Plant Productions - Articles List

Effect of Plant Growth Promoting Rhizobacteria (PGPR) in Yield and Yield Components of Corn Hybrid (540) under Water Stress Condition

Seyed Mohamad Reza Ehteshami; mehdi Ramezani

Volume 39, Issue 3 , December 2016, , Pages 51-64

https://doi.org/10.22055/ppd.2016.12049

Abstract

Background and Objectives Maize is the most important grain crop that has great economic importance and is grown worldwide. The largest areas under maize in Iran are in the regions ... Read More Background and Objectives Maize is the most important grain crop that has great economic importance and is grown worldwide. The largest areas under maize in Iran are in the regions with semidry and dry climates. Bio-fertilizers differ from chemical and organic fertilizers in the sense that they are cultures of special bacteria which do not directly supply any nutrients to crops. The phenomena of fixation and precipitation of P in soil caused a low efficiency of soluble P fertilizers such as superphosphate. The studies on the application of biofertilizers as replacements or supplements to mineral nutrients in the crop production show economic and ecological justification of their broad practical application and commercialisation of biofertilizers. Given the importance of water and fertilizer in agriculture, research leading to improvements in water efficiency and the use of chemical fertilizers is essential. Material and Methods In order to investigate the effect of growth promoting bacteria and different levels of phosphorus chemical fertilizer on grain yield and yield components of corn hybrid (540) under humidity different regimes, an experiment was conducted as Line source based on a randomized complete block design with three replications in Agricultural Education Center of Shahid Naseri in Karaj during 2012 and 2013. Line source was applied to four levels of irrigation (not stress, mild stress, moderate stress, severe stress). Phosphorus factor was in five levels including the application of 100% triple super phosphate fertilizer and without biofertilizer, 75% recommended chemical fertilizers with biofertilizer, 50% recommended chemical fertilizers with biofertilizer, 25% recommended chemical fertilizers with biofertilizer, biofertilizer and without chemical fertilizers, too. Results The results of the experiment showed the significant effect of fertilizer treatments on all traits both in the first and second years. In comparison, the effect of different levels of phosphorus fertilizers was investigated by the application of 100% phosphorus fertilizer and without inoculation it had the highest grain yield under non-stress conditions, while with increasing of stress intensity, grain yield in 75% recommended chemical fertilizers with biofertilizer treatment under mild stress, moderate stress and severe stress conditions was 2.1%, 5.5% and 35.8 % higher than the same treatment in similar circumstances, respectively. Discussions The result of the experiment showed that the use of plant growth promoting bacteria with a good percentage of the phosphorus chemical fertilizer, while increasing the efficiency of chemical fertilizers and soil conservation, improved grain yield under water stress conditions. The positive effect of bio-fertilizer may also be due to optimum soil pH which facilities maximum utilization of applied micronutrients to crops. Also, use of Biosuper biofertilizer had positive effects on all traits.

Performance of Sugar Beet Hybrids in Different Levels of Rhizomania Disease Severity

R. Mohammadian; S.B Mahmoudi; H Shahbazi; S Darabi; A. Pedram

Volume 39, Issue 2 , September 2016, , Pages 27-42

https://doi.org/10.22055/ppd.2016.12053

Abstract

Background and Objectives In Iran, about half of the sugar beet fields are infected by Rhizomania disease and the severity of infection in various regions is different. Then the selection ... Read More Background and Objectives In Iran, about half of the sugar beet fields are infected by Rhizomania disease and the severity of infection in various regions is different. Then the selection of appropriate varieties which could have high yields in different infected conditions is important. Material and method To compare promised resistant hybrids to rhizomania in different conditions of infection to the disease levels, an experiment was conducted in four regions including disease free and infected areas with different infection levels. In the this study, 19 monogerm diploid hybrids resistant to rhizomania were compared with foreign and domestic resistant varieties in randomized complete block design with four replications. In the disease free location, the percentage of seedlings emergence in domestic genotypes relative to the average of foreign resistance varieties, leaf number, leaf arrangement, green intensity and uniformity of crops were determined in the early growing season. At the harvest time in infected areas, the disease severity index was determined. In all areas, number, yield and quality of roots in each treatment were measured. Results Results confirmed that disease intensity of experimental regions was different. There was a significant variation among promising hybrids in the investigated properties. Discussion Generally, with increasing disease severity, root number, root yield, sugar yield, sugar content and nitrogen of roots were significantly reduced. In contrast, the gross amount of sodium and potassium increased in roots. Hybrid SB26 because of high root numbers, root yield, sugar content and sugar yield and low sodium content of root as well as low disease severity was chosen as a superior hybrid. The results of this study confirmed that also in condition of disease free, a resistant variety has better quantitative and qualitative characteristics in comparison to a susceptible variety.

