Sweet Corn Production Research Articles

Performance of Physiological Characteristics and Content of Sweet Corn Mutant Some Lines of Sugar (Zea mays L. saccharate Sturt.) Sied of Gamma Ray Irradiation in M1 Generation.

ABSTRACT Sweet corn has a multipurpose function. The need for this commodity continues to increase every year, while the sied of production produced by farmers have not been able to meet the needs. One effort to increase sweet corn production is by mutation techniques to assemble the genetic traits of varieties. This study aims to obtain the best interaction between sweet corn lines and gamma ray irradiation doses on physiological characteristics and sugar content in maniss corn plants (Zea mays L saccharata Sturt). This research was carried out in PT. Pertani, Sirnabaya Village, East Telukjambe sub District, Karawang start in May 2019 until September 2019. The method used is an experimental method using a factorial randomized block design. There are two factors consisting of 20 treatments. The first factor was the sweet corn with replications consisting of 5 lines, the second factor is the dose of gamma ray irradiation consisting of 4 levels. The effect of the treatment was analyzed by analysis of variance, to find out the best treatment continued with the DMRT (Duncan Multiple Range Test) test at 5% level. There was the best interaction between sweet corn lines and gamma ray irradiation dose, the best effect was on G1M1 treatment in almost all parameters of observation (plant height, number of leaves, weight of cobs with hurt, weight of cobs without hurt, long of cobs with hurt, long of cobs without hurt, diameter of cobs with hurt, diameter of cobs without hurt, sugar content, leaf area, leaf area index, crop yields). Keywords : lines, sweet corn, gamma ray irradiation, sugar content

Soil and plant growth response and trace elements accumulation in sweet corn and snow pea grown under fresh and carbonated coal fly ash amendment

AbstractWith the recent focus of using coal combustion residue fly ash in mineral carbonation for C capture, an end product, carbonated coal fly ash is generated. The physicochemical changes occur in fly ash during carbonation is hypothesized to improve its soil application potential compared to original fly ash. Therefore, in the present study, we tested carbonated coal fly ash against non‐carbonated (fresh) ash for its effect on soil, plant production, and elemental accumulation in plant parts. Plant pots of sweet corn (Zea mays L.) and snow pea (Pisum sativum L.) added with fresh or carbonated Australian coal fly ash to sandy loam Podosol soil at 5% (w/w) and 10% (w/w) mixing rates were used in the study. Alkalinity of fly ashes attenuated the strong acidity of the soil into weakly acidic to slightly alkaline ranges. Either fresh or carbonated fly ashes added trace elements such as B, Fe, Mn, Zn, Cu, Cd, Mo, Cr, Pb, and Ni into the soil which significantly enhanced the plant growth and yield compared to fly ash absent pots. Accumulation of heavy metals in plant parts were observed in fly ash‐treated pots. Fresh fly ash at 10% (w/w) application rate increased the soil salinity above admissible range and retarded the crop growth and yield. Carbonated fly ash continued to enhance the crop production of sweet corn and snow pea up to 10% (w/w) mixing rate. Carbonation has improved the fly ash from its original state to make it a safer soil amendment at higher dosages such as 10% (w/w).

Utilization of peanut shell waste and bio-slurry as organic fertilizer for sweet corn (Zea mays L. Saccharata)

The increasing demand for sweet corn (Zea mays, L.) in order to meet community nutrition has encouraged farmers to make improvements to the cultivation system. One of the important factors in the process of increasing sweet corn production is soil nutrients. Peanut shell (Arachys hypogea. L.) and bio-slurry are organic waste, when they have undergone a decomposition process they can be used as organic fertilizers. The aim of the study was to test the correct dosage of peanut shells and the concentration of bio-slurry so that it could be used as organic fertilizer for sweet corn plants. The research was conducted in the experimental garden of the Faculty of Agriculture and Animal Husbandry, University of Muhammadiyah Malang from March to May 2020. It is a factorial experiment arranged in randomized groups, the first factor is peanut shell dose: P1 = 10 tons / ha; P2 = 15 tons / ha; P3 = 20 tons / ha. The second factor is the bio-slurry concentration: B1 = 100 ml/ L; B2 = 125 ml/ L; B3 = 150 ml/ L. The results showed that there was an interaction between the peanut shell dosage treatment and the bio-slurry concentration on the growth and yield of sweet corn. Dose treatment of peanut shells on growth and yield variables of sweet corn is influenced by the concentration of bio-slurry. A combination of suitable treatment for growth and yield to sweet corn is peanut shell dose 15 tons/ ha and bio-slurry concentration 125 ml/ L.

