Yield Variables Research Articles

Application Of Legowo Range To The Growth and Result Of Three Sorgum Varieties (Sorghum Bicolor L. Moench)

Sorghum (Sorghum bicolor L. Moench) is a type of cereal plant that has considerable potential to be developed in Indonesia. Sorghum seeds contain 73% carbohydrates, 3.5% fat, and 10% protein depending on the variety and planted area. Sorghum is resistant to drought and relatively resistant to pests and diseases. This research was conducted with the aim of knowing the interaction between the jajar legowo planting system and three varieties of sorghum. This research was conducted at the Seed Center of the Agriculture Service, Kebomas District, Gresik Regency. The main ingredients of this experiment were sorghum seeds of the Numbu variety obtained from the Faculty of Agriculture, University of Muhammadiyah Gresik, the Bioguma 3 Agritan variety and the KD-4 variety obtained from the Tripe Agricultural Extension Center and Phonska NPK fertilizer. This study used a factorial randomized block design (RAKF) with two factors, namely jajar legowo and varieties. The two factors were combined to obtain 9 treatments. The observed variables consisted of germination rate, plant height, stem diameter, number of leaves, flowering age, harvest age, panicle length, wet weight of planted seeds, dry weight of planted seeds and estimated dry weight of seeds per hectare. The treatment that showed a significant effect was then tested further with Duncan's multiple range test at the 5% test level. The results showed that there was no significant interaction between the jajar legowo planting system and varieties on the variables of plant growth and yield.

ANALISIS FAKTOR-FAKTOR YANG MEMPENGARUHI RETURN SAHAM DENGAN NILAI PERUSAHAAN SEBAGAI VARIABEL MODERASI PADA PERUSAHAAN BATUBARA YANG TERDAFTAR DI BURSA EFEK INDONESIA

This research aims to analyze the effect of economic value added, inflation, net profit margin, and dividend yield on stock returns with company value as a moderating variable either partially or simultaneously. The research scope is coal sub-sector companies that is listed on the Indonesia stock exchange (BEI) for the period 2015-2021, using purposive sampling technique, 6 companies were obtained as research samples. The analysis technique that is used are multiple linear regression analysis and moderate regression analysis. The results are partially only the Net profit margin variable that has significant effect on stock returns, while the Economic value added, inflation, and dividend yield variables have no effect on stock returns. In addition, firm value as a moderating variable proved unable to strengthen or weaken the relationship between Economic value added, Inflation, Net profit margin, and Dividend yield on stock returns. Simultaneously, all variables have no effect on Stock Return.

PENGARUH INTERAKSI ANTARA PEMBERIAN BIOFOSFAT DENGAN PENGGUNAAN KULTIVATOR LOKAL UBI JALAR TERHADAP PERTUMBUHAN HASIL DAN KANDUNGAN GULA TANAMAN UBI JALAR

This study aims to examine the effect of the interaction between the administration of biophosphate and the use of local Jakar potato cultivars on the growth, yield and sugar content of sweet potato plants. The research method uses (RAK) 4 times. The 1st factor was Biophosphate (B), consisting of two levels: b1 (100 kg/ha biophosphate) and b2 (200 kg/ha biophosphate). The second factor was Sweet Potato Cultivar (K), consisting of three levels: k1 (cilembu), k2 (maja) and k3 (brass and white). Differences in treatment means were tested using Duncan's multiple range test at the 5% level. The results showed that bophosphate and sweet potato cultivars had no interaction effect. Phosphate administration did not have a different effect on all growth and yield variables of sweet potato plants. The use of cultivars had no different effect on growth, yield and sugar content.

ELEVATION OF WHEAT CULTIVARS AT VARIOUS LEVELS OF NITROGEN THROUGH FIELD EXPERIMENTATION AND MODELING APPROACH IN PUNJAB, PAKISTAN


 
 
 The present study was conducted to evaluate the growth of wheat cultivars at different nitrogen (N) levels through experimental and crop simulation model in Sialkot District of Punjab, Pakistan. The data was collected from the fields as well as the weather and soil data obtained from the relevant departments. The experiment was conducted for two wheat cultivars with four treatments of N i.e. 0, 55, 110, 220 kg N per hector. Overall, the results indicated that the field level observed data showed significantly positive correlation with the model simulated growth and yield variables. The findings of this study showed that out of the two wheat cultivars i.e. Faisalabad-2008 showed earlier anthesis and maturity as compared to the Sehar-2006, however, the wheat yield, leaf area index, and harvest index was higher for Sehar-2006. From these results, it can be concluded that Sehar-2006 has more productivity and must be encouraged as compared to Faisalabad-2008.
 