Effect of Plant Growth Promoting Rhizobacteria on Morphological Traits and Essential oil Content of Moldavian Dragonhead (Dracocephalum moldavica L.)

Vafa Torfi; A D; Keramatollah Saeidi

Volume 39, Issue 2 , September 2016, , Pages 57-70

https://doi.org/10.22055/ppd.2016.12055

Abstract

Background and Objectives Dragonhead or Moldavian dragonhead (Dracocephalum moldavica L.), which belong to Lamiaceae family is an annual medicinal herbaceous and aromatic plant that ... Read More Background and Objectives Dragonhead or Moldavian dragonhead (Dracocephalum moldavica L.), which belong to Lamiaceae family is an annual medicinal herbaceous and aromatic plant that its essential oil is used widely in medicine, food, cosmetic and health industries. Due to the importance and role of medicinal plants in various industries, there is an increasing demand for herbal medicines. The indiscriminate use of chemical fertilizers has increased crop production, but has also harmed ecosystems. Some studies show that the use of some microbial species that are collectively designated as plant growth promoting rhizobacteria (PGPR) can improve yield and quality of medicinal plants. Given the importance of environmental health and food safety, this study aimed to investigate the effect of PGPR on morphological traits and essential oil content of Moldavian dragonhead. Materials and methods This experiment was conducted in randomized complete block design with eight treatments and three replications at research station of faculty of agriculture, Shahrekord university. No bacterial inoculation was used as control and seeds inoculated with Rhodococcus sp., Corynebacterium sp., Mycobacterium sp., Bacillus sp., Azotobacter sp., Pseudomonas putida, Pseudomonas fluorescens were considered as bacterial treatments. Results The results showed that all bacterial treatments had a significant effect on plant height, number of branches, number of flowering shoot, leaf dry weight, shoot dry weight, biological yield, crop growth rate (CGR), leaf area (LA), chlorophyll a, chlorophyll b, essential oil content and yield. Mycobacterium sp. treatment had the most effect on plant height, number of branches, leaf and shoot dry weight, number of flowering shoot, biomass and chlorophyll b. Bacillus sp. treatment had the most effect on leaf dry weight, number of flowering shoot, leaf area and essential oil content and yield. The highest crop growth rate and chlorophyll a were observed in Rhodococcus sp.treatment. Discussion In general, the Bacillus sp., Mycobacteriumsp., Rhodococcus sp., andPseudomonas putida treatments had the most influence on Moldavian dragonhead. Since the purpose of medicinal production is obtaining the highest content of essential oil and biomass yield, based on these results, the use of Bacillus sp., and Mycobacterium sp., bacterial inoculation treatments, as biopriming, can be recommended for increasing biomass and essential oil content in Moldavian dragonhead.

The Effect of Priming and Irrigation Water Quality on Seed and Oil yield and Yield Components of Two Sesames (Sesamum indicum L.)

