Agriculture is the science of cultivating soil for growing crops and rearing livestock to provide food and non-food products. Agriculture also encompasses aquaculture, fisheries and forestry. Before agriculture existed humans gathered wild plants and hunted animals. Gradually people learned to grow cereals and root crops. Following this was the domestication of animals. Domesticated animals brought about products such as milk, butter and cheese. Domestication of animals later assisted in ploughing, pulling and transportation.
Agriculture encouraged trade and civilisations developed. In the early 1700s farming machinery was invented resulting in dramatic increases in food production. With the physical labour decreasing farmers could concentrate on new methods of farming such as crop rotations enhancing soil quality and selective breeding. Today agriculture has a responsibility to the environment while facing the challenges of droughts, floods and other natural disasters. Understanding the science associated with agriculture helps to produce higher quality food and non-food products.
Biostimulants
Biostimulants are natural or synthetic substances that when applied to soil, seeds or plants, stimulate natural processes to enhance nutrient uptake, nutrient use efficiency, overall crop quality and tolerance to abiotic stress.
Increased root growth, root diameter, water holding capacity of the soil and increased nutrient availability are some factors positively affected by biostimulants.
Biostimulants have a small ecological footprint and do not affect MRL. They are not crop protection agents and will have no effect on pests and diseases. Rather work preventatively by strengthening the crop.
Fertiliser
Fertilisers exist from both natural and synthetic origins. Fertilisers are applied to the soil or plant tissue to enhance the natural fertility of the soil. Fertilisers replace needed elements taken from the soil by previous crops. Fertile soil will promote growth where light, temperature and moisture conditions are favourable. The soil will lose nutrients and its productive capacity after each harvest.
Nitrate Fertilisers are Nitrogen based. The main nitrogen-based fertiliser products include ammonium nitrate (AN), calcium ammonium nitrate (CAN) and urea ammonium nitrate (UAN).
Unfavourable weather and soil conditions can lead to Nitrogen volatilization, immobilization, denitrification or leaching. Nitrogen inhibitors are compounds that can be added to fertiliser, these inhibitors reduce nitrous oxide emissions by suppressing microbe action that converts Nitrogen into Nitrate. This allows the nitrogen to be available for longer periods, increasing the health of the plant and reducing the risk of nitrate leaching and denitrification.
Phosphorus fertilisers are made from phosphate rock. Common phosphate fertilisers include single superphosphate (SSP), triple superphosphate (TSP), mono ammonium phosphate (MAP), di-ammonium phosphate (DSP) and ammonium polyphosphate liquid.
Potassium Fertilisers are derived from potash rock. These fertilisers include Potassium chloride (KCl), Potassium sulphate (K2SO4) or sulphate of potash (SOP), Potassium nitrate (KNO3), known as KN.
Animal Feed
Food grown and developed specifically for feeding domestic animals is known as animal feed. Ingredients are carefully selected and blended to make a product that provides a high nutritional diet. This diet should maintain the animals’ health and increase the quality of end products.
Like people, animals require a balanced diet to maintain good health, growth and reproduction. This balanced diet includes carbohydrates, proteins, fats and oils, minerals, vitamins and water. The well-being of an animal is highly dependent on its feed.
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