 

PREDICTION OF CORN GRAIN PRODUCTIVITY AS A FUNCTION OF ALTITUDE AND PLANT POPULATION

This study aimed to evidence the best arrangement of plants according to altitudes to potentialize corn grain yield. An information survey was performed in the 2019/20 harvest, using 144 producers responsible for corn grain production fields totaling 2,301.3 hectares in 144 environments of Rio Grande do Sul. Within 144 environments, 14 corn hybrids were arranged: DKB 240 PRO, DOW 2A620, AG 9045 PRO3, AS1555 PRO3, AS1572 PRO2, AS1656, BIOGENE 7046, DKB 250 PRO2, DKB 290 PRO3, DKB 330RR, NS56, P1630HX, P30F53HX, and SH7910. Yield, morphological, and phenological variables were measured, and geographic and meteorological information was collected. There is a positive influence on grain yield according to altitude and plant population characteristics. At lower altitudes, increasing plant population is essential to enhance grain yield.

Métodos de inoculación de cepas nativas de Trichoderma sp. y su efecto sobre el crecimiento y rendimiento de la quinua

The use of endophytic fungi is an effective alternative to control pathogens, improve plant metabolism and yield in crops. The objective of this study was to assess the effect of five different strains of Trichoderma sp. on the growth and yield of quinoa plants (Chenopodium quinoa Willd) by using two methods of inoculation: a) pelleted seed, and b) drenching with the endophytic fungi. A completely randomized design with a 2 x 5 factorial arrangement, plus a control with five repetitions was used. The 11 treatments were evaluated with five repetitions. Yield, and aerial and root growth variables were determined. There were no interactions between strains and inoculation methods for aerial plant growth, but there were for root growth and yield. The seed pelleting method produced a higher aerial growth compared to the drench method. In root length, the greatest values were found with the TE-7 and TE-126 strains combined with the pelleted seed method. Likewise, the TE-126 strain induced the greatest dry biomass of roots using the same method. The yield varied between 4147.6 and 3222.7 kg.ha-1 in most of the strain-method combinations, without significant differences between them. Statistically, the control always ranked last, indicating the importance of the seed inoculation. Trichoderma sp. produced increases in vegetative growth and quinoa yield, with TE-7 and TE-126 being the best strains. Furthermore, seed pelleting promoted vegetative growth of the plants, while grain yield was not affected by the inoculation method.

Comparing the yield and nutritional value of ensiled amaranth (Amaranthus hypochondriacus) cultivars with corn silage (Zea mays) in doublecropping condition.

Yield, chemical composition, and fermentation variables were compared for amaranth silages (AMS) from five cultivars (A5, A12, A14, A28, and Maria) and corn (Zea mays; CS). In vitro methane production, organic matter disappearance, microbial protein, ammonia-N concentration, volatile fatty acid levels, cellulolytic bacteria and protozoa populations, and in situ dry matter (DM) and crude protein (CP) degradability were evaluated. All crops were harvested when the plant was at the mid-milk line stage, then chopped, placed in sealed 5 L plastic bags and stored for 60 days. Data analysis was carried out using the PROC MIXED method of SAS with a randomized complete block design. The mean DM forage yield of CS was higher than the average DM yield of the amaranth cultivars (P < 0.001). In comparison with CS, the AMS had higher CP, lignin, ether extract, ash, calcium, phosphorus, magnesium, total phenolics and metabolizable protein (P < 0.001), but had lower DM, neutral detergent fiber, non-fiber carbohydrates, organic matter disappearance, lactic acid (P < 0.01) and in vitro methane production (P = 0.001). The AMS had higher (P < 0.01) pH, ammonia-N concentration, in vitro microbial protein, in situ digestible undegradable protein, and metabolizable protein compared to CS. Overall, in comparison to CS, the amaranths produced a silage of medium-quality.