Masumeh Alizadeh; h b; Alireza yadavi

Volume 39, Issue 2 , September 2016, , Pages 115-125

https://doi.org/10.22055/ppd.2016.12051

Abstract

Background and Objectives As on of the world's arid and semiarid climate regions, Iran suffers from two major problems of soil and irrigation water quality in agriculture of arid regions. ... Read More Background and Objectives As on of the world's arid and semiarid climate regions, Iran suffers from two major problems of soil and irrigation water quality in agriculture of arid regions. The first and most critical step of plant growth and development is germination; in addition, the uniformity of germination, average time of germination and emergence are also important parameters in seed quality. One of the new techniques in this regard the use of seed pretreatment that is generally referred to as priming. The aim of this study was to investigate the effect of water quality on yield and yield components of two sesame genotypes and determine the genotypes that adapt themselves quickly to changing circumstances of priming and water quality. Material and methods In order to study the effects of water quality, priming and genotypes on yield and yield components of sesame, a field experiment as split plot factorial based on RCBD with three replications was conducted in Dashtestan of Bushehr province in 2013. The main plot involves two measures of water quality (the first by the EC: 3.4 ds/m, soluble salts: 2.14 g/l, pH: 7.7, calcium and sodium: 560 and 276 ppm, and the second by the EC: 0.601 ds/m, soluble salts: 0.33 g/l, pH: 7.4 and calcium and sodium: 96 and 23 ppm) and the sub-plot consisted of factorial arrangement of genotypes (Dashtestan 2 and Line 5) and priming (salicylic acid in 25 and 50 mg per liter and NaCl in 5 and 10 grams per liter and hydro priming as a control). Ultimately, the grain yield, oil yield, yield components, length and weight of were measured capsules. Result The results showed that water quality, genotypes and priming interactions caused different changes in yield and yield components. The best genotypes and priming for number of branch, number of capsules per plant, capsule dry weight, thousand seed weight and grain yield belong to the Dashtestan 2 genotype and priming with salicylic acid in 25 mg per liter at the first water quality. Applying a second water quality led to reduction in the number of capsules, thousand seed weight and grain yield. It seems that Dashtestan 2 among the studied genotypes in the first water quality condition, with the highest grain yield, oil and yield components showed the highest rate of compliance with the experimental conditions. Discussion Background and Objectives As on of the world's arid and semiarid climate regions, Iran suffers from two major problems of soil and irrigation water quality in agriculture of arid regions. The first and most critical step of plant growth and development is germination; in addition, the uniformity of germination, average time of germination and emergence are also important parameters in seed quality. One of the new techniques in this regard the use of seed pretreatment that is generally referred to as priming. The aim of this study was to investigate the effect of water quality on yield and yield components of two sesame genotypes and determine the genotypes that adapt themselves quickly to changing circumstances of priming and water quality. Material and methods In order to study the effects of water quality, priming and genotypes on yield and yield components of sesame, a field experiment as split plot factorial based on RCBD with three replications was conducted in Dashtestan of Bushehr province in 2013. The main plot involves two measures of water quality (the first by the EC: 3.4 ds/m, soluble salts: 2.14 g/l, pH: 7.7, calcium and sodium: 560 and 276 ppm, and the second by the EC: 0.601 ds/m, soluble salts: 0.33 g/l, pH: 7.4 and calcium and sodium: 96 and 23 ppm) and the sub-plot consisted of factorial arrangement of genotypes (Dashtestan 2 and Line 5) and priming (salicylic acid in 25 and 50 mg per liter and NaCl in 5 and 10 grams per liter and hydro priming as a control). Ultimately, the grain yield, oil yield, yield components, length and weight of were measured capsules. Result The results showed that water quality, genotypes and priming interactions caused different changes in yield and yield components. The best genotypes and priming for number of branch, number of capsules per plant, capsule dry weight, thousand seed weight and grain yield belong to the Dashtestan 2 genotype and priming with salicylic acid in 25 mg per liter at the first water quality. Applying a second water quality led to reduction in the number of capsules, thousand seed weight and grain yield. It seems that Dashtestan 2 among the studied genotypes in the first water quality condition, with the highest grain yield, oil and yield components showed the highest rate of compliance with the experimental conditions. Discussion The two genotypes of sesame were different in saline conditions in terms of capsule manufacturing per plant. It seems that the salinity may limit and disrupt the balance in nutrient uptake by the roots, resulting in the production and allocation of assimilates to reproductive organs, such as decrease of the components, and reproductive organs; the salt may lead to the loss of the number of capsules per plant. In general, it seems that the number of capsules per plant of sesame ecotypes has genetic diversity and this feature can be used in breeding programs. Beneficial effects of salicylic acid on grain yield in relation to the transfer of photosynthesis assimilate in grains during grain filling that is a result of increased grain weight.

Relationship between accumulation of nitrogen compounds and sugars, and salt tolerance in rapeseed plant (Brassica napus L.)

