Green Ear Yield Research Articles

Phenological, growth, and yield responses of sweet corn to elevational air temperatures in the humid tropics

Temperature plays a determinant role in the rate of plant metabolic activities and, accordingly, dictates the plant's phenological stages, growth, and productivity. The objective of this study was to evaluate the phenological, growth, and ear yield behavior of ten sweet corn hybrids in response to elevational temperature changes in the humid tropics. Seeds of ten hybrids were grown in three elevations (coastland, midland, and highland). Results show that the hybrids belonged to the same maturity group with comparable accumulated growing degree days, but they varied in green ear yield, harvest index, and heat use efficiency. It was also found that higher elevations lead to longer plant growth and fewer growing degree-day requirements, resulting in increased in biomass accumulation for ear and overall vegetative growth but more efficient in the heat use. These findings will be useful as a guide for crop management scheduling, including fertilizers application, pest control, diseases control, and weed control, to maximize sweet corn yield at different elevations in the humid tropics.

Development of heterotic hybrids of sweet corn for green ear yield and other component traits

Forty two experimental hybrids generated through full diallel mating were evaluated in Randomized Block Design during kharif 2019 to study the magnitude of heterosis in sweet corn. Mid-parent heterosis ranged from -21 to 258 for DEW; -25 to 2 for GFW; 3 to 229 for GEY and standard heterosis ranged from 2.13 to 134.95 for DEW; 82.93 to 317.07 for GFW; -15.70 to 68.40 for GEY. Green ear yield exhibited positive significant correlation of mid-parent and commercial heterosis with NKPR, DEW and GFW in common, while no significant association between GEY and TSS was observed. The crosses KH1831 × SC Syn, SC Syn × SC Sel 2 and SC Sel 2 × SC Syn manifested highest mid-parent heterosis for de-husked ear weight, green ear yield and green fodder weight thus utilizing these hybrids in breeding programmes will serve for dual purpose of yield with fodder. Bangladesh J. Bot. 52(4): 999-1005, 2023 (December)

Doğu Akdeniz koşullarında ikinci ürün olarak yetiştirilen bazı hibrit mısır genotiplerinde tane ve yem verimi ile yem kalite özelliklerinin değerlendirilmesi

This research was conducted in order to guide farmers and researchers by determining grain, forage yield and yield-related traits and forage quality of different parts of the whole plant in some maize cultivars in Eastern Mediterranean ecological conditions. In this study, it was assessed grain and forage yield and fodder quality of four maize cultivars (PR91G98, SY Castaneda, SY Gladius, and SY Tuscani) cultivated under the Estern Mediterranean conditions. To determine forage quality, ear, stem and leaves of the whole plant maize were analyzed separately. To evaluate grain and forage yield, parameters like plant height, stem diameter, hay yield, dry matter yield, green leaf yield, green stem yield, ear weight, green ear yield were investigated while features such as crude protein, crude ash, organic matter, NDF, ADF, digestibility of dry matter, dry matter intake and relative feed value were examined to determine forage quality. The new maize cultivars have been updated continually; it is important to clarify the responses of new varieties to agronomic practices and forage yield, quality, grain yield, and related traits. The results of this study revealed that ear is very important for forage yield and quality. The greatest hay and grain yield were produced by PR31G98 maize cultivar. It was observed SY Tuscani had higher NDF and ADF values than other maize varieties. With this study, the importance of nutrient content according to silage yield and plant parts in second crop corn cultivation was determined. In addition, research results showed important source data for farmers and researchers regarding forage and grain yield of maize farming and production area is continually increasing.

Diversity of twenty-three sweet corn (Zea mays L. saccharata) varieties in Indonesia

Abstract. Heryanto FSS, Wirnas D, Ritonga AW. 2022. Diversity of twenty-three sweet corn (Zea mays L. saccharata) varieties in Indonesia. Biodiversitas 23: 6075-6081. One of the most well-known vegetables in Asian countries, including Indonesia. Improving superior sweet corn varieties is important in the face of increasing biotic or abiotic stresses and consumer preferences for agricultural products. Plant breeding programs rely on genetic variability and heritability information. Therefore, this study aimed to quantify the genetic diversity and heritability of 23 commercial sweet corn varieties in Indonesia. The study was conducted at the Leuwikoppo experimental field of the Department of Agronomy, Faculty of Agriculture, IPB University, Bogor, West Java, Indonesia, from August to November 2021. Twenty-three commercial sweet corn varieties (hybrid and open-pollinated) from Indonesia were planted in the field employing a randomized complete block design with 3 replications. Ear shelf life and green ear yield had a high genotypic coefficient of variation (GCV), whereas plant height, ear height, stalk length, 100-grain weight, total soluble solids, green ear shelf life, green ear weight, and ear weight had a moderate GCV. Stem diameter, leaf number, leaf length, leaf width, 50% days to tasseling and silking, anthesis, silking interval, ear length, ear diameter, ear length with the kernel, ear length percent with the kernel, kernel length, and kernel width had a low GCV. High genetic diversity was present among the trialed varieties, indicating their high potential for improvement.