Additive intercropping with peanut increases growth and yield of various promising lines of red rice under aerobic irrigation system on permanent raised-beds

Cereal-legume intercropping can potentially increase yield of the intercropped cereals such as maize and rice. The aim of this research was to examine whether relay-planting peanut between rows of several promising lines of red rice could increase growth and yield of irrigated aerobic red rice. The Split Plot design was used to arrange the experiment consisting of three blocks and two treatment factors. The main plot factor was red rice line comprising four genotypes (G04, G10, G15 and G21) while the subplot factor was intercropping comprising two treatments (T0= monocropped rice, T1= rice-peanut intercropping). The results indicated that the rice-peanut intercropping could significantly increase red rice growth and yield while different lines only affected plant height and some yield variables. However, plant height and grain yield showed significant interactions of the treatment factors, in which G21 intercropped with peanut had the highest yield (47.16 g/clump equivalent to 9.34 tons/ha), while the lowest yield was on monocropped G04 (21.55 g/clump equivalent to 4.31 tons/ha). These indicated different responses among the red rice lines to additive intercropping with peanut, in which G21 showed the highest yield increase, followed by G15 and G04, while G10 showed no significant yield increase due to intercropping.

Increasing levels of calcium salts of palm fatty acids affect production responses during the immediate postpartum and carryover periods in dairy cows.

Our objective was to determine the dose-response effects of calcium salts of palm fatty acids (CSPF) on nutrient digestibility and production responses of early-lactation dairy cows grazing on tropical pastures and to evaluate carryover effects throughout mid and late lactation. Forty multiparous dairy cows (Jersey × Holstein) with (mean ± standard error of the mean) 20 ± 1.69 kg of milk/d and 20 ± 5.0 d in milk were used in a randomized complete block design. During the treatment period, all cows were kept in a grazing system. The treatments were offered for 90 d (treatment period) and consisted of 4 increasing levels of CSPF: 0 (0 kg/d), 0.2 (0.2 kg/d), 0.4 (0.4 kg/d), and 0.6 (0.6 kg/d). Each treatment had 10 animals. Increasing CSPF from 0 to 0.6 kg/d replaced an equivalent amount of a corn-based concentrate supplement offered at 10 kg/d on an as-fed basis (8.96 kg/d as a dry matter basis). All cows were housed and received a diet without fat inclusion fed as total mixed ration once a day from 91 to 258 d of the experiment (carryover period). During the treatment period, increasing CSPF linearly decreased dry matter intake (1.20 kg/d), linearly increased neutral detergent fiber digestibility (3.90 percentage units), and quadratically increased total fat digestibility (6.30 percentage units at 0.4 kg/d CSPF). Increasing CSPF linearly increased the yields of milk (4.10 kg/d), milk fat (0.11 kg/d), milk lactose (0.19 kg/d), energy-corrected milk (ECM; 3.30 kg/d), and feed efficiency (ECM/dry matter intake, 0.34 kg/kg), and linearly decreased milk protein content (0.38 g/100 g), body weight change (0.05 kg/d), and body condition score (0.37). We observed interactions between CSPF and time during the carryover period. Overall, CSPF supplementation linearly increased or tended to increase milk yield until 202 d of the experiment with a similar pattern observed for all the other yield variables. In conclusion, supplementing CSPF from 0 to 0.6 kg/d during 90 d increased neutral detergent fiber and total fat digestibility and the yields of milk, milk fat, and ECM in early-lactation dairy cows grazing on tropical pastures. Most production measurements linearly increased during the treatment period, indicating that 0.6 kg/d CSPF was the best dose. Also, supplementing CSPF from 0 to 0.6 kg/d for 90 d during early lactation had positive carryover effects across mid and late lactation.

Nitrogen fertilization levels and timing affect the plasticity of yield components in bread wheat (Triticum aestivum L.)

