scholarly journals Varietal performance of rice under different source of nutrition in high altitude and tribal areas of Andhra Pradesh

2021 ◽  
Vol 16 (1) ◽  
pp. 46-51
Author(s):  
A. Upendra Rao ◽  
K. Tejeswara Rao ◽  
D. Sekhar ◽  
V. Visa Lakshmi ◽  
N. Hari Satyanarayana
Keyword(s):  
Grain Yield ◽  
High Altitude ◽  
Organic Farming ◽  
Andhra Pradesh ◽  
Agricultural Research ◽  
Growth Yield ◽  
Scientific Data ◽  
Research Station ◽  
Yield Attributes ◽  
Tribal Areas

A field experiment was conducted for two consecutive Kharif seasons of 2012-13 and 2013-14 in a Split Plot Design with three replications, at Agricultural Research Station, Seethampeta, Andhra Prtadesh, India to generate scientific data on organic farming, integrated nutrient and pest management practices, chemical farming with four prominent varieties of rice viz., MTU 1001, RGL 2538, BPT 5204 and MTU 7029 in high altitude and tribal areas of Andhra Pradesh. Results showed that, grain yield of rice was reduced in organic farming by 37 per cent and 30.23 per cent compared to chemical farming and INM practices. Growth, yield attributes of rice also reduced noticeably in organic farming. Whereas, organic farming recorded higher root biomass per hill at flowering, higher post nutrient status of available nitrogen, phosphorus and potassium and lesser incidence of diseases and pests over INM and chemical farming. Chemical farming recorded higher growth, yield attributes, yield and returns. Among the cultivars, MTU 1001 showed better performance and recorded the higher grain yield and straw yields and least affected by diseases and pests compared to other varieties.

scholarly journals Effect of date of harvesting on yield and quality of different rice varieties

2020 ◽  
Vol 15 (3) ◽  
pp. 188-192
Author(s):  
K. Anny Mrudhula ◽  
B. Krishna Veni
Keyword(s):  
Grain Yield ◽  
Agricultural Research ◽  
Growth Yield ◽  
Flowering Plant ◽  
Research Station ◽  
Rice Varieties ◽  
Yield Attributes ◽  
Straw Yield ◽  
Yield And Quality

Greater attention should be paid for increasing the yield per unit area by growing modern varieties of rice through improved cultivation practices. An experiment was conducted for investigating the effect of variety and date of harvesting on yield performance of modern rice varieties during Kharif, 2012 at Agricultural Research Station, Bapatla. The experiment was laid out in a split-plot design with three replications. Main treatments comprised of four rice varieties namely, BPT 5204, BPT 2270, BPT 2231, NLR 34449, NLR 28523 and MTU 1010 and sub treatments comprised of three time of harvesting viz., 25, 30 and 35 days after flowering. Plant growth, yield attributes, yield and quality of rice varieties were significantly influenced by different dates of harvesting. BPT 2270 was found significantly superior to all other varieties in respect of effective tillers, grains panicle-1, grain yield, straw yield and hulling per cent, milling per cent and head rice recovery. Among three harvesting times, the highest grain yield (6250 kg ha-1) and straw yield (7314 kg ha-1) were obtained when the crop was harvested at 30 days after flowering. The interaction effect of variety and date of harvesting was significant in respect of grain and straw yield. The highest grain yield (7771 kg ha-1) was observed in BPT 2270 when harvested at 30 days after flowering. Therefore, optimum date of harvesting for higher grain yield may be 30 days after flowering for avoiding immature stage as well as shattering loss.

Effect of Land Configuration and Weed Management on Performance of Urdbean [Vigna mungo (L.) Hepper]

2020 ◽  
Author(s):  
P. Venkata Rao ◽  
A. Subbarami Reddy ◽  
M. V. Ramana
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Management Practices ◽  
Agricultural Research ◽  
Vigna Mungo ◽  
Growth And Yield ◽  
Research Station ◽  
Marginal Lands ◽  
Yield Attributes ◽  
Plot Design

