Aims: The objective of this work was to evaluate the distribution of nutrients in the layers of a Cerrado oxisol, fertilised with liquid swine manure compared to the values of these nutrients established by the Conama (National Council of the Environment) for the conservation of quality from soil.
Study Design: The experiment was carried out in a randomized block design with four treatments, in five replications, 0, 10, 20 and 30 m3 swine net waste ha-1, applied eight times, corresponding to the accumulated volumes of 0, 80, 160 and 240 m3 swine net waste ha-1, respectively.
Place and Duration of Study: The study was conducted at the Rio Verde Foundation (13º03 '01 "S and 55º54' 40" W), from February 2014 to January 2015.
Methodology: The experiment was composed of 20 experimental units with dimensions of 11.0 m in length and 3.5 m in width. This swine liquid manure (DLS) waste was previously arranged in a stabilisation pond to conform to the microbiological standards of organic waste required by Conama. Soil samples were collected with depths in each plot to evaluate the nutrient contents.
Results: The net residue of swine manure influenced the total nitrogen contents in the layer of 0.10 to 0.20 and Fe in the layer of 0.20 to 0.40 m. From the environmental point of view, total nitrogen (NT), phosphorus (P), copper (Cu) and zinc (Zn) contents were below the values established by Brazilian environmental legislation for soil quality conservation.
Conclusion: In general, nutrient content in the profile of the Cerrado oxisol was not affected by the successive applications of swine net waste in the three soil layers, in the sense that there is an immediate concern that the content is above the critical environmental limit established by Conama.
Water scarcity is a venomous upshot of climate change and is one of the sternest factors restraining global crop productivity. In order to study association and cause-effect of shortage in irrigation on some morphological and quality traits on yield, an experiment accommodating 20 genotypes of Indian mustard (Brassica juncea L. Czern & Coss), was conducted in Randomised Complete Block Design (RBCD) from various Rapeseed & Mustard centres located across country, randomly in three replications during Rabi2016-17, one condition subjected to drought (devoid of irrigation) inside the Rainout shelter under residual moisture condition and another situation with normal irrigated field condition at research farm of Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur. Genotypic correlations for grain yield and other characters were invariably higher than phenotypic correlations indicating indicated less influence of environment. Earliness in flowering (-0.010; -0.256) and maturity (-0.335; -0.185), Secondary branches per plant (0.267; 0.169), Siliqua on primary mother axis (0.162; 0.079), Length of primary axis (0.006; 0.275), Siliqua density (0.244; 0.189) and Biological yield (0.444*;0.411*) also had shown positive correlation with grain yield per plot at phenotypic level under both non- irrigated and irrigated condition indicated that improvement in these morphological parameters indicated genotypes with early flowering and maturity coupled with more secondary branches with more siliqua accommodated by longer primary mother axis with increasing density of siliqua along with high biological yield and will ultimately enhance the grain yield.
An experiment was conducted at the experimental station of Higher Institute of Agronomy, Chott Mariem, Sousse (Tunisia) to investigate the effect of similar levels of nitrogen and potassium on potato growth (Spunta variety). Four similar levels of nitrogen (N) and potassium (K) (0, 50, 80 and 120 kg ha-1) were randomized complete block design with four replications. Data collected on growth and yield parameters were analyzed using SPSS.20 computer software. Nitrogen (N) and potassium (K) levels showed significant effect on mostly growth and yield parameters. It can be show that N and K application at the level of 120 kg ha-1 significantly affected plant height (59.16 cm), number of leaves plant-1 (294), number of branches plant-1 (14.66), fruits plant-1 (20.96), and leaf area (422.66) index. Additionally the maximum of dry matter (13.83%), tuber size (79 mm), tuber yield (22.193) and tuber weight (203.66 g) were recorded with 120 kg ha-1. From this study, it can be concluded that the higher levels of nitrogen (N) and potassium (K) (120 kgha-1) can be used for optimum production of potato variety Spunta in the study area.
The study appraised the economic performance of battery cage and deep litter systems of poultry production. The study was carried out in Osun State, Nigeria. Six areas (Iwo, Ejigbo, Awo, Ede, Sekona and Osogbo) were purposively selected due to their high concentration of poultry farmers. From each of the selected areas, 10 battery cage and 10 deep litter poultry farmers were randomly selected giving a total of 120 farmers used for the study. The study showed that the net farm income was ₦1472899.358 and ₦320985.074 per annum for battery cage and deep litter system of production respectively. The total production cost for battery cage system was ₦141529.642 while that of deep litter system was ₦75616.626. Gross margins were ₦1494614.608 and ₦321095.974 for battery cage and deep litter system respectively. Costs of feed constituted the largest share of the total cost for the two system of production. Cost of feed, cost of drugs and cost of labor were the significant determinants of gross margin earned by poultry farmers in the study area.
Genotypic and phenotypic variances, genotypic coefficient of variation and phenotypic coefficient of variation, heritability and genetic advance were estimated for twelve agronomic characters in ten West African okra, Abelmoschus caillei. The genotypic coefficient of variation ranged from 0.47 days to 50/% flowering to 41.43 for number of fruits per branch. Heritability estimate ranged from 32.00 days to 50% flowering to 98.14 for seed yield. Genotypic Coefficient of Variation (GCV) and Phenotypic Coefficient of Variation (PCV) were estimated for edible pod length, dry fruit weight, number of seeds per pod, number of fruit per plant, number of pod per branch and seed yield per plant indicating a good genetic variability in these characters in West African okra. Thus direct selection for these traits would be highly effective in West African okra. The relatively high magnitude of heritability along with high genetic advance recorded for edible pod length, number of branches per plant, dry fruit weight, number of seeds per pod, number of fruits per branch, number of fruit per plant and seed yield per plant were indicative of likely effectiveness of selection for these characters.