Studies on correlation and path co-efficient analysis of single cross hybrids in sweet corn

A total of 42 experimental hybrids generated by diallel mating design using 7 inbred lines of sweet corn were evaluated with parents and checks during Kharif 2019 at University of Agricultural Sciences, Dharwad. Green ear yield revealed a significant correlation in the positive direction with plant height, ear height, ear length, ear girth, number of kernel rows, and number of kernels per row at both genotypic and phenotypic levels, while a negative correlation was observed with days to 50% silking and Turcicum Leaf Blight. The highest value of correlation co-efficient for green ear yield was observed with green ear yield without husk, followed by the number of kernels per row and ear girth. However, there is no significant correlation between green ear yield and Total Soluble Solids. The genotypic correlation was found to be higher than the phenotypic correlation indicating high heritability of traits. Ear girth, ear height and the number of kernels per row displayed the highest positive direct effects on yield at the genotypic level and also manifested significantly positive indirect effects via plant height, ear height, green ear weight without husk, green fodder weight and the number of kernels per row. These three traits were likewise shown to have the most positive correlation with green ear yield. As a result, these attributes can be considered while selecting sweet corn genotypes for higher green ear yield.

Studies on genetic variability, heritability and genetic advance in sweet corn for green ear yield and yield related traits

A study was carried out in sweet corn to evaluate seven inbred lines, three checks and 42 experimental hybrids during Kharif 2019. This study revealed a significant difference among the genotypes for traits studied indicating the presence of abundant genetic variability. The phenotypic co-efficient of variation ranged from 4.57 (DFS) to 36.41 (GEWH) while the genotypic co-efficient of variation ranged from 3.72 (DFT) to 25.35 (GEWH). Green ear yield without husk (25.35, 36.41); green fodder weight (22.47, 29.20) and green ear yield (24.63, 33.31) recorded high PCV and GCV values. The traits plant height (0.73), ear girth (0.61) and TLB (0.69) displayed high heritability values and none of the traits showed low heritability. Genetic advance over mean ranged from 5.71 (DFT) to 37.53 (GEY). High genetic advance over mean was observed for the traits green ear weight without husk, and green fodder weight. Moderate heritability coupled with high genetic advance was observed for the traits green ear weight without husk, green fodder weight and green ear yield. Thus, traits like green ear yield, green ear weight without husk, green fodder weight, ear length and the number of kernels per row should be prioritized while selecting sweet corn genotypes for increased yield as they have a moderate to low range of genotypic co-efficient of variation, phenotypic co-efficient of variation, heritability, and genetic advance over mean.

Application of foliar biofertilizers with and without NPK in cultivating white-glutinous corn

Organic farming used fermented fruit and plant juices as foliar fertilizers to enhance crop production. However, the usage is usually limited to sole fruit or plant fermentation with chemicals and other growth enhancers. The use of various fruits, plants, fish products, and Cyanobacteria with Mycorrhizal fungi combinations to enhance white-glutinous corn has not yet been explored. This trial investigated the different fermented fruits (FFJ), plants (FPJ), fishes (FAA), and commercial Cyanobacteria with Mycorrhizal fungi (Rhizocote) in single-use or combination with NPK to enhance the growth, yield, and Return on Investment (ROI) of cultivating white-glutinous corn. The application was 2 tbsp L-1 water for single use of fermented biofertilizers while 1 tbsp L-1 water for fermented foliar with NPK combinations. The results showed that the height of corn was not significant among treatments in 30 and 60 days after planting (DAP). However, corn treated with Rhizocote alone was the tallest in 45 DAP and had longer days to reach 50% corn tasseling. White-glutinous corn treated with Rhizocote + NPK had the highest number of ears. The rest of the treatments yielded a comparable number of ear sizes ranging from 1.27 to 1.37 cm. The highest yield of marketable green ears accounted for 7.45 t ha-1 with Rhizocote + NPK, while the lowest was observed when the white-glutinous corn was fertilized alone with FFJ at 2.93 t-ha. The Rhizocote + NPK obtained the highest R.O.I. of 263.68% compared to other treatments. Thus, the recommendation is to use 1.00 tbsp L-1 water commercial Rhizocote + recommended NPK for a productive and profitable white-glutinous corn. More investigation using different agri-fishery products fermentation at higher concentrations are needed in culture of white-glutinous corn for green ear production in various planting season.

