Manure is better than fertiliser. Manure is derived naturally and adds a lot more than just nutrients to the soil. They increase the activity of the microbes in the soil and increase its fertility.
Fertilizers don't often contain manure, but manure can be used as a fertilizer. Manure contains nitrogen, which is one of the most beneficial nutrient resources in soil.
Manure has some potential disadvantages when used as fertilizer. It can contain weed and pest seeds, rodents and other pests, and pathogens such as E. coli. It can also cause pollution if not managed properly, as the manure may flow into the surface or groundwater.
Disadvantages of Manure
The manures are reported to provide fewer nutrients to plants, and they are unable to provide high-yielding crops. Manures are slowly absorbed by the plants, and they add a lot of humus to the soil. They are made in fields, so transportation is difficult for manures.
Manure contains primary macronutrients—namely nitrogen, phosphorus, and potassium—meaning it can substitute for or complement commercial fertilizers. Manure also supplies secondary macronutrients such as calcium, magnesium, and sulfur, as well as micronutrients.
Don't Use Fresh Manure
If the manure is from a plant-eating animal, it is probably also full of weed seeds, which will not be inhibited from sprouting. If you still want to make use of fresh manure, don't apply it after your garden has been planted.
Adding too much manure can lead to nitrate leaching, nutrient runoff, excessive vegetative growth and, for some manures, salt damage. And using fresh manure where food crops are grown poses risks for contamination with disease-causing pathogens.
Applying too much manure, at the wrong time, or improperly handling it in other ways releases nutrients into the air or into ground or surface waters. Thus, instead of nourishing crops, nutrients become pollutants. Excess nitrogen can leach through soil into groundwater.
Not all manure provides nutrients to plants. As it breaks down, manure containing lots of bedding takes nitrogen from the soil. This reduces the amount of nitrogen available to plants.
Alone, compost may not adequately supply sufficient nutrients—particularly nitrogen during rapid growth phases of crops with high nutrient demands (e.g., watermelon, tomato, and pepper at fruiting) (Tyson and Cabrera, 1993). In addition, composted manure typically is more expensive than fresh or partially aged manure.
Manure adds nutrients to the soil without affecting its fertility. It does not damage crops and produces healthy plants. Fertilizers are chemicals which lower the fertility of the soil if used regularly. They also damage the crops and make them unhealthy for consumption.
Blending manure into the top layer of topsoil will help encourage root growth and health because the manure is packed full of nutrients. The main nutrient released is nitrogen which is needed for plants and vegetables to grow in a sustainable manner.
Vegetable root crops such as beets, carrots, radishes, and potatoes are particularly sensitive to adding horse manure. Salad greens are another vegetable type that can be damaged or burned by applying horse muck to the soil.
Adding manure to the home vegetable garden can increase soil organic matter and may alter soil structure. Adding manure to soil will not change soil texture. Fall is the most common time of year for adding manure to a vegetable garden. The manure may be spread atop the soil or incorporated into the garden soil.
Ultimately, the best management practice for spreading horse manure is to not spread it raw; compost the material first. Also, be sure to spread only at a rate that is agreeable with the nutrients needed for your pastures and the crop that is growing.
Composting livestock manure reduces many of the drawbacks associated with raw manure use. It's also less likely to cause nutrient imbalances. The composted manure can safely be applied directly to growing vegetable crops.
At the very minimum, a garden should be fed with fertiliser twice a year: Once at the start of spring (September in the southern hemisphere, March in the northern hemisphere) for the warm season crops.
Manures and fertilizers help in increasing the fertility of the soil. Repeatedly growing plants on the same soil, leads the soil to becomes deficient in nutrients. So, it is mandatory to add nutrients into the soil.
Sheep manure may just be the best poo in the world. It is a great soil improver and conditioner and contains lots of potassium that will strengthen the cell walls of your plants. Other cold manures include llama, alpaca, and goat, which are also low in nutrients but perfect for building up and improving your soil.
Cow manure is a great all-purpose fertilizer. It's low in nitrogen so it won't burn your tender plants, and has a good balance of nutrients. What's more, since a cow's four stomachs digest its food so thoroughly, very few weed seeds make it through, so you don't have to worry about them.
Manure that is piled and left alone will decompose slowly. This can take three to four months if conditions are ideal. It can take a year or more if the starting material contains a wide carbon:nitrogen ratio (as is the case when manure contains wood chips).
Simply ageing a manure pile for three months can kill about 60% of the weed seeds present, and bacterial counts start to drop within days after the manure leaves the animal. Then, when the aged manure is mixed into the soil, soil microorganisms clear out residual bacteria in about a month.