[PDF] Top 20 Desarrollo de una plataforma de biología bajo demanda

... for cotton production are required for no-till production (Howard et ...that conventional- till yields were increased in only 1 of 8 site-years by applying higher than recommended K rates ... See full document

... Soil samples were collected to a 15-cm depth in the fall of selected years for Mehlich-I extractable P and K determinations. An equal number of cores were collected from the row and between-row positions to compensate ... See full document

... the conventional system; in a no-till system, the soil sample depth is measured in the layer with the highest nutrient concentration levels (0 - 10 cm); the average yield of the major crops has in- creased ... See full document

... for conventional- tillage cotton systems, less research has dealt with N sources and application methods in no-till production ...no-till cotton yields respond differently to injected ... See full document

... in till systems must be aligned with a correct interpretation of soil chemical attributes and cotton ...urea, potassium and sulfate on the yield of cotton and soil chemical attributes of ... See full document

... of cotton straw, and the effect of wheat straw combined with cotton straw incorporation was the most ...with cotton straw, wheat straw has a higher per- centage of C, and different structure between ... See full document

... Bradford-reactive soil protein (BRSP) and water stable aggregation (WSA) were measured at six sites near Platte, SD, USA. These sites included three rangelands [native grass, rotational grazing (NGRG); tame grass, heavy ... See full document

... m). Cotton (Gossypium hirsutum ...fallow cotton in coastal and cauvery deltaic region of Tamil Nadu and Karaikal used for this ...study. Cotton seeds, treated with cow dung slurry and dried in shade, ... See full document

... 2). Potassium fertiliza- tion did not significantly influence any parameter analyzed, and the same beha- vior was also observed in the combinations between this nutrient and the others (nitrogen and phosphorus), ... See full document

... Soil mineral-N levels (0-0.45-m depth) in 1990 and 1991 for no-till corn followed by no-till wheat (CNT-WNT) and conventional- tilled corn followed by conventional-tilled wheat (CT-WT)..[r] ... See full document

... organic cotton constitutes only 1% of the cotton area ...organic cotton seed, especially in countries where GM cotton is ...non-GM cotton is the legal requirement in some, but not all, ... See full document

... The partial linear and quadratic K regression coefficients for tuber yield were significant in 1988 but not in 1989 (Table 4).. Nitrogen application above this rate de- creased SG both y[r] ... See full document

... Key cotton predators have been shown to feed on plant parts and additional insect hosts in non-crop ...in cotton fields previously planted to crimson ...in cotton adjacent to sorghum due to the ... See full document

... as potassium, have high mobility between individual cells, tissues and long-distance transport by xylem and ...phloem. Potassium can in- crease the production of dry matter and protein content of the plant ... See full document

... In this study, no effect of cultivar, substrate or fertilization level was found on the mean content of magnesium and sulfur in aubergine fruits. Different concentrations of macronutrients in fruits, despite ... See full document

... The conventional ploughing did not give any significant changes in K values after three ...Reduced till treatment and no-till treatment show a significant decrease in the infiltration rate v(t) after ... See full document

... systems. However, the effect of conservation tillage systems on the yield and yield components of different crops should be studied for a long period of time with considering the conditions of soil and climate and ... See full document

... There is no paradox in the behavior of K in soil. Khan et al. 2 generalize as to the lack of suitability of Exch-K as a soil test from their fi ndings from one particular soil, high in non-exchangeable reserves of K. In ... See full document

... We evaluated the N and K fertilization by K- sources effects on concentrations of nutrients, reducing sugars, sucrose and starch in the stem and apical tuber ends from two irrigated fiel[r] ... See full document

... replicate conventional practices found in this cropping system (wheat cover crop) in this ...for conventional and “Entrust” for organic treatments, were applied weekly throughout the month of July up to ... See full document