GGE biplot analysis of genotype × environment interaction and identification of mega-environment for baby corn hybrids evaluation in India

Baby corn has emerged as one of the most important sources to augment the farmer’s income in peri-urban areas. It has diverse uses as vegetables, snacks, value-added products and assured supply of green fodder for livestock. The multilocation varietal trials mainly emphasize on the identification of new superior cultivars over commercial checks, while genotype×environment interaction (GEI) is ignored. In the current study, 13 baby corn hybrids were evaluated for green ear yield, baby corn yield and green fodder yield over eight locations (environments) in kharif seasons of 2015 and 2016 using GGE biplot analysis. The results revealed a higher proportion of the variation in the data is attributable to the environment (72.4-87.0%), while genotype contributed only 2.5-7.3% of the total variation. GEI contributed 10.5-24.1% of the total variation. Superior stable hybrids for green ear yield, baby corn yield and green fodder yield could be identified using a biplot graphical approach effectively. ‘Which won where’ plot for each of the traits partitioned testing locations into three mega-environments with different winning genotypes for different traits in respective mega-environments. Thus it can be concluded that similar inferences can be drawn from one or two representatives of each mega-environment instead of using several locations. Hence, the presence of extensive crossover GEI in baby corn multi-location trials clearly suggests the need to emphasize on smaller zonation of testing locations and location-specific breeding. Particularly in baby corn, this is the first study on GGE biplot analysis to identify mega-environments for effective evaluation of baby corn trials.

Path Analysis of Green Maize Components from Hybrids Cultivated Under Reduced Spacing

The yield and cause and effect relationships of green-ear production components of hybrids cultivated in reduced spaced environments were investigated aiming to increase the green ear harvest, as well as to identify the main characteristics that contribute most to the productivity. Four row spacings were evaluated using three commercial hybrids. The experiment lasted three months and were evaluated: plant height (PH) and ear insertion height (EIH), leaf area (LA), stem diameter (SD), total number of ears, total ear yield, number of ear with straw and without straw, yield of ears with straw (YES) and yield ear without straw (YEWS), ear length (EL) and ear diameter (ED). In addition, the full correlation in direct and indirect effects was performed by the path analysis of the PH, EIH, LA, SD, EL, ED characters on the YEWS. It was found that the reduction of spacing to 60 cm favors higher YEWS without compromising the quality, size and diameter of the green ears. However, the EL, EIH and SD are the main characters that directly and indirectly influence the yield of green ears of maize hybrids cultivated in reduced spaced environment.

Optimum plant density for crowding stress tolerant processing sweet corn

Globally, gains in sweet corn [Zea mays L.var. rugosa (or saccharata)] are a fraction of the yield advances made in field corn (Zea mays L.) in the last half-century. Grain yield improvement of field corn is associated with increased tolerance to higher plant densities (i.e., crowding stress). Processing sweet corn hybrids that tolerate crowding stress have been identified; however, such hybrids appear to be under-planted in the processing sweet corn. Using crowding stress tolerant (CST) hybrids, the objectives of this study were to: (1) identify optimum plant densities for a range of growing conditions; (2) quantify gaps in production between current and optimum plant densities; and (3) enumerate changes in yield and ear traits when shifting from current to optimum plant densities. Using a CST shrunken-2 (sh2) processing sweet corn hybrid, on-farm plant density trials were conducted in thirty fields across the states of Illinois, Minnesota and Wisconsin, from 2013 to 2017 in order to capture a wide variety of growing conditions. Linear mixed-effects models were used to identify the optimum plant density corresponding to maximum ear mass (Mt ha-1), case production (cases ha-1), and profitability to the processor ($ ha-1). Kernel moisture, indicative of plant development, was unaffected by plant density. Ear traits, such as ear number and ear mass per plant, average ear length, and filled ear length declined linearly with increasing plant density. Nonetheless, there was a large economic benefit to the grower and processor by shifting to higher plant densities in most environments. This research shows that increasing plant densities of CST hybrids from current (58,475 plants ha-1) to optimum (73,075 plants ha-1) could improve processing sweet corn green ear yield and processor profitability on average of 1.13 Mt ha-1 and $525 ha-1, respectively.

