Which organisms are the producers? fishes, squid, or penguins

None among the fish, squid and penguin is a producer, they cannot create their own food and this is a major characteristics of been a producer. Producers produce their food from inorganic matter and good examples are plants that are able to creats carbohydrates from water, carbon dioxide and sunlight  

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.