Question

name 2 fertilizers give n p k to crops

Answer 1

Compost Both commercially produced compost and homemade compost benefit soil by adding organic matter, providing food for beneficial microbial life, increasing the soil’s water-holding capacity and gradually releasing plant nutrients. Composts made with high amounts of manure or biosolids (sewage sludge) may be high in salts and can burn plants, but composts made with primarily plant residues do not generally contain troublesome amounts of salt. A typical N-P-K ratio for compost is 2-1-1, though its exact nutritional content depends on many factors. Compost that smells like ammonia or is not yet fully decomposed should be allowed to finish breaking down to avoid damaging plants. Compost also contains many micronutrients essential for plant growth. Manure The nutrient content of manure is dependent on many factors, including its age, source and the presence of bedding materials. Because of potential pathogen exposure, raw manure should be avoided. Manure should be a minimum of 180 days old or fully composted before it’s added to growing areas. In addition to containing macronutrients, manure is also a great source of several trace nutrients essential for plant growth. Most cattle and horse manures have an average N-P-K ratio of 1-0.5-0.5 while poultry manures tend to be better high-nitrogen fertilizers (3-1-1 on average). The nutrients in manure are not immediately available to plants and can take up to several years to be released by soil microbes. In general, about half of the total nitrogen is available the first year, with the rest being released slowly over several subsequent seasons. Manure is also an excellent source of organic matter