Biochar Tablets with and without Embedded Fertilizer on the Soil Chemical Characteristics and Nutrient Use Efficiency of Zea mays

Densification of ashy biochar into tablet can enhance the handling and conveyance efficiencies of biochar. It was hypothesized that fertilizer-embedded biochar tablets can slowly release embedded nutrients in synchrony with optimum nutrient uptake by crops. The objectives of this research were to determine the effects of biochar tablets with and without embedded fertilizer on soil chemical properties and nutrient use efficiency of Zea mays (sweet corn). The biochar tablet (BT) was produced by blending a biochar mixture with starch followed by densification using a single punch tablet press whereas the fertilizer embedded biochar tablet (BF) was prepared using the same procedure except that NPK fertilizer was added during blending. A pot experiment with five fertilization treatments including control was carried out in an open field located in Perlis, Malaysia. Co-application of biochar and fertilizer increased soil total carbon, nitrogen, but it reduced soil electrical conductivity (EC). Additionally, the BF significantly increased leaf chlorophyll content, dry root weight, and total plant nutrient use efficiency of sweet corn. The findings suggest that BF can serve as a slow release fertilizer to improve crop nutrient use efficiency. Therefore, embedding fertilizer in biochar tablets is recommended for sweet corn production following a long term field study to confirm the findings of this pot study.

Risk analysis model of sweet corn production using z-score and value at risk methods

Sweet corn is one of the food commodities produced by farmers in Indonesia. In sweet corn cultivation, farmers face the risk of production originating form fertilizers, pets and weather changes. Production risks include the decrease of quality and quantity of production and farmers experiencing losses. The purposes of this study were to identify sources of farming production risk, to analyze the probabilities and impacts of risk sources, to formulate the overcoming risk strategies risk of sweet corn farming production. A total of 50 corm farmers were involved. The collected data were analyzed by using descriptive analysis, probability and impact analysis, the Z-score and Value at Risk (VaR). The biggest source of risk was pest attack with a probability of 9.63% and an impact of Rp 562.102,64/hectare followed by fertilizer with a probability 6.55% and an impact of Rp 536.600,03/hectare and weather/climate change with a probability of 2% and an impact of Rp 337.150,10/hectare. The preventive strategies used to handle pest risk sources were land sanitation and mitigation strategies, namely the provision of pesticides and insect for grasshoppers. Mitigation strategy was used to handle fertilizer risk that improving farmers’ skills in fertilizing and giving the right type of fertilizer and dosage. As for climate/climate change, the preventive strategies used wark making drainage, making high beds, watering and growing or accumulating roots.

Performance yield components of sweet corn (Zea mays Saccharata (Sturt.)) Bailey and weed growth with treatment in different kinds of fertilizer

This study aims to determine the performance yield component of sweet corn and weed density due to different kinds of fertilizer treatments. This study uses a randomized complete block design (RCBD) in factorial patterns with two factors. The first factor is biofertilizer-Arbuscular mycorrhiza fungi (biofertilizer-AMF) which consists of four levels, namely without biofertilizer-AMF (A0), biofertilizer-AMF 5 g/planting hole (A1), biofertilizer-AMF 10 g/planting hole (A2), biofertilizer-AMF 15 g/planting hole (A3). The second factor is cow manure fermented consisting of three levels, namely without cow manure (B0), cow manure 5 tons ha-1 (B1), cow manure 10 tons ha-1 (B2) with 3 replications so that there are 36 experimental units. The variables observed in this study were: cob length (cm), cob diameter (cm), number of seed rows, cob weight with husk (g), cob weight without husk (g) productivity of sweet corn plants (ton ha-1) and kinds of weeds and their absolute density. The results showed that the highest average corn crop productivity was obtained in the treatment without biofertilizer-AMF and cow manure fermented 10 tons ha-1 (A0B2) as 8.52 tons ha-1. If the combination of treatments contained biofertilizer-AMF and cow manure fermented, the highest average productivity of sweet corn was obtained in the treatment of biofertilizer-AMF 5 g/planting hole and cow manure fermented 10 tons ha-1 (A1B2) as 7.19 tons ha-1. The highest weed density from broadleaf is H.capitata (34.167%), from grasses is I.cylindrica (32.432%) and from sedges is Cyperus sp (30.21%).