Background: Blackgram is an important crop among kharif pulses and is usually grown on marginal and sub-marginal lands without proper weed management under rainfed situation. Broad bed furrows had greater influence on plant growth over farmers practice. Weed management through mechanical or manual is normally tedious, labour consuming and costlier. Keeping this in view, the present study was envisaged to investigate integrated effect of land configuration and weed management regimes on productivity of urdbean. Methods: A field experiment was carried out during kharif seasons of 2016 and 2017 at Regional Agricultural Research Station, Lam, Guntur on effect of land configuration and weed management on performance of urdbean (Vigna mungo L.Hepper). The treatments included two land configurations i.e., flat bed and broad bed furrow method allotted as horizontal plots and four weed management practices i.e., weedy check, pendimethalin 30 EC @ 1.0 kg a.i ha-1 PE, imazethapyr 10% SL @ 55 g ha-1 at 15-20 DAS and pendimethalin 30 EC @ 1.0 kg a.i ha-1 PE fb imazethapyr 10% SL @ 55g ha-1 at 15-20 DAS allotted as vertical plots replicated four times in a strip plot design. The comparison of treatment means was made by critical difference (CD) at P less than 0.05 by using standard statistical procedures. Result: Based on the results, it can be concluded broad bed method of land configuration proved its superiority over flat bed method by producing 12.8 per cent higher grain yield besides empowering growth and yield attributes. Among the weed management practices, the highest grain yield (1280 kg ha-1) recorded with pendimethalin 30 EC @ 1.0 kg a.i ha-1 PE fb imazethapyr 10% SL @ 55g ha-1 at 15-20 DAS along with maximum monetary returns and B:C can be recommended for urdbean.

scholarly journals Growth, yield attributes and yield of irrigated spring wheat as influenced by sowing depth

2018 ◽  
Vol 3 (1) ◽  
pp. 72-83 ◽  
Author(s):  
M.M. Bazzaz ◽  
Akbar Hossain ◽  
Jagadish Timsina ◽  
Jaime A. Teixeira da Silva ◽  
M. Nuruzzaman
Keyword(s):  
Grain Yield ◽  
South Asia ◽  
Plant Biomass ◽  
Agricultural Research ◽  
Winter Season ◽  
Research Station ◽  
Dry Matter Accumulation ◽  
Residual Soil ◽  
Yield Attributes ◽  
Sowing Depth

Abstract In South Asia, including Bangladesh, most farmers sow wheat under residual soil moisture after rice is harvested, but the upper layer of soil dries quickly after soil has been prepared for wheat sowing. Crop seeds that are sown either deeply or shallowly can result in failed emergence, low dry matter accumulation, and reduced grain yield. Therefore, appropriate sowing depth is crucial for seedling emergence and successful crop establishment. Considering this, a two-year field experiment was conducted at the research field of the Agricultural Research Station of the Bangladesh Agricultural Research Institute at Dinajpur during the dry, rabi (winter) season of 2013-14 and 2014-15, at four sowing depths, i.e., 2, 4, 6 and 8 cm, to identify the most appropriate sowing depth for higher grain yield. Wheat seeds sown at a depth of 4 cm resulted in significantly highest number of seedlings and seminal roots, tallest plants as well as largest roots and plant biomass followed by sowing at a depth of 6, or 2 cm. Depth of sowing also significantly affected the yield and yield-related attributes, all performing best at a depth of 4 cm. The highest number of spikes m-2, grain yield, straw yield and harvest index were observed when seeds were sown at depths of 4 or 6 cm, relative to 2 or 8 cm. Therefore, a sowing depth of 4 to 6 cm is recommended for wheat cultivation in South Asia, including Northern Bangladesh.

scholarly journals Response of zinc application on growth, zinc content and grain yield of rice genotypes and correlation between zinc content and yield attributes of rice genotypes

2018 ◽  
Author(s):  
Venkatesh Dore ◽  
R.V. Koti ◽  
K.K. Math
Keyword(s):  
Grain Yield ◽  
Field Experiments ◽  
Agricultural Research ◽  
Foliar Application ◽  
Block Design ◽  
Foliar Spray ◽  
Zinc Content ◽  
Research Station ◽  
Yield Attributes ◽  
Rice Genotypes

