Recommended rates of potash for grazed grass are 60kg/ha and 30kg/ha of K2O for soil index 0 and 1 respectively. For soils with higher soil fertility levels no potash required.
Very large quantities of potash are removed in grass silage which must be replaced to maintain soil fertility and yield potential. The following is guide to typical potash offtakes from multi-cut silage systems.Low soil magnesium levels will affect grass yield as well as mineral balance in the animal. Apply 50-100 kg/ha MgO every three to four years at Mg index 0. Yield response is less certain at index 1 but magnesium application is justified in terms of insurance for grass yield and mineral balance for the animal, to maintain a soil magnesium index of 2.
Where lime is required and Mg levels are 0 and 1, use magnesian limestone as the most cost effective magnesium source. Where pH is satisfactory, specific magnesium fertilisers (see table below) should be used for soil improvement. Use water soluble forms of magnesium where rapid plant uptake is required.
The one that is most likely study written records would be : C. Historians
The history of mankind started the moment we developed writing technique. With writing, we could get more accurate interpretation about what's been happening in the past
The disc which contains spiral arms of the galaxy part would be used to study the birth starts in a spiral galaxy
Explanation:
A galaxy has four parts and they are bulge, disc, spiral arms and halo
Bulge primarily contains old stars, gas and dust.
The disc contains the spiral arms also, it is the flattened portion of the spiral arms where we could find most of the young stars, gas and dust. Some old stars are also found in this region
Spiral arms are only found in spiral galaxies. It is the curved extension begins from the bulge. Here, also you could find young stars, dust and gas.
Halo is the part where we could find clusters or individual old starts and also the dark matter. The dark matter we can't see but can estimate the gravitational force.