VERMICOMPOST APPLICATION IMPROVING SEMIARID-GROWN CORN GREEN EAR AND GRAIN YIELDS

ABSTRACT Intensive corn farming quickly depletes soil organic matter in the nutrient-poor soils of the Brazilian semiarid region. Application of vermicompost, an excellent organic fertilizer, could help solve that problem. This study evaluated the effect of applying Eisenia fetida vermicompost in the seeding furrows, at 0, 2, 4, 6, 8, and 10 Mg.ha-1 application rates, on the green ear yield and grain yield of two corn cultivars. Treatments were replicated five times with split-plots (vermicompost application rates within plots) in a completely randomized block design. The number of mature ears, number of kernels per ear (cultivar BR 106), and 100-kernel weight (cultivar AG 1051) were not affected by vermicompost application rate. However, vermicompost application increased total number and weight of unhusked and husked marketable green ears as well as grain yield. Total number of green ears was higher in cultivar BR 106 than in cultivar AG 1051. Conversely, grain yield and total ear weight and marketable weight of unhusked and husked green ears was higher in cultivar AG 1051, but responses in the latter two traits were dose-dependent.

CORN-TREE PROXIMITY EFFECTS IN AGROFORESTRY EXPERIMENTS

ABSTRACT In agroforestry systems, annual plants closest to trees may behave differently from plants in rows that are more distant. This study evaluated the proximity effects of Mimosa caesalpiniifolia (sabiá) and Gliricidia sepium (gliricidia) on corn yield under the taungya and alley cropping systems. The two species were evaluated, in randomised blocks with five replications, in 2010 and 2011, under taungya and alley cropping, respectively. Three rows of corn (left, middle, and right) were grown between two rows of trees. Sabiá trees grew higher than gliricidia trees. The difference in crown diameter between species depended on plant age. There was a linear relationship between plant age and plant height and between plant age and crown diameter for both sabiá and gliricidia trees. In the taungya system, left rows produced more green ears than middle and right rows, but grain yield was higher in middle rows. In the alley system, green ear yield was also higher in left rows than in middle and right rows, but grain yield was unaffected by row position. In both agroforestry systems, there were no differences in corn yield for corn grown between sabiá or gliricidia trees.

GROWTH OF ARBOREAL LEGUMINOUS PLANTS AND MAIZE YIELD IN AGROFORESTRY SYSTEMS

ABSTRACT Forest plantation costs can be reduced by the income from annual crops that are intercropped with trees. An experiment was carried out over two years to assess the viability of agroforestry systems including sabiá (Mimosa caesalpiniifolia), gliricidia (Gliricidia sepium) and maize (cultivar AG 1051). In 2010, the legumes were grown both as monocrops and intercropped (taungya system) with maize in randomized blocks with five replications. Three rows of maize were planted between two rows of each legume (at a spacing of 4.0 m x 4.0 m). In 2011, the legumes were cut down, and the young branches and leaves were added to the areas of intercropped cultivation (alley cropping system). Gliricidia had lower plant height than sabiá. Moreover, while not affecting for gliricidia, intercropping increased plant height for sabiá. Intercropping reduced green ear yield but not grain yield and reduced the cost of introducing reforestation. Intercropping using the alley system reduced the total number and mass of green ears, as well as grain yield, but did not influence the yield of marketable green ears. Finally, producing green ears was more profitable than producing grain and maize monocropping provided a higher net income than intercropping.