Fertilization influence on biomass yield and nutrient uptake of sweet corn in potentially hardsetting soil under no tillage

BackgroundHardsetting soils are considered problem soils due to its behavior of becoming hard and unbearable to cultivate not until rewetted. Few investigations were conducted in this kind of problem soil; hence, information about biomass yield and nutrient uptake is still elusive. This study investigated the impact of potentially hardsetting soil on the biomass yield and nutrient uptake of sweet corn under no-tillage cultivation system with varying fertilization treatments.ResultsThe application of full NPK + 1 Mg ha−1 VC increased stover and grain yield by 26–106% and 11–135%, respectively. Approximately 64% and 112% of sweet corn stover and grain yield increased when treated with full NPK. Highly significant quadratic relationship (P < 0.001) was revealed between total biomass yield and nutrient uptake of sweet corn, implying that 98–99% of the variation in total biomass could be elucidated by its nutrient uptake. Further, this indicated the suitability of nutrient uptake function that could be used as an estimate in the progression of total biomass accumulation. The application of full NPK showed statistically significant (P < 0.001) nitrogen and phosphorus use efficiency across treatments. The soil in the experimental area was a potentially hardsetting soil due to its rapid soil strength development at least 4 days from wetting. This implies that with continued use, proper soil management must be implemented like reduced tillage and organic matter application to facilitate structure formation and binding of soil particles by labile fraction in organic matter.ConclusionApplication of organic amendment in combination with inorganic fertilizer could be a sustainable production strategy on sweet corn production system in potentially hardsetting soil under no tillage through enhanced nutrient uptake and biomass accumulation.

Cover crops in the production of green and sweet corn

ABSTRACT Intensive conventional tillage cultivation of both green and sweet corn can contribute to soil degradation when compared to no-till systems. This study aimed to assess the agronomic characteristics and physicochemical quality of green and sweet corn grains grown under succession planting using different cover crops. Two experiments were conducted, one with green corn and the other sweet corn, using a randomized block design consisting of seven treatments: brachiaria (B); Pearl millet (PM); showy crotalaria (SC); SC+B; PM+B; PM+SC and PM+SC+B, with four repetitions. The fresh (FW) and dry weight (DW) of the cover crops and decomposition of their residue were assessed, in addition to the agronomic performance and bromatological quality of green and sweet corn grains. Brachiaria showed the lowest FW and DW production, highest residue decomposition rate and shortest half-life when compared to the other soil covers assessed. Productivity and yield for sweet corn grains and green corn ears were not statistically affected by the different cover crop residues. The cover crop residues influenced moisture content, total titratable acidity and total soluble solids in green corn, and lipids, proteins, total soluble solids, pH and ascorbic acid in sweet corn.

Dose treatment of legume compost with the number of plants per planting hole for land efficiency and increasing sweet corn production

Sweet corn requires large nutrients for growth and production. Legume compost can be used as fertilizer to fulfill nutrients that are beneficial for plant growth. The use of legume compost can substitute NPK elements which function for plant growth. Other efforts that can be made to increase sweet corn production due to the narrowing of agricultural land are to increase the plant population, which is usually 1 plant per planting hole can now be added to 2 to 3 plants per planting hole. The purpose of this study was to determine the best dosage combination of legume compost with the number of plants per planting hole. The research was conducted in an experimental field in Politeknik Negeri Jember. The study was conducted using a factorial randomized block design (RBD) with 2 factors, namely the dose of legume compost and the number of plants per planting hole. From this study there were 9 treatment combinations and 3 replications so that there were 27 experimental units. Anova test results showed that the treatment of legume compost dosage and the number of plants per planting hole had no significant effect on the parameters of plant height, number of leaves, corn cob length, corn cob weight, corn cob diameter, and sweetness level, but had significant effect on the parameter of corn cob production per unit observation.

