نتایج جستجو برای: soil deficiencies
تعداد نتایج: 202526 فیلتر نتایج به سال:
Data mining involves the systematic analysis of large data sets , and data mining in agricultural soil datasets is exciting and modern research area. The productive capacity of a soil depends on soil fertility. Achieving and maintaining appropriate levels of soil fertility, is of utmost importance if agricultural land is to remain capable of nourishing crop production. In this research, Steps f...
In acid soils, Al toxicity and nutrient deficiencies are main constraints for low yield of cacao (Theobroma cacao L.). A controlled growth chamber experiment was conducted to evaluate the effect of three Al saturations (0.2, 19, and 26%) adjusted by addition of dolomitic lime on growth and nutrient uptake parameters of cacao. Overall, increasing soil Al saturation decreased shoot and root dry w...
The soils in Pakistan across 22 Mha cultivated area are predominantly alluvial and loessal, alkaline in pH, calcareous and low in organic matter. These factors are mainly responsible for nutrient fixation in soil and low availability to plants. Zinc (Zn) deficiency in Pakistan was the first micronutrient disorder recognised in early 1970s as a cause of hadda disease in rice. After identificatio...
Deficiencies of essential vitamins, iron (Fe), and zinc (Zn) affect over one-half the world’s population. A significant progress has been made to control micronutrient deficiencies through supplementation, but new approaches are needed, especially reach rural poor. Agronomic biofortification pulses with Zn, Fe, boron (B) offers a pragmatic solution combat hidden hunger instead food fortificatio...
The main reasons for the fixation of some elements and consequently nutrient deficiencies, especially phosphorus, iron and zinc, are high levels of calcium (calcareous soils) and soil pH. Two sulfur fertilizers (sulfur alone and sulfur + organic material + Thiobacillus spp.) with two rates (2 and 4 kg sulfur/tree) were used to decrease soil pH and availability of P, Fe and Zn in apple trees dur...
Lack of accurate information about soil nutrient deficiencies coupled with limited access to appropriate fertilizers could lead mismatch between (requirements) and fertilizer applications. Such anomalies mismatches are likely have important implications for agricultural productivity. In this article we use experimental (spectral analysis) data from Ethiopia examine farmers’ response its yield r...
Soils of the cerrado biome, mostly oxisols and deep sandy entisols, are acid, dystrophic and poor in available nutrients. These soils are not very different from soils that occur in the Amazon region. However, the open savanna physiognomies of cerrado with lower biomass of their different components are deficient in nutrients at the ecosystem level, unlike the Amazon forests which retain high n...
S CIENTISTS face no greater problem than that of assuring that the earth's rising population be adequately clothed, housed, an'd fed. Such assurance is essential if permanent world peace is to be attained. Achievement of this objective demands effort on many fronts: improved agricultural science, chemurgy, greater utilization of photosynthetic energy, novel foods and construction materials, the...
Tropical regions have been considered the world's primary agricultural frontier; however, some physico-chemical deficiencies, such as low soil organic matter content, poor soil structure, high erodibility, soil acidity, and aluminum toxicity, have affected their productive capacity. Lime and gypsum are commonly used to improve soil chemical fertility, but no information exists about the long-te...
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