Field experiments were conducted during kharif 2013 and 2014 at Agricultural Research Station, Mugad, University of Agricultural Sciences (UAS), Dharwad (Karnataka), to determine the response of zinc applicationon on growth, zinc content and grain yield of rice genotypes and also studied correlation between yield and zinc content. The experiment was comprised of 20 genotypes and three treatments viz., T1: Control (no zinc); T2: Soil application of ZnSO4 (20 kg ha-1) T3– Foliar Spray of ZnSO4 @ 0.5% at 50% flowering, laid out in factorial randomized block design with two replications. The data revealed that application of ZnSO4 recorded significantly higher plant height (85.9 cm), leaf area (764.5 cm-2 plant-1), number of tillers (95.4 m-1), total dry weight (26.1 g plant-1), panicle weight(15.3 g plant-1), number of panicles (81.6 m-1) and grain yield(3966 kg ha-1) over the foliar application of Zn and control . However number of grains panicle-1 (97.8 panicle-1), test weight (23.7 g), shoot and seed zinc content (15.9 and 21.2 ppm, respectively) were increased with foliar application of Zn. Correlation studies classified the genotypes as high seed zinc content (> 21 ppm) and low seed zinc content genotypes ( less than 21 ppm). High and low seed zinc content genotypes showed negative correlation with yield and yield attributes. However, shoot zinc content was positively correlated with yield.

scholarly journals Jiwamrita: A Low Cost Organic Nutrient Source for Growth, Yield and Economics of Organic Mungbean [Vigna radiata (L.) Wilczek] under Changing Agricultural Environment

2021 ◽  
pp. 120-129
Author(s):  
Anil Swami ◽  
Moola Ram ◽  
R. C. Meena ◽  
Durga Shankar Meena ◽  
Surendra Kumar
Keyword(s):  
Grain Yield ◽  
Agricultural Research ◽  
Foliar Application ◽  
Foliar Spray ◽  
Research Station ◽  
Microbial Culture ◽  
Yield Attributes ◽  
Net Return ◽  
Mode Of Application ◽  
Growth Attributes

Aims: To find a suitable alternate option of nutrient management in organic mungbean with standardization of dose and its mode of application. Place and Duration of Study: Agricultural Research Station, Mandor, Jodhpur between July 2020 and October, 2020. Methodology: Treatment comprised of main plots as mode of application: M1: Soil application, M2: Foliar application and M3: Soil and foliar application and sub plots as dose of Jiwamrita: S1: Control, S2: 50 ml/l, S3: 100 ml/l and S4: 150 ml/l were replicated thrice in split plot design. FYM @ 5.0 t/ha was applied on the soil and the field of the experimental site was prepared by disking following harrowing and planking. The crop variety GM 6 was sown on 10th July, 2020 at row spacing of 30 cm with seed rate of 15 kg/ha. The plants were kept at 10 cm distance after thinning at 15 days after sowing. Jiwamrita was prepared using Palekar [1] method (Photo 1) and was kept in shade for 7 days. It was filtered before using for spray as per treatments. It was applied as soil spray at the time of sowing and 15 days after sowing as per treatments of different doses. Foliar application of Jiwamrita was done at 15 and 30 days after sowing as per treatments. Total quantity of solution containing Jiwamrita was 500 liter/ha in all the treated plots. In control plots, a quantity of 500 liter/ha was used as spray. Weeding was done manually at 15 and 30 days after sowing. Data on growth attributes, yield attributes and grain yield was recorded from net plot size of 4 m x 1.8 m and converted into hectare basis. The gross return was computed by multiplying current price of mungbean with yield. The net return was estimated by deducting cost of cultivation from gross return. The benefit-cost ratio was worked out by dividing gross return by cost of cultivation. Results: Maximum plant height of 71.5 cm was recorded with a dose of Jiwamrita @ 150 ml/liter which was at par with Jiwamrita @ 100 ml/liter. The SPAD chlorophyll meter reading (SCMR) of leaves increased at 50 DAS (53.5) being maximum with Jiwamrita @ 150 ml/liter which was significantly higher over SCMR recorded with Jiwamrita @ 50 ml/liter (34.7). The significantly maximum number of pods/plant (28.7) and maximum grain yield (1314 kg/ha) was recorded due to combined application of soil and foliar application of Jiwamrita. Among doses, maximum number of pods (30.9) was recorded under Jiwamrita @ 150 ml/liter which was 30, 24 and 16 percent higher over control and Jiwamrita @ 50, 100 ml/liter. The application of Jiwamrita @ 150 ml/liter resulted in significantly higher grain yield (1221 kg/ha) which was found at par with Jiwamrita @ 100 ml/liter (1179 kg/ha) which were 17 and 13 percent higher, respectively, over control and 9 and 5.6 percent higher, respectively, over Jiwamrita @ 50 ml/liter. The maximum net return ( 65672 ha-1) was recorded with 150 ml/liter followed by 100 ml/liter ( 62686 ha-1). Conclusion: Jiwamrita is a fermented microbial culture which provides essential nutrients to plants. Its application in both soil and plant canopy were found beneficial. The study revealed that twice application of Jiwamrita in soil at the time of sowing and 15 days after sowing and twice application of Jiwamrita as foliar spray at 15 and 30 days after sowing significantly increased the growth attributes, yield attributes and yield of organic mungbean.