V. Atlassi Pak; M. Nabipour; M. Meskarbashee

Volume 39, Issue 1 , June 2016, , Pages 1-1

https://doi.org/10.22055/ppd.2016.11951

Abstract

Abiotic stresses, like salinity, cause an increase in nitrogen compounds such as proline and soluble proteins in plant. In order to investigate the role of these compounds in salt tolerance, ... Read More

Detection and Selection of Effective Traits on Grain Yield in Chickpea (Cicer arientinum L.) Under Normal Moisture Condition

S.S. Moosavi; M.R. Abdollahi; F. Ghanbari; H. Kanouni

Volume 39, Issue 1 , June 2016, , Pages 119-131

https://doi.org/10.22055/ppd.2016.12046

Abstract

Background and Objectives Inequality of increasing population and food will be worse as soon as possible, because the human population is expected to increase to over 8 billion ... Read More Background and Objectives Inequality of increasing population and food will be worse as soon as possible, because the human population is expected to increase to over 8 billion by the year 2020 (Ashraf and Harris, 2006). Therefore, plant breeding is a permanent and economic method to solving the problem. Detection of effective traits on grain yield is an efficient approach to increase crop production. Among agronomy crops, chickpea plays vary important role in human life. KHalighi et al. (2011) showed that grain yield had a significant correlation with pod number per plant, seed number per plant, harvest index and biomass. In another research (Fayyaz and Talebi, 2009), the traits of number of pod and number of seed per plant were proposed as the most important traits for yield increasing in chickpea. Yucel et al. (2006) suggested that seed number per plant and pod number per plant have maximum direct effect on grain yield. Stepwise regression showed that the traits of biomass, harvest index and 100-kernel weight had great effect on chickpea grain yield, so the traits explained the main part of yield variance (Mardi et al, 2003). Detection and identifying the most effective traits on chickpea grain yield was the main objective of the current research. Materials and methods The experiment was conducted based on randomized complete block design with three replications on 18 chickpea promising lines and two cultivars (as control) under normal moisture condition in 2011-2012. The experiment was conducted in agricultural and natural resources research center of Kurdestan, Iran. The traits of day to 50 percent flowering, day to 50 percent podding, day to maturity, relative water content, number of sub-branches, number of main branches, seed number per plant, pod number per plant, plant height, 100- kernel weight, grain yield, harvest index and biomass were measured. Correlation analysis, stepwise regression analysis, and path analysis were used for identifying the best genotypes and traits in the current experiment. Phenotypic coefficient variation, genotypic coefficient variation and broad sense heritability were estimated for all traits. Results The results showed that the traits of number of sub-branch per plant, number of pod per plant, number of main-branch per plant, seed number per plant, harvest index and biomass had the maximum, positive and significant correlation with grain yield, while the trait of day to 50% flowering had the maximum, negative and significant correlation with grain yield. Stepwise regression results indicated that the traits of number of sub-branch, biomass, harvest index and day to 50% flowering (with negative beta) were the most important effective traits on the mean of grain yield and explained 97.98% of yield variance. Path analysis results confirmed the obtained results. The path analysis results showed that the traits of number of sun-branch and biomass had the maximum positive direct effect on grain yield. 100-kerenl weight and plant height had the highest and lowest heritability respectively. The maximum genotypic coefficient of variance belongs to 100-kernel weight, number of sub and main branches respectively. Meanwhile, the trait of harvest index and biomass (by increasing the number of sub-branch) had the maximum indirect positive effect on yield. As a result, increasing the sub-branch number and decreasing of day to 50% flowering may be proposed as a useful strategy for yield increase under the current experiment condition. Discussion Grain yield is a quantitative trait with low broad sense heritability. Therefore, identifying the traits correlated with grain yield is a suitable strategy for improvement and indirect selection of grain yield. Stepwise regression and path analysis are an efficient and useful statistical approach for reaching were the above aim. According to results, the traits of number of sun-branch, number of main-branch and biomass recognized as the best suitable traits for indirect grain yield selection under normal moisture stress condition.