The plasticity of grain yield components typically follows a hierarchy, with early-forming components having greater plasticity than late components (tiller number > spike number > grain number > grain weight). The first aim of this study was to assess the plasticity of two previously unexplored yield sub-components in wheat, i.e. spikelets per spike and grains per spikelet, and of other yield-related variables, i.e. straw mass, plant height, ovary mass and harvest index. The second aim was to test the potential limits of the phenotypic plasticity of yield components, and the relationships between them, by applying sudden strong changes in resource availability (via nitrogen fertilization)at different times during the crop cycle. Nitrogen (N) fertilization was applied only early (60 kg ha-1 of N, early tillering) or only late (120 kg ha-1, early stem elongation), very late (120 kg ha-1, late stem elongation) or extremely late (120 kg ha-1, pollination), never (N0) or multiple times (total of 300 kg ha-1) during the growth cycle of both a small-fruited (Bologna) and a large-fruited (Bora) bread wheat (Triticum aestivum L.) cultivar. Yield and grain number increased with fertilization levels in both cultivars, with the 300 kg N ha-1 treatment having the highest yield. Grain weight also increased with fertilization levels, but only when considering different N levels applied early.Delaying fertilization reduced yield, but increased grain weight, creating a tradeoff between yield (and grain number) and grain weight. Similarly, the relationships between other yield components and variables varied when considering N timing or levels. The plasticity of yield components, expressed as total variation of the trait over the trait value for the N0 (i.e. control) treatment, was 26.5%, 30.5%, 61%, 75% and 22%, respectively for tiller number, spike number, spikelets/spike, grains/spikelet and grain weight. The plasticity of grains/spike, grain number, yield, straw biomass, plant height, ovary mass and harvest index, was 174%, 236% and 268%, 417%, 54%, 54% and 36.5%, respectively. The results show that the plasticity of yield components (and other variables) may differ with different sources of environmental variation, explaining why, in the literature, two traits may be found to correlate both positively, negatively (tradeoff) or not at all. These results further our knowledge on the plasticity of, and the relationships among, yield components, and may be useful for further improvements of yield with agronomic intervention or breeding.

PENGARUH DOSIS PUPUK BOKASI KOTORAN SAPI TERHADAP PERTUMBUHAN DAN HASIL TANAMAN KACANG TANAH (Arachis hypogaea L.) LOKAL MUNA PADA LAHAN MARGINAL

The aim of this research was to study the effect of cow manure bokashi fertilizer on the growth and yield of local Muna peanuts on marginal land. The research was conducted in the Experimental Garden Field II, Faculty of Agriculture, Halu Oleo University, Kendari, from April to June 2021. The study used a randomized block design (RBD) consisting of controls without applying bokashi fertilizer, 5 t ha-1 bokashi fertilizer, 10 t ha-1 bokashi fertilizer, bokashi fertilizer 15 t ha-1, bokashi fertilizer 20 t ha-1. Each treatment was repeated 3 times so that there were 15 experimental units. The variables observed were plant height, stem diameter, number of leaves, leaf area, number of pods, pod weight, seed weight, number of nodules and production. The results showed that the application of cow dung bokashi fertilizer doses on the growth and yield of muna local peanut plants on marginal land had a significant effect on the growth and yield variables of peanut plants. The best treatment was obtained at a dose of 20 t ha-1 bokashi fertilizer compared to other treatments and controls.

Growth, yield, and yield variables of onion (Allium Cepa L.) varieties as influenced by plantspacing at DambiDollo, Western Ethiopia

Onion (Allium cepa L.) is an important bulb plant grown worldwide. Proper use of the agronomic practice has undoubtedly contributed to growing crop yields. The right level of any farming practice, like the distance between plants, plant density, date of planting, and time of harvest, can produce the wanted outcomes. Therefore, this research was piloted to evaluate the influence of plant spacing on the development of bulb harvest-related traits of onion varieties in Dambi Dollo University, Western Ethiopia, in 2021. Three onion varieties (Adama red, Monarch, Nafis) and four intra-row spaces (6 cm, 8 cm, 10 cm, and 12 cm) in factorial combinations were settled by a complete randomized block design which was simulated three times. The findings of the study indicate that all the factors related to crop growth and bulb yield of onion varieties were mainly influenced by different kinds and plant spacing. Conversely, the collaboration of these two factors did not affect all other factors, but the interaction of the two factors had a great effect on the days to maturity measured in this study. The highest plant height was registered on the onion planted at a distance of 10 cm (59.83 cm) and 12 cm (59.08 cm) distance between plants. The high commercial yields (34.44 t ha−1) and entire bulb yield (35.40 t ha−1) were found in the Nafis variety. The highest marketable yields (31.12 ha−1) and entire marketable yield (31.78 ha−1) were recorded on an onion plant planted 10 cm between plants. Therefore, in the research area, farmers can use a variety of Nafis and a 10 cm distance between plants to increase their onion production.