Influence of integrated nutrient management on production and economics of sweet corn (Zea mays L. saccharata)

A field experiment entitled “Influence of integrated nutrient management on production and economics of sweet corn (Zea mays L. saccharata)” was laid out during the rainy season 2019-20 at the Research farm of Ambikapur under rain fed condition. The experiment constituted of nine treatment combinations consisting three levels of organic manures (0 t, 3 t vermicompost and 5 t FYM) and three levels of inorganic fertilizers (50%, 75% and 100% RDF, where RDF is 120:60:40 kg ha-1 N, P2O5 and K2O) and replicated trice. The result shows that growth and yield attributes, cob and fodder yield were influenced significantly by the integration of various levels of organic and inorganic fertilizers. Highest cob yield (20486.7 kg ha-1) and the net return (₹ 147265.2 ha-1) was registered with vermicompost @ 3 t ha-1 + 100% of the RDF and were found significantly fair over rest of the treatment combinations.

Sowing time influence on the sweet corn productivity in the mountainous ecologically clean zone of Kabardino-Balkaria

With a properly selected sowing time, the highest productivity of sweet corns is achieved. In the conditions of the mountainous zone of Kabardino-Balkaria, the timing of sowing sweet corn has not been studied, therefore, determining the optimal sowing time is one of the most important issues in the successful cultivation and obtaining high yields of sweet corn. In our studies, the sowing time influenced the survival rate of sweet corn plants. Optimal sowing favors the dynamic growth and development of plants, the root system, allows better assimilation of moisture in the soil, thus increasing the growth of green mass and the formation of larger and higher quality grains. Based on the analysis of data on the structure of yields, in all respects, the second sowing period (late April - early May) is ahead of other options, especially later sowing dates. The amount of products obtained depends on the weight of one earcorn. The number of marketable earcorns drops sharply at late sowing dates. The sharp decline in the productivity of sweet corn plants is explained by the fact that in the late sowing period, the soil moisture level is at a low level due to the rise in high temperatures.

Combined effect of woodchips and biochar for sweet corn (Zea mays) production: productivity and economic efficiency of sustainable agriculture

Combined effect of woodchips and biochar for sweet corn (Zea mays) production: productivity and economic efficiency of sustainable agriculture

Combining Ability of Husk Extension, Maysin Content, and Corn Earworm Resistance

Corn earworm (Helicoverpa zea) is a destructive pest with limited management options in sweet corn (Zea mays) production. Increased husk extension and the presence of the C-glycosyl flavone maysin are two proposed mechanisms for improving corn earworm resistance in corn cultivars. A factorial mating design was conducted to test hybrid combinations of sweet corn inbreds with long husks and/or maysin to identify candidates for future cultivar development. The mating design had seven male parents, including three commercial sweet corn inbreds (Wh9261, We11401, and Wt1001) and four inbreds selected for maysin content (Maysin1, 2, 3, and 4), and five female parents, including two commercial sweet corn inbreds (Ia453su and Ia5125su) and three inbreds with long, thick, tight husks (A684su, A685su, and A686su). Hybrids were evaluated for ear length, husk length, maysin content, and corn earworm resistance at six environments in 2016 and 2017. Relationships between husk extension, maysin, and corn earworm resistance were inconsistent, but five inbreds produced hybrids with significantly lower corn earworm infestation and/or damage, demonstrating potential to confer resistance to the corn earworm.

