Soil resource characterization of Dhamni micro-watershed in Chandrapur district of Maharashtra was carried out using IRS-1D LISS-III data in conjunction with field survey and ancillary data. The study indicates that nearly 84.2 per cent of the total geographical area of the watershed is under cultivation. Forest (mainly degraded) occupy only 4.5 per cent area Whereas wasteland with scrub cover 9.4 per cent area of the watershed. Nine soil series were tentatively identified and mapped as soil series association in to five mapping units. These soils belong to order Inceptisol, Vertisol and Mollisol. Except the soils of wasteland with scrub, other soils are moderately suitable for pigeonpea and soybean and have average to good productivity.
A long-term field experiment was started during rabi 1988-89 in calcareous soil at RAU, Pusa Farm in split plot design with NPK levels in main plots and organic sources in sub-plots. Rice and wheat as 35 th and 36 th crop were grown for present investigation. Post-harvest soil samples were analysed for bacterial, fungal and actinomycetes population. Result of study revealed a considerable increase in the population of bacteria, fungi and actinomycetes with continuous application of chemical fertilizers and organic manure alone or in combination. Bacterial population increased to a tune of 8.73, 24.60 and 28.82 per cent over control (31.50 x 10 6 cfu g -1
The effects of N-fertilization on the nutritional quality of short-straw wheat variety, Yecora Rojo, was studied under sprinkler irrigation system, The fertilizers applied were the conventional N-fertilizer, urea (U) applied as single dose or in three split applications (U-S), and the slow release N-fertilizers, ureaform (UF) (38% N and 20 N), osmocote (OC) with 9 or 14 months longevity and sulphur-coated urea (SCU) with either 17% or 37% dissolution rates in 7 days. These fertilizers were applied at 0 (control), 75, t25, and 175kg/ha during the 1982-1983 season. Results indicated that at 75 kg/ha there was no significant change in the protein content. At 125kg/ha, the protein content increased (P < 0.05) with urea (applied in three split applications) and OC. At 175 kg/ha, all the fertilizers increased the protein content with the exception of urea (applied as single dose) and UF. Ash content tended to decrease with increasing levels of N, while fat and crude fiber were unaffected. All the fertilizers increased the protein yield (kg/ha), the maximum increase occurring with the slow-release N fertilizers, OC and SCU. Except UF, aI1 the fertilizers decreased the lysine content significantly (P < 0.05) in the protein moeity at 175 kg/ha level but lysine percentage in the grain was not reduced. The yield (kg/ha) of individual amino acids including lysine was increased several times at the 175 kg/ha level. P content tended to decrease while Fe and Zn increased with fertilization. Slow-release N-fertilizers, OC and SCU as well as urea (in 3 split applications) appear to have a significant positive effect on the nutritional quality of the grains of wheat variety, Yecora Rojo.
The rice-growing river floodplain ecosystems of Majuli island, India, have been recognized as a biodiversity hotspot with a high degree of variability in geomorphological forms and geochemical conditions for trace metals in hydric soils. Ten hydric soil series in rice-growing soils of Majuli island were studied with the aim of understanding the pedogenic influence on distribution and content of total and diethylenetriamine penta acetic acid (DTPA) extractable micronutrient cations (Fe, Mn, Cu and Zn) and their enrichment levels. The correlation analysis showed that these cations were closely linked with soil texture, organic carbon, cation exchange capacity and pH levels. The multiple regressions and cluster analysis was employed to identify the effect of river fed deposits on distribution pattern and lithological enrichment of metals. The contamination status was assessed through quantitative indexes with reference material. The negative geo-accumulation index values were used to conclude that these soils had been practically unchanged by anthropogenic influences. They showed moderate Cu contamination but were otherwise unpolluted (Pollution load index < 1) with respect to total elements under study.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.