CORRELATION ANALYSIS AND CROSS-PRINT BETWEEN THE SEVERAL CHARACTERS OF LOCAL GOGO RICE CULTIVARS (Oryza sativa L.)

The relationship between several characters of yields is very important for developing effective selection criteria. The total correlation between the result character and the result component may be misleading as a result of its relationship with other characters. Separating the total correlation into direct and indirect effects provides a more significant explanation of the cause of the relationship between dependent variables such as yield and independent variables such as yield components. This study aims to determine several traits that can be used to make selections indirectly and directly to increase the yield of upland rice. This research has been carried out on agricultural land in the village of Tamarenja (Kalama), Sindue District, Donggala Regency. Starting from August to December 2019, using a Randomized Block Design (RBD) with seven genotypic cultivars and three groups of cultivars so that there were twenty one experimental plots. The results showed that the number of leaves, leaf length, number of tillers, number of productive tillers, flowering age, thickness of seeds and weight of 1000 grains had a positive and significant correlation to yield. Flowering age, 1000 grain weight, and number of tillers are some of the characteristics that have a high direct effect and significant correlation to upland rice yield.

PRODUCTIVITY Panicum maximum cv. Trichoglume WITH DIFFERENT TYPES AND DOSAGE OF ORGANIC FERTILIZER

&#x0D; &#x0D; &#x0D; This study aims to determine the productivity of Panicum maximum cv. Trichoglume with different types and dosage of organic fertilizer. The trial was for 2 months, with factorial completely randomized design (CRD). The first factor were type of organic fertilizer: S (cow manure); K (goat manure); and SK (cow and goat manure), and second factor was dosage of organic fertilizer: D0 (0 ton ha-1); D1 (10 tons ha-1); D2 (20 tons ha-1); and D3 (30 tons ha-1). There were 12 treatment combinations and each treatment was repeated 4 times. The observed variables : growth variables, yield variables and growth characteristics variables. The results showed that there was no inter- action between the type and dosage of organic fertilizer in increasing the productivity of Panicum maximum cv. Trichoglume. The use of cow and goat manure (SK) can increase the number of leaves, number of branches, plant height, leaf dry weight, stem dry weight, total dry weight of forage, leaf area per pot, ratio of leaf dry weight to stem and weight ratio completely dry forage with roots. Dosage of organic fertilizer from 10-30 tons ha-1 can increase the productivity of Panicum maximum cv. Trichoglume on the variable number of tillers, number of leaves, number of branches, dry weight of leaves, dry weight of stems, total dry weight of forage, leaf area per pot, ratio of dry weight of leaves to stem and ratio of total dry weight of forage to roots, and the best results in dosage of 30 tons ha-1. It was concluded to increase the productivity of Panicum maximum cv. Trichoglume with cow and goat manure fertiliza- tion at dosage 30 tons ha-1.&#x0D; &#x0D; &#x0D;

Using Response Surface Methodology to Optimize Biodiesel Production from Sweet Almond (Prunusamygdalus Dulcis) and Jatropha (Jatropha Curcas) Seed Oils

The depletion of natural resources and the negative impact of oil on the environment have sparked interest in biodiesel as an alternative source of energy. Indigenous vegetable oils have the potential to be used as biodiesel feedstocks. Transesterification of vegetable oils produces biodiesel, which is regulated by numerous inputs factors, such as catalyst dosage, temperature, speed, and time while the density and specific gravity are outputs. Sweet almond (prunusamygdalus dulcis) and jatropha (jatropha curcas) seed oils were used to optimize conditions for the transesterification processes using the response surface methodology (RSM). The experimental matrix at different sodium hydroxide doses (0.3 – 1.5 wt %), intensity (500 – 1000 rpm), and time (20 – 60 min) in the presence of fixed molar ratio, and temperature were designed to optimize the biodiesel output variables (yield, specific gravity, and density).The analysis of variance (ANOVA) showed results for refined sweet almond biodiesel (RSAB) at catalyst (0.554 wt %), speed (750 rpm), time (40 min), giving the optimization solution with the specific gravity (0.995 g/cm3), density (1.230 g/cm3) with the yield of 83.304% for RSAB. Whereas the RJB had the optimum catalyst of (0.3 wt %,), speed (500 rpm), time (44.1 min), with the specific gravity (0.964 g/cm3), density (0.884 g/cm3), and the biodiesel yield of 96.4%. The estimated biodiesel yields vary by 13.096% under these reaction conditions. According to ANOVA statistics, the catalyst dose has a substantial effect on biodiesel yields, and these biodiesels could be employed as an environmentally friendly alternative to diesel.