Mimosa caesalpiniifolia intercropping, weeds removal and nitrogen fertilization on maize

ABSTRACT: Weeding is expensive and laborious, and some weeds may re-establish themselves afterwards. Arboreal leguminous plants can control weeds, and fertilization with nitrogen can increases the competitive ability of the maize. The aim of this work was to evaluate the effects of weed-removal and intercropping with sabiá (Mimosa caesalpiniifolia) on control of weed plants and maize productivity. A randomized complete block design in a split-plot arrangement was used with five replications. Cultivar AG 105, fertilized with nitrogen (30 and 120 kg/ha of N applied to the plots) was subjected to the following treatments (subplots): A) no weeding; B) intercropping with sabiá (30 viable seeds/m2, broadcast between the rows of maize); C) hoeing {20 and 40 days after sowing (DAS)} with no removal of weeds (nROW); D) two hoeings at 20 and 40 DAS with ROW at 20 DAS; E) two hoeings at 20 and 40 DAS with ROW at 40 DAS; F) and two hoeings at 20 and 40 DAS with ROW after each hoeing. Increasing the dose of nitrogen reduced the growth of the sabiá (30%) and weeds (32%) and increased the corn green ear yield (115%) and grain yield (40%) of maize. Sabiá did not reduce the growth of weeds, but it was beneficial to corn because increased the number of green ears. Carrying out two hoeings, with or without the removal of weeds, reduced weed growth (92%) and provided the highest yields of green ears (5.6 t/ha) and grains (6.0 t/ha).

Effects of ground cover from branches of arboreal species on weed growth and maize yield

Cultivating maize under systems of alley cropping results in improvements to the soil, a reduction in weeds and an increase in yield. Studies using ground cover from tree shoots produce similar results. The aim of this study was to evaluate the effects on weed growth and maize yield of ground cover made up of 30 t ha-1 (fresh matter) of branches from the tree species: neem (Azadirachta indica A. Juss), gliricidia (Gliricidia sepium (Jacq.) Kunth e x Walp.), leucaena (Leucaena leucocephala (Lam.) de Wit.) and sabia (Mimosa caesalpiniifolia Benth.). Two treatment groups (cultivars and weed control) were evaluated. The cultivars AG 1041 and AL Bandeirantes were subjected to the following treatments: no hoeing, double hoeing, and ground a cover of branches of the above species when sowing the maize. A randomised block design was used with split lots (cultivars in the lots) and ten replications. The cultivars did not differ for green ear or grain yield. Double hoeing was more effective than ground cover at reducing the growth of weeds. However, both weeding and ground cover resulted in similar yields for green ears and grain, which were greater than those obtained with the unweeded maize.

Genetic Analysis of Maize (Zea mays L.) Genotypes for Baby Corn, Green Ear and Grain Yield

Most maize cultivars have been developed for grain production. Considering the diversified uses of maize, interest has been demonstrated for the evaluation of maize hybrids with regard to their baby corn, green ear and grain yield production ability. In the present work seventeen corn cultivars were evaluated in the yield of baby corn, green ears and dry grains. Two experiments were carried out in the same season, in neighboring areas and managed in a similar way in Birsa Agricultural University, Ranchi, Jharkhand, India in a randomized blocks design with three replicates. Baby corn yield was evaluated in one of the experiments. The other experiment was set to evaluate green ear and dry grain yield. The inbreds BQPM-4 and BAU1M-4 were found to be the most productive with respect to the weight of marketable husked and unhusked baby corn ears. The inbreds BAU1M-4 and BQPM-2 were the most productive with respect to number and weight of marketable husked green ears and grain yield. Therefore, the cultivars differ with each other when different corn exploiting purposes are taken into account.

Doses de resíduos foliares de carnaubeira e rendimentos do milho

O rendimento do milho pode ser aumentado com a aplicação de doses de resíduos de espécies vegetais perenes. Muitos agricultores do Nordeste do Brasil utilizam resíduos de folhas da carnaubeira, uma palmeira nativa dessa região, para suprir as deficiências dos solos pobres em matéria orgânica. O objetivo do trabalho foi avaliar os efeitos da aplicação de doses de resíduos foliares da carnaubeira sobre o rendimento de espigas verdes de duas cultivares de milho. O estudo foi complementado pela avaliação também do rendimento de grãos. Doses de resíduos foliares (0, 2, 4, 6, 8 e 10 t ha-1) foram aplicadas nos sulcos de semeadura de cultivares de milho (AG 1051 e BR 106). Utilizou-se o delineamento de blocos ao acaso com cinco repetições e parcelas subdivididas (doses nas parcelas). O aumento da dose de resíduos foliares aumentou o número total, o número e a massa de espigas verdes empalhadas comercializáveis (BR 106), as massas total e de espigas verdes despalhadas comercializáveis e o rendimento de grãos (AG 1051 e BR 106). Mas a aplicação de resíduos foliares da carnaubeira não influenciou os números total e de espigas empalhadas comercializáveis, massa de espigas empalhadas (AG 1051), e o número de espigas despalhadas comercializáveis (AG 1051 e BR 106). A cultivar BR 106 foi superior à cultivar AG 1051 nos números total e de espigas verdes empalhadas comercializáveis e o contrário ocorreu nas massas de espigas verdes e no rendimento de grãos.

