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Posted on June 14th, 2021 by Professor W. A. J. M. De Costa -Senior Professor and Chair of Crop Science Department of Crop Science, Faculty of Agriculture University of Peradeniya Why use fertiliser on crops? Fertilisers are used for two purposes. One purpose is to provide essential plant nutrients that are required for crops to produce an economically-important product (i. e. food for humans, feed for animals, a variety of industrial products, etc.). Just as people require food, crops require nutrients for producing what is expected from them. When a crop is harveste...

Twitter or facebook we. and hearing from you. on our next show we head to new caledonia in the south pacific to find some exotic plants that grow on toxic soil scientists are hoping to harness their remarkable powers join us then to find out more. cool movie.

Scale of this one. the rim fire, as it was named, it bigger than, well, these cities. manhattan, it got as big as that, first of all. it then grew to the size of detroit, and then finally the combined bay area cities of san fran, san jose and oakland. absolutely huge, kelly. >> absolutely huge and absolutely costly as well. you know, it's going to cost millions to do all that special engineering that you're talking about. what about protecting san francisco's water supply as well from those mudslides? >> yeah, good point. so far the water at the reservoir where they get about 80% of their wate...

Clean. still am people who suffered economic losses say the compensation process has been moving more slowly than the oil itself. the administrator of the $20 billion victims fund say the fund has approved some 300,000 claims and also processed 72% of those submitted but he also acknowledges it has paid out to victims less than $4 billion. >> let's put this into sper tech pif. 4.9 million barrels the total amount of oil scientists estimate leaked from april 209, enough to fill nine tankers, 275 hot air balloons or 312 olympic swimming pools, also 87 double-decker buses or even, take a look at ...