The contribution of perennial ryegrass (Lolium perenne L.) breeding to whole pasture productivity under dairy cattle grazing in New Zealand. 1. Variation in yield, nutritive value and persistence‐related traits

AbstractPerennial ryegrass (PRG, Lolium perenne L.) breeding effort in New Zealand (NZ) has increased since c. 1990, resulting in greater functional trait diversity (e.g. heading date, ploidy, and associated Epichloë endophyte strain) in commercial products. This study quantified the variation, associations and interactions in dry matter (DM) yield, nutritive value and persistence‐related traits among commercial cultivar‐endophyte combinations released between 1973 and 2012, as a basis for assessing gains in value being delivered to the pasture‐based livestock industries. Twenty‐four or 28 combinations were compared over 3 years in two trials in each of two regions: Waikato in northern NZ (dryland), and Canterbury in central eastern South Island (irrigated). Cultivar‐endophyte combinations were sown in mixtures with white clover, and pastures were intensively grazed 8–11 times per year by dairy cows. Principal Component Analysis identified 4 distinct clusters for the DM yield variables and for metabolisable energy (ME) content in each of the four trials. A broadly‐adapted group of three late‐season flowering, AR37‐infected diploids with NZ and Spanish breeding backgrounds dominated the highest‐yielding clusters. Tetraploids dominated the high ME content clusters. Interactions with region were observed throughout the data set: the strongest of these was driven by endophyte strain effects in Waikato. High‐yielding cultivar‐endophyte combinations in these trials were also generally high‐yielding in the standard cultivar merit testing system operated in New Zealand, as interpreted via the DairyNZ Forage Value Index. However, alignment was poorer for medium‐ and lower‐yielding cultivar‐endophyte combinations. Several implications for forage evaluation methods and end‐user industries are identified.

APLIKASI PUPUK ORGANIK CAIR URINE KAMBING TERHADAP PERTUMBUHAN DAN HASIL MENTIMUN

Liquid organic fertilizer from goat urine is a fertilizer that dissolves easily in the soil and carries important elements for soil fertility. Fertilizers an important role in increasing crop yields, especially in soils with low nutrient content. The aim of the study was to obtain the optimum dose of goat urine liquid organic fertilizer for cucumber growth and to obtain the optimum dose of goat urine liquid organic fertilizer for cucumber yield. This study used a completely randomized design method and the treatment was goat urine liquid organic fertilizer (POC) consisting of 5 treatments, namely 0 ml/liter water, 50 ml/liter water, 100 ml/liter water, 150 ml/liter water, and 200 ml/liter of water. The administration of goat urine liquid organic fertilizer at a concentration of 200 ml/liter of water affected the cucumber growth variables, namely plant height, number of leaves, flowering age, and harvest age. Administration of goat urine liquid organic fertilizer at a concentration of 200 ml/liter of water affected the yield variables of cucumbers, namely number of fruit, fruit weight per fruit, fruit diameter, and fruit length.