ANALISIS PRODUKSI DAN PEMASARAN JAGUNG MANIS DI KELURAHAN KLAMALU DISTRIK MARIAT KABUPATEN SORONG PROVINSI PAPUA BARAT

Agriculture is the main sector of Indonesian people's livelihoods. The agricultural sector is able to contribute directly to economic growth and the welfare of farm households. And is one of the pillars of the national economy. This means that the agricultural sector plays an important role and should be a driver of state economic activity. Based on 2005 BPS data, the population working in the agricultural sector numbered around 41,309,776 people or 39.02 percent of the total population of productive age, while the remaining 60.98 percent was spread in various sectors outside agriculture. This study aims to (1) Know the sweet corn production produced by farmers (2) Know the factors that influence the amount of sweet corn production (3) Know the marketing of sweet corn from farmers. The method used in this research is descriptive method with survey techniques. The sampling method in this study was carried out by simple random sampling (simple randon sampling) on corn farmers. based on research results obtained. The average production produced from sweet corn farming in Klamalu Village, Mariat District, Sorong Regency is 1,827 kg / ha in one planting season, with an average land area of 0.39 Ha. The production has not reached maximum results because it has not been matched with the right cultural technology. Based on multiple linear regression analysis, it can be seen that the most influential on sweet corn production variables is the land variable with a regression coefficient of 3,492,641 (31 percent). Work outflow variable has positive and significant effect with regression coefficient value of -0.013 (39 percent). While the variable capital costs have a negative and significant effect on production. This can be indicated by a significant value (P value) of 0,000 which is smaller than 0.05. In testing hypotheses using the F test (together or simultaneously) it can be explained that the five variables namely price (X1), production costs (X2), land (X3), production (X4), transportation costs (X5) and competitor prices (X6) together affect the bid (Y). This is indicated from the calculated F value of 11.186 with a significance number (P Value) of 0.047. The coefficient of determination (R2) produced is 0.64. This means that 64 percent of the change in the supply variable (Y) can be explained by changes in the land variable (X1), capital (X2), work flow (X3), together, while the remaining 36 percent is explained by other variables not available in this research. There are only 2 sweet corn trading channels in the Kelurahan klamalu Mariat District, namely: Consumer Farmers; Pedagag Farmers Consumer Retailers. The average profit received by farmers is greater than Rp. 21,884,309, compared to farmers who sell sweet corn products at retailers only at Rp. 568,167. Based on the calculation results, the efficiency of the trading system obtained by retailers is greater than 100% which is 1,170%. This shows that the trading agency is efficient. Based on the results of the study, there are several obstacles faced by farmers in the Klamalu District of Mariat District, Namely: The capital owned by farmers is limited, 2. Availability of fertilizer which is not always available, 3. The absence of marketing institutions in the form of cooperatives and traders, 4. Marketing areas that are limited.

Response of sweet corn (Zea mays L. var. saccharata) to vermicompost and inorganic fertilizer application

This study was conducted to determine the appropriate rate of vermicompost that would influence the agronomic performance and evaluate the effect of combining the different vermicompost rates and the specific rate of inorganic fertilizer that could effectively promote the growth and yield of sweet corn. The experiment was conducted in a Randomized Complete Block Design (RCBD) with ten (10) treatments and three (3) replications. The treatments are as follows: T1 – 120-90-60 kg ha-1 inorganic fertilizer or farmers’ practice, T2 – 5 t ha-1 vermicompost + 102-76.5-51 kg ha-1 inorganic fertilizer, T3 – 10 t ha-1 vermicompost + 96-72-48 kg ha-1 inorganic fertilizer, T4 – 20 t ha-1 vermicompost + 84-63-42 kg ha-1 inorganic fertilizer, T5 – 40 t ha-1 vermicompost + 60-45-30 kg ha-1 inorganic fertilizer, T6 – no application (control group), T7 – 5 t ha-1 vermicompost, T8 – 10 t ha-1 vermicompost, T9 – 20 t ha-1 vermicompost, and T10 – 40 t ha-1 vermicompost. Results of the study revealed that the different treatments influenced the ear yield (husked and unhusk), kernels per ear, weight per ear, percentage of marketable ears, percentage of barren plants, and percentage of double ears. The treatments 1 to 5 yielded significantly higher compared to the control treatment (T6) which implies that the application of vermicompost with 50 - 85% of the farmers’ practice had significant improvement in sweet corn production. The application of 20 t ha-1 vermicompost + 70% of farmers’ practice achieved the highest yield at 12.50 and 15.80 t ha-1 husked and unhusk ears respectively. Highest percentage of double ears at 29.69% was attained on the plants applied with 40 t ha-1 vermicompost + half of farmers’ practice. The yields of sweet corn applied with vermicompost alone were not comparable to treatments applied with inorganic fertilizers.