scholarly journals Response of Blackgram (Phaseolus mungo L.) Varieties to Weed Competition and to Pre and Post Emergence Herbicide Application during Rabi

2021 ◽  
Author(s):  
B. Pramila Rani ◽  
K. Srinivasulu ◽  
E. Venkateswarlu
Keyword(s):  
Weed Control ◽  
Andhra Pradesh ◽  
Dry Matter ◽  
Agricultural Research ◽  
Research Station ◽  
Rabi Season ◽  
Herbicide Application ◽  
Yield Attributes ◽  
Phaseolus Mungo ◽  
Manual Weeding

Background: Blackgram (Phaseolus mungo L.), a major pulse crop of Andhra Pradesh grown in an area of 3.52 lakh ha with a production of 2.93 lakh tons during rabi season (Anonymous, 2019). One of the major characteristics for selection of blackgram varieties for rabi season under conditions of receding soil moisture in black soils is their early vigour and good weed smothering capability. Early varieties due to their early growth habit can cover the land and thus can smother weeds better than late maturing varieties. Further some variations are observed to be more tolerant to post emergence herbicide application. Hence, there is need to evaluate the promising blackgram varieties for their weed competitiveness and tolerance to pre and post emergence herbicidal application.Methods: A field experiment was carried out at Regional Agricultural Research Station, Lam, Guntur, Andhra Pradesh, with an objective to find out the competitive ability of blackgram varieties to smother weeds during rabi season of 2015-16 and 2016-17 under upland conditions. The experiment was laid out in split plot design with three replications. The treatments consisted of five methods of weed control as main plots, viz., pendimethalin 1.0 kg ha-1 PE, imazethapyr 50 g ha-1 PoE, pendimethalin 1.0 kg ha-1 PE fb imazethapyr 50 g ha-1, PoE, manual weeding at 20 and 40 days after sowing (DAS) along with inter cultivation at 30 DAS and unweeded; four blackgram varieties, viz., GBG 1, PU 31, LBG 787, LBG 752, as sub treatments which were replicated thrice.Result: Weed dry matter recorded at 45 days was lower and weed control efficiency (WCE) was higher with pendimethalin 1.0 kg ha-1 PE fb imazethapyr 50 g ha-1 PoE and was on par with manual weeding with inter cultivation. All the varieties were comparable and equally effective in controlling weed dry matter. Yield of variety GBG 1 was higher due to higher yield attributes viz., no. of pods per plant and 100 seed weight. Among the weed control methods manual weeding treatment with inter cultivation recorded significantly higher yield followed by a combination of pendimethalin 1.0 kg ha-1 PE fb imazethapyr 50 g ha-1 PoE. Further, varieties GBG 1 and PU 31 performed better in manual weeding treatment with intercultivation and without any herbicide use.

scholarly journals Studies on nitrogen and phosphorus management in Wheat (Triticum aestivum L.emend Fiori & Paol) under rainfed conditions of Jammu and Kashmir

2016 ◽  
Vol 4 (3) ◽  
pp. 420
Author(s):  
Narinder Panotra ◽  
Vinod Gupta ◽  
Vishal Sharma ◽  
Ashwani Kumar
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Agricultural Research ◽  
Growth And Yield ◽  
Research Station ◽  
Nitrogen And Phosphorus ◽  
Jammu And Kashmir ◽  
Yield Attributes ◽  
Rainfed Conditions ◽  
Phosphorus Application