Effect of Potassium Supply on the Activity of Some Antioxidant Enzymes of Two Durum Wheat Cultivars under Salt Stress

S.M. Alavi matin; A. Rahnama; M. Meskarbashee

Volume 38, Issue 4 , March 2016, , Pages 1-12

https://doi.org/10.22055/ppd.2016.11828

Abstract

Abstract Potassium plays an important role in improving plant tolerance to a biotic stresses such as salt stress. In order to evaluate the effect of potassium on alleviating the adverse ... Read More

Study of Drought and Salinity Stress Effect on Some Physiological Characters of Two Canola (Brassica Napus L.) Varieties in Ahvaz

F. Yousefi; P. Hassibi; H. Roshanfekr; M. Meskarbashee

Volume 38, Issue 4 , March 2016, , Pages 25-34

https://doi.org/10.22055/ppd.2016.11830

Abstract

The aim of this study was to investigate the sole and combined effects of drought and salinity stresses on some physiological characters of two canola varieties in Ahvaz as outdoor ... Read More

The Effect of Ascorbic Acid and Sodium Nitroprusside Foliar Application on Photosynthetic Pigments and Some Traits of Spring Safflower under Water Deficit Stress

S. Arab; M. Baradaran Firouzabadi; H.R. Asghari

Volume 38, Issue 4 , March 2016, , Pages 93-104

https://doi.org/10.22055/ppd.2016.11845

Abstract

Abstract Nowadays, the application of antioxidants and plant growth regulators is assumed to decrease the negative effect of different stresses. Ascorbic acid and Sodium nitroprusside ... Read More

Effects of drought stress and mycorrhizal fungi on some morphophysiological characteristics of lettuce (Lactuca sativa L.)

H. Badvi; N. Alemzade Ansari; M. Mahmoodi sorestani; F. Eskandari

Volume 38, Issue 3 , December 2015, , Pages 27-39

https://doi.org/10.22055/ppd.2015.11444

Abstract

Arbuscular mycorrhizal fungi benefit from a symbiotic relationship with the plant, which is currently one of the strategies used to reduce stress. The experiment was factorial in a ... Read More

The effect of potassium on cadmium distribution and accumulation in differen t organs of durum wheat

S. Larki; A. Rahnama; A. Aynehband

Volume 38, Issue 3 , December 2015, , Pages 79-92

https://doi.org/10.22055/ppd.2015.11455

Abstract

Understanding of the mechanisms affecting root uptake, transport and grain deposition of cadmium can successfully improve the success of breeding programs aiming to produce low cadmium ... Read More

Effect of shade, organic matter and planting time on morphological and physiological characteristics of lisianthus (Eustoma grandiflorum) (Raf.) Shinn.

M. Rahnemoon far; N. Etemadi; A. Nikbakht; M. Gheisari; M.R. Sabzalian

Volume 37, Issue 3 , December 2014, , Pages 1-11

Abstract

In order to investigate the effect of shade, organic materials and planting time on characters of Lisianthus, a completely randomized design experiment was conducted in greenhouse of ... Read More

Allelopathic effects of walnut decomposed leaf extract on some physiological traits of wild oat (Avena fatua L.)

E. Ghojavand1; A. Danesh-Shahraki2; A. Tadayon

Volume 37, Issue 3 , December 2014, , Pages 13-21

Abstract

In order to evaluate the allelopathic effects of decomposed walnut leaf extract on some physiological traits of wild oat (Avena fatua L.) an experiment was conducted in Shahrekord University ... Read More

Influence of three species of mycorrhizal fungi (Glomus SPP.) on physiological characters of wheat under the salinity conditions

S. Habibi; M. Meskarbashee; M. Farzaneh

Volume 37, Issue 3 , December 2014, , Pages 37-52

Abstract

Effect of different levels of potassium on soluble carbohydrate remobilization in two bread wheat cultivars (Triticum aestivum L.)

A. Alizadeh; M. Nabipoor; A. Rahnama

Volume 37, Issue 3 , December 2014, , Pages 69-82

Abstract

Side transportation of storage carbohydrates is one of the most important physiological indices in yield formation. In order to study potassium variation levels (200, 300 and 400 mg ... Read More

Response to direct and indirect selection of grain yield, oil and yield components in canola varieties under normal and soil moisture stress

M. Jafarzadeh ghahdrijani; M.M. Majidi; A.F. Mirlohi; M. Ebrahimiyan

Volume 37, Issue 3 , December 2014, , Pages 129-141

Abstract

Breeding based on selection indices is an effective method for improving complex traits such as yield. To assess the efficiency of different selection indices 28 cultivars of canola ... Read More

Study of soybean genotypes reaction to the application of bacteria and different nitrogen levels in North Khouzestan conditions

S.A. Kalantar Ahmadi; J. Daneshian; S.A. Siadat

Volume 37, Issue 2 , September 2014, , Pages 1-13

Abstract

In order to study the effect of different levels of nitrogen and bacteria application on the yield of soybean genotypes, an experiment was conducted at Safiabad Agricultural Research ... Read More