RESPONS TANAMAN JAGUNG MANIS (Zea mays saccharata Sturt) TERHADAP PUPUK UREA, SP36, dan KCL DOSIS

Sweet corn is one of the agricultural commodities that is widely consumed because it contains various nutrients that are needed by the human body. Sweet corn production is strongly influenced by several things, including the adequacy of nutrients in the soil. To meet the needs of plant nutrients can be done through fertilization activities. The effectiveness of fertilization is strongly influenced by the dose, type, method and time of application. This study aims to determine the growth and yield of sweet corn plants due to the application of Urea, SP36, and KCl fertilizers with different doses. The results showed that the treatment using Urea, SP36, and KCl fertilizers with different doses had a significant effect on the variables of plant height, weight of cobs with beans, and weight of cobs without beans. However, there was no significant difference in the number of leaves, ear diameter, dissolved solids, and yield per hectare

Застосування препарату регоплант у зрошуваних умовах південного степу України на кукурудзі цукровій

The article is devoted to the study of the influence of the growth-regulating drug Regoplant on the productivity and growth processes of sugar corn in the conditions of the Southern Steppe of Ukraine on dark chestnut soils under irrigation. The aim of the work was to formulate current recommendations for agricultural producers on the use of the growth-regulating drug Regoplant, the selection of hybrids and the scheme of sowing sugar corn, based on the results of field experiments. Materials and methods. Studies to study the effect of the Regoplant preparation, the hybrid composition and the schemes of sowing sugar corn on the productivity of the crop were carried out on dark chestnut slightly solonetzic soils in the Kherson region. The experiment was carried out in four repetitions, in full accordance with modern requirements for the implementation of field experiments in agronomy. Regoplant preparation was used at a dose of 50 ml / ha in the phase of 7-8 leaves. The modern hybrids of the MNAGOR selection - Deyneris F1, Champion F1, NBM-2020 F1 were put to the study. Sowing patterns of the culture - 70 × 10 cm, 70 × 20 cm, 45 × 20 cm, 45 × 30 cm. Growth processes were assessed by the height of the plants in the panicle flowering phase, the crop yield was determined by the mass of marketable ears in wrappers collected from the experimental plot manually and weighed on an electronic analytical balance. Statistical processing of research results was performed at 95 % confidence level in the AgroStat software product. Results. All studied factors influenced the growth processes and productivity of sweet corn. The highest height (185.50 cm) of the crop plants was reached in the variant with the Daenerys F1 hybrid, where the treatment with the Regoplant preparation was not performed, with a seeding pattern of 45 × 30 cm, the minimum plant height was recorded in the areas of the NBM-2020 F1 hybrid with a seeding pattern of 70 × 20 cm and treatment with Regoplant preparation - 125.50 cm. The maximum yield was achieved on the variant with the NBM 2020 F1 hybrid with a seeding scheme of 45 × 30 cm and treatment with the growth-regulating preparation Regoplant in the phase of 7-8 leaves of the culture with a dose of 50 ml / ha - 25, 34 t / ha. The lowest crop yield was obtained on the variant with the Champion F1 hybrid with a seeding scheme of 45 × 30 cm and without treatment with Regoplant - 6.72 t / ha. Conclusions. According to the results of the studies, we consider it expedient to recommend for sowing in the South of Ukraine on dark chestnut soils with irrigation a hybrid of sugar maize NBM-2020 F1 according to the scheme 45 × 30 cm and to process the growth-regulating drug Regoplant in the phase of 7-8 leaves of the culture with a dose of 50 ml / ha. This combination of agrotechnical factors ensured the maximum crop yield in the experiment - 25.34 t / ha of marketable ears in wrappers.