<div><p class="Default"><em>A field experiment was conducted to evaluate the effect of three levels each of nitrogen (0, 60 and 120 kg/ha) and phosphorus (0, 40 &amp; 80 Kg/ha) on Wheat (Triticum aestivum L.emend Fiori &amp; Paol) cultivar ‘VL 907’ during Rabi 2013-14 and 2014-15 at Regional Agricultural Research Station Rajouri, SKUAST-Jammu under rainfed conditions of Jammu and Kashmir. Application of graded levels of nitrogen and phosphorus progressively improved growth and yield attributes but in a decreasing order. There was a progressive increase in grain yield of wheat with each increment from 60 to 120 kg N ha-1 from the crop fertilized being maximum from 120 kg P ha-1. Similarly, application of 80 kg/ha resulted higher grain yield than the yield obtained in control. Lowest plant height, number of effective tillers per plant, panicle length, dry matter per plant, number of grains per panicle, weight of grains per panicle, grain yield, straw yield and biological yield was observed in 0 and 50 per cent nitrogen and phosphours. </em><em>Various crop traits such as number of fertile tillers, 1000-grain weight and number of grains per spike were significantly influenced by nitrogen and phosphorus application. Similarly, fertilization with at 120 kg N ha-1 and 80 kg P ha-1 maximally improved all these traits in both the years.</em><em> </em></p></div>

Effect of Gibberllic acid on Growth, Yield and Economics of Maize (Zea mays L.)

2018 ◽  
Vol 5 (01) ◽  
Author(s):  
MAHENDER S. SINGH ◽  
NARENDRA KUMAWAT ◽  
I. S. TOMAR ◽  
T S. DUDWE ◽  
R. K. YADAV ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Grain Yield ◽  
Plant Height ◽  
Field Experiments ◽  
Agricultural Research ◽  
Foliar Application ◽  
Block Design ◽  
Research Station ◽  
Yield Attributes ◽  
Stover Yield

The aim of present investigation was to study the effect of foliar application of gibberellic acid (Progibb 40% WSG) spraying at 4-5 leaves stage of the maize crop. Two field experiments were conducted during kharif 2014 and rabi 2014-15 at Research Farm, Zonal Agricultural Research Station, Jhabua. Seven treatments (T = 20, T 30, T 40, T 50 T 60 gibberellic acid g/ha, Tricontanol 1 2= 3= 4 = 5= 0.1%= 250 ml/ha and control) were tested in randomized block design with three replications. Results showed that variation in different doses of gibberellic acid had significant effect on growth character (plant height and silking) and yield attributes (no. of cobs/plant, cob length, no. of grains/cob and cob weight/cob); grain yield and stover yield of maize in both the seasons. Higher values of plant height (197.33 and 205.5 cm) and silking (53.67 and 54.67) was recorded with the spraying of gibberellic acid @ 60 g/ha in both the seasons, respectively. Similarly the higher yield attributes viz., no. of cobs/plant (1.48 and 1.49), cob length (17.40 and 17.78 cm), no. of grains/cob (443.33 and 456.67) and cob weight/cob (93.2 and 97.32) were recorded with the application of gibberellic acid @ 50 g/ha in both the seasons, respectively. Application of gibberellic acid @ 50 g/ha produced highest grain yield (3522 and 4277 kg/ha) and stover yield (51.05 and 5413 kg/ha) which was statistically at par with doses of 40 g/ha, 60 g/ha and tricontanol 0.1% @ 250 ml. The maximum gross return (Rs. 56,347 and 65,854), net return (37,722 and 47,229), B: C ratio (3.03 and 3.54), production efficiency (32.49 and 37.19 kg/ha/day) and economic efficiency (339.84 and 410.69 Rs./ha/day) recorded with gibberellic acid @ 50 g/ha. Enhancing of production, productivity and profitability of maize under Jhabua Hill of Madhya Pradesh gibberellic acid applied @ 50 g/ha at 4-5 leaf stage of crop.

scholarly journals Influence of Zeolite Application on Growth, Yield and Yield Attributes of Finger Millet (Eleusine coracana L.) in Rainfed Condition

2021 ◽  
pp. 43-58
Author(s):  
M. N. Shivakumara ◽  
R. Krishna Murthy ◽  
G. S. Jagadeesha
Keyword(s):  
Finger Millet ◽  
Agricultural Research ◽  
Growth Yield ◽  
Pooled Analysis ◽  
Growth And Yield ◽  
Research Station ◽  
Higher Plant ◽  
Yield Attributes ◽  
Rainfed Condition ◽  
Matter Production