Controle de plantas daninhas na cultura do milho com gliricídia em consorciação

A gliricídia (Gliricidia sepium) é leguminosa perene, cultivada para propósitos múltiplos, que apresenta crescimento rápido e várias substâncias com propriedades alelopáticas. Existem indicações de que a consorciação com gliricídia também pode trazer benefícios no controle das plantas daninhas do milho. O objetivo deste trabalho foi avaliar o controle das plantas daninhas no milho (híbrido duplo AG 1051) com gliricídia em consorciação. Utilizou-se o delineamento em blocos completos casualizados, com oito repetições. Os tratamentos consistiram em: cultivo do milho com capinas (duas, aos 20 e 40 dias após a semeadura), sem capinas e em consorciação com a gliricídia. A gliricídia foi semeada a lanço, com 25 sementes m-2, por ocasião da semeadura do milho, entre as fileiras deste. Quinze espécies de plantas daninhas foram catalogadas na área experimental, sendo Commelina benghalensis a mais frequente. Os rendimentos de espigas verdes (empalhadas e despalhadas) obtidos com a consorciação foram iguais ou superiores a 85% dos rendimentos obtidos com capinas. Além disso, o rendimento de grãos no consórcio chegou a 80% do rendimento de grãos do milho capinado. Portanto, a consorciação com a gliricídia pode ser uma alternativa viável para as produções de milho verde e de grãos, embora essa consorciação não tenha influenciado a densidade e a biomassa seca das plantas daninhas.

Corn growth and yield in competition with weeds

Although labor is intensive, evaluating the growth of crops may allow a better understanding of crop performance, including the reasons why certain cultivars can compete better with weeds. This study aims at evaluating growth, green ear yield, and grain yield in corn when in competition with weeds. Cultivars AG 1051 and BRS 106 were grown with (two hoeings, at 20 and 40 days after sowing) or without weed control. In order to evaluate crop growth, six collections of the above-ground part and the root system of corn were performed, every 15 days, with the first collection made 30 days after sowing. A randomized complete block design was adopted, with split-split plots (weed control in plots, cultivars in subplots, and collections in sub-subplots) and ten replicates. Eighteen weed species were found in the experiment area. Increased values of corn leaf area, above-ground part and root system, due to plant age function, were smaller in non-hoed plots than in hoed plots and were dependent upon cultivar. The lack of weed control increased dry matter of weeds aboveground part and decreased green ear yield and grain yield. Cultivar AG 1051 had higher increases in leaf area, above-ground part of the plant and root system, due to plant age function, and controlled weeds better than cultivar BRS 106. In addition, cultivar AG 1051 was superior to other cultivars with respect to most traits used for green corn yield and grain yield assessment.

Milho verde e feijão-caupi cultivados em consórcio sob diferentes lâminas de irrigação e doses de fósforo

O objetivo deste trabalho foi avaliar a resposta de milho verde (Zea mays) e de feijão-caupi (Vigna unguiculata), cultivados em consórcio, a lâminas de irrigação e doses de fósforo. Os experimentos foram realizados em 2008 e 2009, em delineamento de blocos ao acaso, com 25 tratamentos e quatro repetições. Os tratamentos consistiram de cinco lâminas de irrigação, a 70, 110, 140, 180 e 220% da evapotranspiração da cultura, e de cinco doses de P2O5 a 0, 50, 100, 150 e 200% da dose de P recomendada. O milho foi semeado no espaçamento 0,80x0,40 m, e o feijão-caupi foi semeado dentro das linhas entre as plantas de milho. Não houve efeito das doses de P2O5; porém, a resposta às lâminas de irrigação foi quadrática em milho e linear em feijão-caupi. As máximas produtividades técnicas de espigas de milho verde com palha (10,76 Mg ha-1) e sem palha (7,62 Mg ha-1) foram obtidas com a lâmina de 530 mm, intermediária às lâminas referentes a 180 e 220% da evapotranspiração da cultura. A maior produtividade de grãos verdes de feijão-caupi (3,40 Mg ha-1) foi obtida com a maior lâmina de água aplicada, de 644 mm.