The tropical agricultural land is capable of harvesting throughout the year, but farmers face the problem that organic fertilizer on tropical agricultural land unsuccessful. Farmlands in the wet tropical area mostly have low soil organic C content. In intensive farming areas generally, have a low soil fertility due to the thickness of the thin layer of soil. Therefore, it is necessary to cultivate organic material, but farmers bumped into the constraints of organic fertilizer on tropical agricultural land unsuccessful.
Farmers would expect the fertilization of organic matter on agricultural land would increase crop yields. Farmers add organic materials derived from manure or compost. The organic material will pass through the decomposition process. The process of decomposition of this organic material will produce nutrients for plants, especially in developing organic farming.
Farmers will become more difficult if agriculture uses sloping critical land. The earth’s surface span can be either flat or corrugated fields. The hilly topography of the land will cause agriculture to be carried out on hilly terrain. The area on the slopes of this hill has a varied slope. Agriculture on the slopes is the one that faces the problem. Sloping land often turns into critical land (you can read the previous article as a reference: Dry and critical land).
Agriculture uses sloping critical land requires more complex treatment. Generally agriculture uses fertile and flat land. Farming using sloping critical land requires proper management.
Why is critical land happening on the sloping ground?
On sloping land often turns into a critical agricultural land for several reasons, including: First, the destruction of the soil by the blow of rain and the strength of the water current. Rainwater when it falls directly on the soil surface damages the bonding between soil particles. The next effect, the topsoil will be washed away by the flow of water. Second, low absorption of groundwater and surface runoff that damage the soil. Dense and hard soil causes surface water difficult to enter. Water will flow at the surface of the soil causing the destructive force of the soil.
How to handle agriculture using sloping critical land?
The slope of the land can affect the degree of damage to the critical land. The planters manage critical land can apply the rules of soil conservation. The conservation of this land has the following objectives: Improving and maintaining soil conditions in order to withstand the destruction of the soil by the blow of raindrops and the strength of the flow of water. Closing the soil surface to be protected from destructive power or rainwater blows. Enhance soil absorption and regulate the flow of the surface to flow with a non-destructive force.
Planters must take into account the slope of agricultural land it has. On a critical land that has a too sharp slope need the right method. One of the efficient and effective methods of managing critical land at the farm level is the method of making terraces and trenches following contour lines. This method is done by strengthening the edge of the terrace On the edge of the terraces is reinforced with obstacles or planting annual crops, especially leguminous trees.
The contour terrace is a ridged cross-sectional terrace that follows the contour line. This contour terrace is suitable to be practiced on farms with a slope of 10% -50%.
Contour Terrace on Agriculture uses Sloping Critical Land
The stages of the activities to create a contour terrace is done by using manual tools and digital tools. 1. Determining the location of the beginning terrace. 2. Determining the contour lines. 3. Determining the contour lines next. 4. Determine the distance of the contour line. 5. Making the terrace.
Farmers set the lines and contour spots throughout the agricultural land area first, then continued to make the terrace.
On land with a slope of 10% -50% ideal is a contour terrace, mound terrace, or stone terrace. If the land is very steep so it is difficult to dig the soil, then made retaining terrace (from the log).
Farmers are relatively easier to make this contour terrace compared to other methods. Although this way to deal with agricultural issues with critical land but can to deal with agriculture with fertile land. On fertile farmland, farmers can create terraces to prevent physical damage to the soil resulting in a decrease in soil productivity.
Agricultural land can change to critical land. Knowledge of change to critical land is used to support the cultivation of plants in our garden.
We will encounter greater obstacles when meeting this critical land than fertile land. How is agricultural land change to critical land? How did the critical land occur? In essence, the change to critical land occurs due to the continuous decline in land productivity. The decrease in soil productivity is caused by decreased soil fertility.
Causes of Agricultural Land Changes to Critical Land
There are several factors that cause the conversion of agricultural land into a critical land. The factors causing the change to become the critical land are among others :
Farmers continue to cultivate agricultural land without proper crop management, soil and water.
In some countries, critical land occurs due to shifting cultivation systems accompanied by logging and burning of land.
The practices of agricultural systems that do not take into account the concepts and efforts of soil conservation.
Critical land can occur due to natural disasters, such as field or forest fires, and floods.
The critical land is essentially land where the physical, chemical, and biological conditions of the soil are not productive in terms of agriculture. The critical land is mostly caused by physical damage to the soil. The physical damage to the soil is mainly due to the loss of topsoil which is fertile due to erosion. Such land leads to unproductive farming.
Another impact of erosion hazard is the destruction of the hydrological functions of agricultural land, the silting of rivers, reservoirs, dams, waterways, and environmental pollution.
Critical land faces two main issues.
Critical land facing problems encompasses two points of interest.
How to repair/rehabilitate degraded land becomes productive land.
How to prevent the rehabilitated lands from the physical damage of the land based on the geographical location of the land.
We need to consider in terms of cost and technicality to rehabilitate or prevent the emergence of critical land. Difficulties that are too great in dealing with critical land will burden our farming cultivation.