A field experiment was conducted at Zonal Agricultural Research Station, Gandhi Krishi vigyana Kendra, Bengaluru during kharif-2017 and 2018 to study the influence of zeolite application on growth and yield of finger millet crop. The pooled analysis showed significantly higher plant height recorded in the treatment which received zeolite 50 kg ha-1 +125 per cent RDF (Recommended dose of fertilizer)  which was at par with the treatment which received zeolite 50 kg ha-1 +100 per cent RDF in 30, 60, 90 and at Harvest stage. The number of tillers per hill (3.44), total dry matter production (41.67 g hill-1), number of fingers per ear head (5.95), straw yield (36.07 q ha-1) and grain yield (48.00 q ha-1) was recorded in the treatment received zeolite 50 kg ha-1 +125 per cent RDF which was at par with the treatment which received zeolite 50 kg ha-1 +100 per cent RDF in pooled analysis.

scholarly journals Influence of Post Emergence Application of Herbicides on Growth, Yield and Economics of Dry Direct Sown Rice

2021 ◽  
pp. 158-164
Author(s):  
A. Upendra Rao ◽  
K. Madhu Kumar ◽  
V. Visalakashmi ◽  
S. Govinda Rao
Keyword(s):  
Grain Yield ◽  
Weed Management ◽  
Agricultural Research ◽  
Block Design ◽  
Growth Yield ◽  
Amine Salt ◽  
Research Station ◽  
Net Returns ◽  
Weed Growth ◽  
Randomized Block Design

The field trial was conducted on sandy clay loam soils of agricultural research station Ragolu, A.P. India during two consecutive Kharif seasons of 2015 and 2016 .The trial was conducted in Randomized Block Design with three replications and nine treatments Viz., T1- post emergence application of Bis-pyribac sodium @ 25 g ai/ha at 20 DAS fb Amine salt of 2,4 D @ 0.58 kg ai/ha at 40 DAS; T2- post emergence application of Bis-pyribac sodium @ 25 g ai/ha at 20 DAS fb metsulfuron methyl + chlorimuron ethyl (Almix) 4 g ai/ha  at 40 DAS; T3- post émergence application Bis-pyribac sodium @ 25 g ai/ha at 20 DAS fb Ethoxysulfuron @ 20 g ai/ha  at 40DAS ; T4- post emergence application Bis-pyribac sodium @ 25 g ai/ha at 20 DAS fb  postemergence   application  of Fenoxaprop P ethyl with safenor (Rice star) @ 625ml/ha at 40 DAS ; T5- post emergence application Bis-pyribac sodium @ 25 g ai/ha at 20 DAS fb postemergence application  of Cyhalofopbutyl @100 g ai/ha + amine salt of 2,4, D @ 0.58  kg ai/ha at 40 DAS; T6- post emergence application Bis-pyribac sodium @ 25 g ai/ha at 20 DAS fb Ethoxysulfuron  @ 20 g ai/ha+ Fenoxaprop PEthyl with safenor (Rice star) @ 625ml/ha at 40 DAS; T7- Post emergece application  of Penoxulam@  25g ai/ha at 20 DAS fb amine salt of 2,4, D   @ 0.58 kg ai/ha at 40 DAS ;T8-  Two hand weedings at 20 & 40 DAS  and T9- Weedy Check. The study in dry direct sown rice on weed management by herbicides revealed that, uncontrolled weed growth in dry direct sown rice reduced the grain yield by 46 to 54 percent. Post emergence application of Bis-pyribac sodium @ 25 g ai/ha at 20 DAS  followed by Ethoxysulfuron  @ 20 g ai/ha+ Fenoxaprop P Ethyl with safenor (Rice star) @ 625 ml/ha  at 40 DAS  resulted into taller plants, maximum number of tillers/m2, The highest dry matter production at harvest, more number of panicles/m2 filled grains/panicle, 1000 grain wt, higher grain yield (82-108 %t over weedy check) Straw yield besides  higher gross returns net returns and B:C ratio  among different herbicide treatments.

Sign in / Sign up

Export Citation Format

Share Document