The effect of chilling stress on anti-oxidative enzymes activity in two rice (Oryza sativa L.) cultivars

Z. Hasannejad; S.M. Seyyednejad; Abdol Ali Gilani; P. Hassibi

Volume 37, Issue 2 , September 2014, , Pages 27-37

Abstract

In order to investigate the chilling effect and consequently oxidative stress on anti-oxidant system of two rice cultivars a field experiment was conducted in Research Center of Agriculture ... Read More

The evaluation of some growth and physiological indicators and enzymatic activities in Conocarpus erectus L. under oil sewage and calcium oxide treatments

E. Rezazadeh Katehsari; R. Fotouhi Ghazvini; V. Jafarian; l. abdoli

Volume 37, Issue 2 , September 2014, , Pages 63-73

Abstract

The identification of plants that are able to grow in the presence of oil pollutants or be effective in reducing pollution is very important. The experiment was acnducted in order to ... Read More

Effect of plant-derived smoke extrat on some under- ground and above-ground traits of winter wheat

S.S. Moosavi; M.R. Abdollahi; H. Mazahery laghb; B. Mehrshad

Volume 37, Issue 1 , June 2014, , Pages 81-92

Abstract

The present study was conducted to determine the effect of plant-derived smoke extract on some under-ground and above-ground traits of two winter cultivars of wheat (Pishgam and Navid) ... Read More

Evaluation of yield and yield components of safflower (Carthamustinctorius L.) under plant residues treatments, nitrogen and micro elements in Ahvaz

S.N. Ghaemmaghami; M. Meskarbashee; A.A. Moezzi

Volume 37, Issue 1 , June 2014, , Pages 119-130

Abstract

In order to investigate the yield and components of safflower under plant residue treatments, nitrogen and micro element in Ahvaz, this experiment was conducted during 2010-2011 cropping ... Read More

Isolation of Azospirillum and evaluation of the effect of four superior isolates on the germination of Canola seeds

N. Ghaderi; M. Olamaee; M.H. Arzanesh; Y. Mohammadnezhad; A.R. Rabiezadeh

Volume 37, Issue 4 , March 2014, , Pages 9-21

Abstract

Azospirillum is one of the plant growth-promoting bacteria which is in the rhizosphere and the intercellular of the cereals and other plant roots. One of the characteristics of this ... Read More

Evaluating the effects of water quality and ammonium sulfateon glyphosate herbicide efficiency in weed control of a barberry (Berberis vulgaris) garden

P. Yadegar Khosravieh; S.V. Eslami; M. Jami ALahmadi; E. Zand

Volume 37, Issue 4 , March 2014, , Pages 23-34

Abstract

To evaluate the effects of water quality and adjuvant (ammonium sulfate) in glyphosate herbicide efficiency, a factorial experiment based on RCBD with three replications was conducted ... Read More

The effect of arbuscular mycorrhizal fungi on plant growth and essential oil content of Ocimum basilicim l.

M. Zolfaghari; V. Nazeri; F. Sefidkon; F. Rejali

Volume 37, Issue 4 , March 2014, , Pages 47-56

Abstract

The potential of three arbuscular mycorrhizal fungi to enhance the production of essential oil and plant growth parameter was investigated in sweet basil (Ocimum basilicum). The experiment ... Read More

Effect of gamma ray treatment on seed germination traits and seedling growth of Agropyron elongatum and Bromus tomentellus

A. Alizadeh; G.A. Dianati Tilaki; B. Naserian Khiabani

Volume 37, Issue 4 , March 2014, , Pages 69-77

Abstract

In this study seeds of two important rangeland species were treated with 3, 6, 15, 20, 30, 50, 100 and 150 Gy of gamma ray and its effect on germination traits was investigatedin range ... Read More

Volume 46 (2023)

Volume 45 (2022)

Volume 44 (2021)

Volume 43 (2020)

Volume 42 (2019)

Volume 41 (2018)

Volume 40 (2017)

Volume 39 (2016)

Volume 38 (2015)

Volume 37 (2014)

Volume 36 (2013)

Volume 35 (2012)

Volume 34 (2011)

Volume 33 (2010)

Volume 32 (2009)

Main Subjects = A: Agronomy

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