Stepwise Regression Models-Based Prediction for Leaf Rust Severity and Yield Loss in Wheat

Leaf rust is a devastating disease in wheat crop. The disease forecasting models can facilitate the economic and effective use of fungicides and assist in limiting crop yield losses. In this study, six wheat cultivars were screened against leaf rust at two locations, during three consecutive growing seasons. Subsequently, the stepwise regression analysis was employed to analyze the correlation of six epidemiological variables (minimum temperature, maximum temperature, minimum relative humidity, maximum relative humidity, rainfall and wind speed) with disease severity and yield loss (%). Disease predictive models were developed for each cultivar for final leaf rust severity and yield loss prediction. Principally, all epidemiological variables indicated a positive association with leaf rust severity and yield loss (%) except minimum relative humidity. The effectiveness of disease predictive models was estimated using coefficient of determination (R2) values for all models. Then, these predictive models were validated to forecast disease severity and yield loss at another location in Faisalabad. The R2 values of all disease predictive models for each of the tested cultivars were high, evincing that our regression models could be effectively employed to predict leaf rust disease severity and anticipated yield loss. The validation results explained 99% variability, suggesting a highly accurate prediction of the two variables (leaf rust severity and yield loss). The models developed in this research can be used by wheat farmers to forecast disease epidemics and to make disease management decisions accordingly.

Effects of Poultry Manure, Urban Waste Compost and NPK-20-10-10 on the Growth, Yield and Shelf-Life of Two Varieties of Cucumber (Cucumis sativus L.) in the Western Highlands of Cameroon

Organic and inorganic farm inputs in the form of fertilizers is a management practice to improve soil fertility for the growth and development of cultivated crops. A field experiment was conducted to evaluate the growth, yield and shelf-life response of cucumber (Classico F1 and Poinsett-76) to fertilizer applications. The experimental design was a randomized complete block in split plots with three repetitions of the treatments; Control (To: No fertilizer application), poultry manure (T1:20t ha-1), urban waste compost (T2:20t ha-1), NPK-20-10-10 (T3:0.7t ha-1), poultry manure (10t ha-1)+NPK-20-10-10 (0.35t ha-1) (T4), poultry manure (10t ha-1)+urban waste compost (10t ha-1) (T5), urban waste compost (10t ha-1)+NPK-20-10-10 (0.35t ha-1) (T6). Collected data on growth and yield variables from emergence till harvest were analyzed for variation in R version 4.0.1. Results showed that variety and fertilizer had a significant effect (P &lt; 0.05) on all growth variables with Classico F1 variety recording the highest mean values for all growth and yield variables. T1 recorded the highest in all growth variables (vine length, No. of leaves and stem diameter), except for the leaf area in T5 of Classico F1 (404.20 cm2) with the lowest in T0 of Poinsett-76 (87.87cm2). Variety, fertilizer treatments and interactions showed significant effects (P &lt; 0.05) on yield variables. Classico F1 was superior to Poinsett-76, yielding 31.91tha-1 in T1 while Poinsett-76 produced 20.36tha-1 in the same treatment. The lowest yield was recorded in the control treatments (4.45 tha-1 for Poinsett-76 and 7.55 tha-1 for Classico F1). Shelf-life evaluation showed the highest weight loss (20%) in fruits obtained in NPK-20-10-10 treatments within 21 days of storage. These results revealed that the integration of poultry manure or urban waste compost and chemical fertilizer (NPK-20-10-10) improves the growth and yield of cucumber as well as the shelf-life of harvested fruits in the western highlands of Cameroon.

Assessing Genetic Parameter, Correlation and Path Coefficient in Spontaneous Mutant Progenies of Lentil (Lens culinaris Medikus ssp. culinaris) Variety DPL 62

Background: Lentil is one of the most significant pulse crops, frequently referred to as “poor man’s meat” because of its high protein content and inexpensive price. The present study was assessed for eleven morphological and yield variables to determine genetic variability, correlation and path co-efficients. Methods: The experiment was conducted in a Randomized Complete Block Design using 56 different homogeneous progenies of a spontaneous mutant of lentil variety DPL 62 and four control varieties in triple replica during rabi 2017-18. Result: Significant amount of variability was observed for all the traits. High phenotypic coefficients of variance and genotypic coefficients of variance coupled with high heritability and genetic advance were observed for peduncle length, number of pods per plant, seed width, seed yield per plant suggesting that these traits are genetically controlled by additive gene action. Seed yield per plant exhibited significant positive association with number of branches/plant and number of pods/plant while number of pods/plant revealed highest positive direct effect on seed yield per plant followed by 100-seed weight, number of branches per plant, days to maturity and leaflet breadth. Therefore, selection for these characters will directly lead to improvement in the yielding ability of lentil genotypes.