of shoots, number of leaves, fresh weight, dry weight, leaf’s total chlorophyll content, and water content were measured to evaluate plant growth and yield. The General Linear Model used SPSS 21 programs was applied to analyze the collected data. Study results revealed that cow manure increased plant growth and yield significantly with dose 2:1 as the finest treatment, followed by dose 3:1. Cow manure also increased total chlorophyll content (8.0574c mg. L-1), with the most suitable dose was 2:1 (8.2807 mg. L-1). The plant’s water content tended to be high in chicken manure (93%), and the lower water content was in cow manure with dose 3:1 (87.5%).

scholarly journals Plant Growth and Yield Response of Tillage in Wheat Crop with Rotavator and Subsoiler Combination and No Tillage

2018 ◽  
Vol 7 (03) ◽  
pp. 1597-1600
Author(s):  
Sushil Kumar ◽  
Mukesh Jain ◽  
Vijaya Rani ◽  
Vinod Kumar ◽  
Anil Kumar ◽  
...  
Keyword(s):  
Plant Growth ◽  
Growth And Yield ◽  
Yield Response ◽  
Wheat Crop ◽  
No Tillage

Effect of different sowing methods and varieties on growth and yield performance of wheat crop

2021 ◽  
Vol 2 (1) ◽  
pp. 57
Author(s):  
Kapil Malik ◽  
O. P. Lathwal ◽  
A. K. Dhaka ◽  
Y. A. Tamboli ◽  
Amit Singh ◽  
...  
Keyword(s):  
Growth And Yield ◽  
Wheat Crop ◽  
Yield Performance

scholarly journals Nutrients Assimilation and Chlorophyll Contents for Different Grapevine Varieties in Calcareous Soils in the Somontano DO (Spain)

Beverages ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 90 ◽  
Author(s):  
José Casanova-Gascón ◽  
Pablo Martín-Ramos ◽  
Clara Martí-Dalmau ◽  
David Badía-Villas
Keyword(s):  
Chlorophyll Content ◽  
Fruit Set ◽  
Chlorophyll Concentration ◽  
Calcareous Soils ◽  
Pinot Noir ◽  
Growth And Yield ◽  
Cabernet Sauvignon ◽  
Chlorophyll Contents ◽  
Young Leaves ◽  
The Impact

Lime-induced chlorosis (LIC) is an important abiotic constraint affecting the growth and yield of grapevines growing in calcareous soils in the Mediterranean region, and the sensory properties of the produced wine. In the work presented herein, the impact of LIC on the nutritional status and chlorophyll content was assessed for eleven varieties and a clone (Merlot, Pinot Noir, Cabernet Sauvignon, Tempranillo, Parraleta, Moristel, Aglianico, Macabeo, Sauvignon, Chardonnay, and Riesling), grafted to the same rootstock (1103 Paulsen). Macro- and micronutrient contents were determined in the fruit set and veraison stages by petiole analyses, while chlorophyll content in young leaves was monitored by SPAD. Significant differences were detected amongst varieties for all nutrients (including Fe), and inverse relationships between Fe and P contents in the petiole and chlorophyll concentration in the young leaves were found. Regarding LIC resistance, the Fe and chlorophyll contents suggest that Cabernet Sauvignon, Tempranillo and Aglianico varieties would show the best performance, while Sauvignon would be the least tolerant.

Growth and Yield of CO2-Enriched Wheat Under Water-Limited Conditions

1979 ◽  
Vol 6 (3) ◽  
pp. 367 ◽  
Author(s):  
RM Gifford
Keyword(s):  
Water Supply ◽  
Crop Yields ◽  
Co2 Enrichment ◽  
Dry Weight ◽  
Atmospheric Co2 ◽  
Growth And Yield ◽  
Yield Enhancement ◽  
Wheat Crop ◽  
The Absolute ◽  
Four Levels

Wheat was grown at a density of 120 plants m-2 in deep pots of soil in two artificially illuminated growth cabinets. One cabinet was left at ambient CO2 levels and the other enriched by 250 volumes per million (vpm). Four levels of growth-restricting water supply were imposed. Responses by the two cultivars used (Gabo and WW15) did not differ appreciably in terms of the mature crop dry-weight parameters examined. Comparison of the crop responses to water supply indicated sufficient correspondence between generalized field behaviour and cabinet behaviour to justify tentative interpretation of the results in terms of possible response of water-limited field wheat crop yields to the globally rising level of atmospheric CO2. The less water made available to the crop the less was the absolute response of grain yield to CO2 enrichment, but the greater was the response relative to the control yield. Under extreme aridity (about 100-120 mm crop transpiration overall), the data implied infinite relative enhancement of yield due to CO2 enrichment, because it allowed some grain growth where none occurred without extra CO2. The absolute yield enhancement was equivalent to 5-13 kg ha-1 per 1.2 vpm increment of atmospheric CO2 concentration. The level of CO2 in the global atmosphere is currently rising by about 1.2 vpm year-1. The higher temperature at which the crops were grown (19°C), relative to average field conditions in many wheat areas, may influence this interpretation.

