Journal ArticleDOI
Statistical Methods For Agricultural Workers
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This article is published in Agronomy Journal.The article was published on 1956-07-01. It has received 2133 citations till now. The article focuses on the topics: Agriculture.read more
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Salinity induced oxidative stress and antioxidant system in salt-tolerant and salt-sensitive cultivars of rice Oryza sativa L
TL;DR: It is inferred that leaves of salt-tolerant cultivars tend to attain greater capacity to perform reactions of antioxidative pathway under saline conditions to combat salinity-induced oxidative stress.
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Microbial properties of soils as affected by cropping and nutrient management practices in several long-term manurial experiments in the semi-arid tropics of India
TL;DR: In this article, the effects of longterm cropping, fertilization, manuring and their integration on microbial community were studied in soil samples from five long-term fertilizer experiments under various rainfed production systems in the semi-arid tropics of India.
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Changes in carbon, nitrogen and phosphorus levels due to deforestation and cultivation: A case study in Simlipal National Park, India
TL;DR: In this article, the authors showed that deforestation and cultivation result in statistically significant reduction in organic C, total N and C:N ratios but no significant changes in total and available P levels; C:P and N:P ratios also reduced.
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Arsenic-tolerant, arsenite-oxidising bacterial strains in the contaminated soils of West Bengal, India
TL;DR: This study presents the first correlation regarding the presence of the aoxB gene and As(III) oxidation ability in Geobacillus stearothermophilus, and identifies four strains as superior As-oxidisers.
Genetic Variability Studies for Qualitative and Quantitative traits in Popular Rice (Oryza sativa L.) Hybrids of India
TL;DR: The characters viz., number of filled grains per panicle and water uptake exhibited high heritability coupled with high genetic advance indicating that simple selection could be effective for improving these characters.
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Dissertation
IDENTIFICATION OF YIELD LIMITING NUTRIENTS IN MAIZE (Zea mays L.,) THROUGH DRIS
Abstract: A crop nutrient survey was conducted in Karimnagar, Nizamabad and Warangal districts of Andhra Pradesh covering 30 mandals and 150 maize fields for developing the DRIS foliar diagnostic norms for N, P, K and Zn and to identify the yield limiting nutrients in maize. The population was divided into low (122 observations) and high yielding groups (28 observations) based on the third quartile method for developing the DRIS foliar diagnostic norms. A wide variation in soils and management practices were noticed in selected maize fields under study. Index leaf samples were collected from all the selected fields at tasseling/ silking stage and analyzed for N, P, K, Zn, Cu, Fe and Mn contents. A wide range of variation in chemical composition in index leaves was observed irrespective of yield level. Based on the Critical Nutrient Concentration (CNC), N, P, Zn and Cu contents in index leaf samples of Maize under study were deficient to an extent of 73, 12, 17 and 1 per cents respectively, and no deficiencies were observed with respect to K, Fe and Mn. The extent of nutrient deficiencies diagnosed by CNC method were changed depending up on the critical level adopted. Negative or low correlation coefficients were found between grain yield and nutrient concentration of Fe and Mn. However, grain yields were often correlated with N, P, K, Zn and Cu content in corn leaves. Based on the highest variance ratio between low and high yielding populations, forms of expression for different nutrients and their norms were selected. DRIS norms were established for various nutrient ratios obtained from high yielding population of maize crop and were further utilised to compute the DRIS indices, which assessed the yield limiting nutrients and their requirement in order of priority. The DRIS derived sufficiency ranges for N, P, K and Zn from nutrient survey of corn crop in three districts were 2.27 to 2.72, 0.23 to 0.39, 2.43 to 2.87 per cent and 26.6 to 66.2 mg kg, respectively. The number of nutrients diagnosed as yield limiting by DRIS is more than those identified by the CNC method. The extent of deficiencies observed by DRIS indices was also more when compared to that of the conventional Critical Nutrient Concentration (CNC) method in case of P, K and Zn but it was vice versa in case of N. The majority of the nutrients identified as deficient by CNC method also find place among the nutrients diagnosed as limiting by DRIS method indicating the adequacy of any nutrient is to be judged better in terms of its level in relation to the other nutrients, which is the basic philosophy of the DRIS method. The DRIS indices computed for the corn crop, identified not only the yield Name of the Author : Mr. CH. RAMULU Title of the thesis : IDENTIFICATION OF YIELD LIMITING NUTRIENTS IN MAIZE (Zea mays L.,) THROUGH DRIS Degree for which it is submitted : DOCTOR OF PHILOSOPHY Faculty : AGRICULTURE Department : SOIL SCIENCE AND AGRICULTURAL CHEMISTRY Chairperson : Dr. G. BHUPAL RAJ University ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY Year of Submission : 2011 limiting nutrients, but also prioritized the deficiencies, which varied from field to field. Nutrient diagnosis with DRIS indices was found to be more appropriate in identifying the yield limiting nutrients than the conventional critical nutrient concentration (CNC) method for getting the high yields of maize. Two experiments one with factorial nutrient combinations of N, P, K and Zn and another response study was conducted during Kharif 2010 to asses the effectiveness and validity of developed DRIS norms. The good yield response and shifting of priority of yield limiting nutrients were observed with the application of first two limiting nutrients in priority. Similarly, in factorial experiment, few selected treatmental combinations were studied to know the progressive diagnosis of nutrients which clearly indicated the effectiveness and validity of derived DRIS norms and indices in this study. Thus, DRIS indices were found to more appropriate and effective than conventional Critical Nutrient Concentration (CNC) in identifying the yield limiting nutrients in maize and there by getting increased yields with their rectification.
Journal ArticleDOI
Production potential and economics of safed musli (Chlorophytum borivilianum) under intercropping system
TL;DR: A field experiment was conducted for two years, 2004-5 and 2005-6 during July-March at the research farm of the Central Institute of Medicinal and Aromatic Plants, Lucknow to study the compatibility, productivity and economics of intercropping in safed musli as mentioned in this paper.
Journal ArticleDOI
Influence of Microbial Inoculants on Seedling Production in Teak (Tectona grandis L.f.)
C. Swaminathan,V. M. Srinivasan +1 more
TL;DR: It is concluded that inoculation of phosphobacteria and AMF conjointly be done for better survival and growth of teak seedlings.
Journal ArticleDOI
Effect of Integrated Nutrient Management on Growth, Yield And quality of Okra (Abelmoschus esculentus (L.) Moench)
TL;DR: The cultivated okra is an important fruit vegetable crop cultivated in tropical, subtropical and mild temperate parts of the world and belongs to the family Malvaceae in India.
Journal ArticleDOI
Influence of different dates of planting on growth, herb, oil yield and quality of essential oil of menthol mint (Mentha arvensis) in the North Indian Plain
TL;DR: A field experiment was conducted to study the effect of different dates of planting for three menthol mint cultivars (Saksham, Kushal and Kosi; developed by Central Institute of Medicinal and Aromatic Plants, Lucknow, India) on herb yield, oil yield and oil quality.
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