The role of ACC deaminase producing bacteria in improving sweet corn (Zea mays L. var saccharata) productivity under limited availability of irrigation water

Accumulation of stress ethylene in plants due to osmotic stress is a major challenge for the achievement of optimum sweet corn crop yield with limited availability of irrigation water. A significant increase in earth’s temperature is also making the conditions more crucial regarding the availability of ample quantity of irrigation water for crops production. Plant growth promoting rhizobacteria (PGPR) can play an imperative role in this regard. Inoculation of rhizobacteria can provide resistance and adaptability to crops against osmotic stress. In addition, these rhizobacteria also have potential to solve future food security issues. That's why the current study was planned to examine the efficacious functioning of Pseudomonas fluorescens strains on yields and physiological characteristics of sweet corn (Zea mays L. var saccharata) under different levels of irrigation. Three irrigation levels i.e., 100% (I100 no stress), 80% (I80), and 60% (I60) were used during sweet corn cultivation. However, there were four rhizobacteria strains i.e., P. fluorescens P1, P. fluorescens P3, P. fluorescens P8, P. fluorescens P14 which were used in the experiment. The results showed that severe water stress (60% of plant water requirement) decreased chlorophyll a, chlorophyll b, and total chlorophyll contents, Fv/Fm ratio and nutrients uptake. A significant increase in F0, Fm, proline, total soluble sugars, catalase (CAT) and peroxidase (POX) activity led to less ear yield and canned seed yield. Combination of four strains significantly increased the yield traits of sweet corn i.e., ear and (44%) and canned seed yield (27%) over control. The highest promoting effect was observed in the combination of four strains treatment and followed by P1 strain in reducing the harmful effects of drought stress and improving sweet corn productivity. However, P14 gave minimum improvement in growth and yield indices under limited availability of water. In conclusion, combination of four strains inoculation is an efficacious approach for the achievement of better yield of sweet corn under osmotic stress.

Growth and Production of Sweet Corn (Zea mays var. Saccharata) with Organic and Anorganic Fertilizer in Kendal

This study aims to examine the response of growth and production of sweet corn plants in application of organic and inorganic fertilizers. The research was conducted on July - October 2019 in Merbuh Village, Singorojo Sub-District, Kendal District and at Ecology and Plant Production Laboratory, Faculty of Animal and Agricultural Sciences, Diponegoro University, Semarang. The study used a randomized block design with 7 monofactor treatments with and each experimental unit was repeated 4 times. The treatments consisted of inorganic fertilizer (P0), chicken manure+inorganic (P1), goat manure+inorganic (P2), cow manure+inorganic (P3), chicken manure ‘plus’ (P4), goat manure ‘plus’ (P5), cow manure ‘plus’ (P6). Data were analyzed by variance and for treatments that showed signoficant differences further tests were carried out using DMRT at the 5% level. The observed variables were plant height, number of leaves, stalk diameter, cob production with cornhusk, and cob production without cornhusk. The results showed that the application of organic and inorganic fertilizers only affected stalk diameter. Stalk diameter in cow manure+inorganic gave the highest results compared to other treatments. There is no influence on variables observed shows that the addition of gamal leaves as a source of N-organic and phosphate rock (BP) as P-organic in manure plus (chicken, goat, cow) can be an alternative solution to substitute inorganic fertilizers (urea and TSP) on sweet corn plant.

Effect of sowing date and some organic extracts on organic production of sweet corn

&lt;p&gt;Field experiment was conducted at the experimental farm of the Central Laboratory for Agricultural Climate, Agricultural Research Center, Giza, Egypt, during two successive seasons of 2017 and 2018. This experiment aims to improve the organic production of sweet corn via some organic extracts under different sowing dates. The seeds of sweet corn (Misthi F1 Hybrid) were planted on three different dates on 15 April, 10 May and 5 June in both seasons. Extracts of compost, vermicompost and chicken manure with applying half dose of compost were compared to full dose of compost. Results showed that early sowing had positive effect on growth, yield and ear properties of sweet corn. Applying half dose of compost with adding vermicompost extract gave the highest growth, yield and ear properties of sweet corn without significant differences compared to 50 % compost + chicken manure extract treatment in plant height and leaves number per plant. The treatments of the half dose of compost with adding any organic extracts were superior to the full dose of compost in all studied traits. This study revealed that early planting (April 15) with applying a half dose of compost + vermicompost extract produced the highest yield and quality of sweet corn ears.&lt;/p&gt;