scholarly journals Effects of Severe Water Stress on Maize Growth Processes in the Field

2019 ◽  
Vol 11 (18) ◽  
pp. 5086 ◽  
Author(s):  
Libing Song ◽  
Jiming Jin ◽  
Jianqiang He
Keyword(s):  
Water Stress ◽  
Chlorophyll Content ◽  
Field Experiments ◽  
Seedling Stage ◽  
Growth And Yield ◽  
Summer Maize ◽  
Photosynthetic Membrane ◽  
Area Index ◽  
Severe Water Stress ◽  
Maize Plants

In this study, we investigated the effects of water stress on the growth and yield of summer maize (Zea mays L.) over four phenological stages: Seedling, jointing, heading, and grain-filling. Water stress treatments were applied during each of these four stages in a water-controlled field in the Guanzhong Plain, China between 2013 and 2016. We found that severe water stress during the seedling stage had a greater effect on the growth and development of maize than stress applied during the other three stages. Water stress led to lower leaf area index (LAI) and biomass owing to reduced intercepted photosynthetically active radiation (IPAR) and radiation-use efficiency (RUE). These effects extended to the reproductive stage and eventually reduced the unit kernel weight and yield. In addition, the chlorophyll content in the leaf remained lower, even though irrigation was applied partially or fully after the seedling stage. Severe and prolonged water stress in maize plants during the seedling stage may damage the structure of the photosynthetic membrane, resulting in lower chlorophyll content, and therefore RUE, than those in the plants that did not experience water stress at the seedling stage. Maize plants with such damage did not show a meaningful recovery even when irrigation levels during the rest of the growth period were the same as those applied to the plants not subjected to water stress. The results of our field experiments suggest that an unrecoverable yield loss could occur if summer maize were exposed to severe and extended water stress events during the seedling stage.

Lupin as a biological plough: evidence for, and effects on wheat growth and yield

1989 ◽  
Vol 29 (1) ◽  
pp. 99 ◽  
Author(s):  
CWL Henderson
Keyword(s):  
Nitrogen Fixation ◽  
Soil Water ◽  
Plant Density ◽  
Crop Rotations ◽  
Growth And Yield ◽  
Wheat Crop ◽  
Sand Soil ◽  
Wheat Growth ◽  
Residual N ◽  
Plant Densities

The effects of the density of lupin (Lupinus angustifolius L. cv. Illyarrie) taproots on a following wheat crop (Tritium aestivum L. cv. Gutha) were investigated on a compacted, earthy sand soil near Geraldton, Western Australia. In 1985, plots were sown to lupins at densities ranging from 35 to 220 plants m-2. Because peak lupin biomass varied by less than 25%, and 100 kg N ha-1 of mineral fertiliser was supplied to the wheat, the effects of variation in residual N from the lupins were considered to be minimal. In 1986, all plots were split for shallow or deep tillage and wheat sown. There were no effects of tillage or lupin density on stored soil water at sowing. Growth and yield of wheat on the shallow tilled plots increased linearly with lupin plant density in the previous year, to equal or better wheat yields on the deep tilled plots, which were unaffected by lupin density. At normal farm lupin plant densities, the biological plough effect was estimated to improve wheat yields by 100 kg ha-1, substantially less than the benefits from nitrogen fixation and breaks in disease cycles. Nevertheless, it still suggests that lupin stand densities should be maintained or increased in crop rotations on compacted sands.

Novel Utilization of Biofertilizers in Crop and Soil Improvement

2018 ◽  
Vol 4 (1-2) ◽  
Author(s):  
Juhi Yadav ◽  
Swati Yadav ◽  
Samuel Singh
Keyword(s):  
Chemical Properties ◽  
Triticum Aestivum L ◽  
Soil Improvement ◽  
Growth And Yield ◽  
Wheat Crop ◽  
Yield Parameters ◽  
Physico Chemical ◽  
Four Levels ◽  
Pod Length

The study was carried out to investigate the yield and soil quality of wheat (Triticum aestivum L.) and moong (Vigna radiate L.) crop. In order to obtain high precision in the results of the present investigation, the research trials were conducted for two consecutive years 2008-09 and 2009-10 under field conditions at Artoni (Agra) site. The experiment was laid out in RBD with five microbes (Azospirillum, Azotobactor, PSB, Azolla and Rhizobium) and four levels (120 and 60 kg N for wheat and 25 and 10 kg N for moong crop) of nitrogen. The results of this experiment proved that T2 treatment (Azospirillum +60 kg N ha-1) showed the best outcome during both the years for wheat crop and in moong crop. The growth and yield parameters i.e. plant height, no. of branches plant-1 no. of pods plant-1, pod length and grain yield were observed and treatment T7 (Rhizobium +10 kg N ha-1) was found to be better combination than others. The soil in respect to its physico-chemical properties showed an improvement due to the use of biofertilizers when compared to control and farmers practice.

Sign in / Sign up

Export Citation Format

Share Document